BEGIN:VCALENDAR VERSION:2.0 PRODID:-//https://math.washington.edu//NONSGML iCalcreator 2.41.90// CALSCALE:GREGORIAN METHOD:PUBLISH UID:61636362-3165-4232-b639-323238373435 X-WR-RELCALID:7663eb4b-c942-4b71-ba05-45eecb92b950 X-WR-TIMEZONE:America/Los_Angeles X-WR-CALNAME:Subscribe to this calendar BEGIN:VTIMEZONE TZID:America/Los_Angeles TZUNTIL:20281105T090000Z BEGIN:STANDARD TZNAME:PST DTSTART:20231105T020000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RDATE:20241103T020000 RDATE:20251102T020000 RDATE:20261101T020000 RDATE:20271107T020000 END:STANDARD BEGIN:DAYLIGHT TZNAME:PDT DTSTART:20240310T020000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RDATE:20250309T020000 RDATE:20260308T020000 RDATE:20270314T020000 RDATE:20280312T020000 END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:61ad5090-0bca-4313-a419-6c65093a5acd DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20240612T202444Z DESCRIPTION:Speaker: Eric Zhang\n\nAdvisor: James Zhang DTSTART;TZID=America/Los_Angeles:20240617T140000 DTEND;TZID=America/Los_Angeles:20240618T000000 LAST-MODIFIED:20240612T202444Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-06-17/general-exam END:VEVENT BEGIN:VEVENT UID:3590c01a-ee45-47a0-88dd-88707159f755 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240702T165233Z DESCRIPTION:Speaker: Lidan Wang\, Nankai University\, China\n\nIn this talk \, we discuss stochastic 3D Burgers equations driven by multiplicative noi se\, with uncertainty occurring in initial conditions as well. By utilizin g Malliavin calculus techniques and randomization method\, we establish th e global well-posedness result for stochastic Burgers equations with rando m initial data. Our work can be viewed as an extension of the one-dimensio nal result in [SIAM J Math Analysis\, 2013] to the three-dimensional case. \nBased on the joint work with Zhang and Zhou.\n  DTSTART;TZID=America/Los_Angeles:20240711T143000 DTEND;TZID=America/Los_Angeles:20240711T153000 LAST-MODIFIED:20240702T165233Z LOCATION:PDL C-38 SUMMARY:: Stochastic 3D Burgers equations with random initial data TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-07-11/stochastic-3d-burgers-equ ations-random-initial-data END:VEVENT BEGIN:VEVENT UID:c6946849-f2be-4328-baff-561377b455e8 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20240709T154134Z DESCRIPTION:Speaker: Casey Koch Larue\n\n'Generalizations of the Exterior a nd Symmetric Power Functors on Categories of Modules using Coinvariants of Tensor Power Functors'\nAdvisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20240712T140000 DTEND;TZID=America/Los_Angeles:20240713T000000 LAST-MODIFIED:20240709T154134Z LOCATION:PDL C-38 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-07-12/final-exam END:VEVENT BEGIN:VEVENT UID:fcf716e8-c450-472e-bfc6-686e67caeb4a DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20240722T174306Z DESCRIPTION:Speaker: Raghav Tripathi\n\n'Stochastic Analysis on Graphons'\n Advisor: Soumik Pal DTSTART;TZID=America/Los_Angeles:20240730T100000 DTEND;TZID=America/Los_Angeles:20240731T000000 LAST-MODIFIED:20240722T174306Z LOCATION:Gates 271 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-07-30/final-exam END:VEVENT BEGIN:VEVENT UID:9f89d031-6f90-4d8e-985b-22de3b837483 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20240722T174425Z DESCRIPTION:Speaker: Alex Wang\n\nAdvisor: Bianca Viray DTSTART;TZID=America/Los_Angeles:20240801T110000 DTEND;TZID=America/Los_Angeles:20240802T000000 LAST-MODIFIED:20240722T174425Z LOCATION:SMI 105 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-08-01/general-exam END:VEVENT BEGIN:VEVENT UID:dd9c1e3a-9858-4f0a-8e55-ba1821dd8831 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20240808T151251Z DESCRIPTION:Speaker: Andrew Tawfeek\n\nAdvisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20240813T140000 DTEND;TZID=America/Los_Angeles:20240814T000000 LAST-MODIFIED:20240808T151251Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-08-13/general-exam END:VEVENT BEGIN:VEVENT UID:70c38f5a-9024-4ac8-a73b-8cdc60437383 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20240806T235106Z DESCRIPTION:Speaker: Carlos Rivera\n\n'Reciprocity and local to global prin ciples on p-adic function fields'\nAdvisor: Bianca Viray DTSTART;TZID=America/Los_Angeles:20240815T100000 DTEND;TZID=America/Los_Angeles:20240816T000000 LAST-MODIFIED:20240806T235106Z LOCATION:PDL C-38 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-08-15/final-exam END:VEVENT BEGIN:VEVENT UID:b81ca5d6-463c-48d6-8759-9e4c229697fd DTSTAMP:20260617T145208Z CATEGORIES:Conferences CLASS:PUBLIC CREATED:20240904T215100Z DESCRIPTION:A celebration of the works of Chris Burdzy\, Don Marshall and G unther Uhlmann\n\nOrganizers: Alexis Drouot\, Soumik Pal and Steffen Rohde \n\n \n\nSchedule:\n\n\n \n Welcome address at 9:45 am.\n \n \n 10 am -- 10:45 am - Soumik Pal speaks on the contributions of Chris Burdzy\n \n \n 10:55 am -- 11:40 am - Steffen Rohde speaks on the contributions of Don Marshall\n \n \n 11:50 am -- 12:35 pm - Gabriel Paternain speaks on the contributions o f Gunther Uhlmann   \n \n \n Lunch break from 12:35 pm till 2:30 pm\n \n \n 2:30 pm – 3:00 pm: Talk by Alexis Drouot \n \n \n 3:10 – 3:40 pm: Talk by Dima Dr usvyatsky\n \n \n 3:50 – 4:20 pm: Talk by Bobby Wilson\n \n \n 4:30 – 5:00 pm: T alk by Jon Zhu\n \n \n Concludes at 5 pm.\n \n \n Dinner at 5:30 p.m. \n \n\n\n\n Register here for attendance and the conference dinner. DTSTART;TZID=America/Los_Angeles:20240919T094500 DTEND;TZID=America/Los_Angeles:20240919T170000 LAST-MODIFIED:20240916T172445Z LOCATION:CMU 226 SUMMARY:: Analysis Geometry Probability day TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-09-19/analysis-geometry-probabi lity-day END:VEVENT BEGIN:VEVENT UID:5f4162c5-540a-41f9-b5b8-7e97b3309252 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20240610T223211Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n \n Graduate Admissions Committee - Koblitz\n \n \n Committee Reports\n New B usiness\n Executive Session\n Adjournment\n\n\n\n\nMINUTES\n\nThe regular me eting of the faculty of the Department of Mathematics was held virtually v ia Zoom at 11am PST\, September 24\, 2024. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.\n\nChair's Remar ks\n\nMax Lieblich opened up the floor to the attendees to share any good news or announcements.\n\nFaculty can sign up for their choice of committe e(s) and add service/project suggestions via a shared Google doc.\n\nWe wi ll be conducting a search for Acting Assistant Professors this year.\n\n20 27 will be the 100th year anniversary of the department. If you would like to volunteer in helping organize a celebratory event\, please add your na me to the service doc.\n\nAnnouncements\n\nThe colloquia will kick off wit h Thomas Rothvoss speaking on October 18th followed by a joint talk with C SE and Statistics in November. Please try to attend these talks and also j oin the pre-colloquia socials in the math lounge.\n\nHusky Math Academy is a new program under the UW Math Circle umbrella. They are looking for mor e instructors and TAs as the program continues to expand. The UW Math Circ le is also looking for speakers who are able to relate to middle and high school students. If any of the colloquium speakers meet this criteria\, pl ease ask them if they'd also be interested in giving a talk at the Math Ci rcle.\n\nMath Day is currently stalled due to support changes at the UW. I t’s been a very popular and successful outreach program that has been offe red for many years but to keep it going volunteers will need to help build the program from the bottom up.\n\nPutnam Prep is in need of volunteers t o help with the training sessions.\n\nAn alumni event is being planned for the Joint Mathematics Meetings (JMM) downtown on January 9th. Please save the date on your calendars. More details to come.\n\nThe Graduate Admissi ons Committee is in need of volunteers from a variety of fields and backgr ounds to help review applications from prospective grad students.\n\nFarbo d Shokrieh has joined the Senate Executive Committee of the Faculty Senate and will continue to provide regular updates and gather departmental feed back as much as possible again this year. \n\nADJOURNMENT\n\nThere being n o committee reports or new business\, the meeting passed into executive se ssion at 11:53am. DTSTART;TZID=America/Los_Angeles:20240924T110000 DTEND;TZID=America/Los_Angeles:20240924T120000 LAST-MODIFIED:20241007T223711Z LOCATION:via Zoom SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-09-24/faculty-meeting END:VEVENT BEGIN:VEVENT UID:e07bce15-9cd6-4f79-a1fb-177d6b98dbfb DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20240923T233649Z DESCRIPTION:Speaker: Joonyong Choi\n\nCoupled Time Fractional Equations and Probabilistic Representation\n\nAdvisor: Zhen-Qing Chen DTSTART;TZID=America/Los_Angeles:20240924T133000 DTEND;TZID=America/Los_Angeles:20240924T143000 LAST-MODIFIED:20240924T200821Z LOCATION:PDL C-38 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-09-24/final-exam END:VEVENT BEGIN:VEVENT UID:6b10b660-0faf-47c9-a1fb-4a09b26220c8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240920T164557Z DESCRIPTION:Speaker: Zhenqing Chen\, University of Washington\n\nConsider a symmetric strongly local regular  Dirichlet form on a locally compact sep arable metric measure space \$({\cal X}\, m)\$ whose heat kernel admits su b-Gaussian heat kernel estimate.  Let  \$D\$  be a uniform subdomain of \$ {\cal X}\$. There is a conservative reflected diffusion process \$X\$ on \ $\overline D\$.  The trace Dirichlet form on the boundary of  \$D\$ is the Dirichlet form of the diffusion process \$X\$ time-changed by a smooth me asure \$\mu\$ with full quasi-support on \$\partial D\$. In this talk\, we give Besov space type characterization of the domain of the trace Dirichl et forms for any good smooth measure \$\mu\$ on the boundary \$\partial D\ $.  We investigate properties of the harmonic measure of \$X\$  on the bou ndary \$\partial D\$. In particular\, we provide a condition equivalent to the doubling property of the harmonic measure. We then present characteri zation and estimates of the jump kernel of the trace Dirichlet form under the doubling condition of the harmonic measure on \$\partial D\$. \n\nThis is based on a joint work with Shiping Cao. DTSTART;TZID=America/Los_Angeles:20240930T143000 DTEND;TZID=America/Los_Angeles:20240930T153000 LAST-MODIFIED:20240920T165204Z LOCATION:SMI 405 SUMMARY:: Boundary trace of reflected diffusions on uniform domains TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-09-30/boundary-trace-reflected- diffusions-uniform-domains END:VEVENT BEGIN:VEVENT UID:6f9f1be7-f04a-4df1-a925-b359512b72bd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240926T215054Z DESCRIPTION:Speaker: Justin Bloom (UW)\n\n\n\n\nTitle pretalk:  Finite grou p schemes and restricted Lie algebras\n \n\nAbstract pretalk: We will revi ew examples of Hopf algebras using the language of group schemes\, Lie alg ebras\, and Jacobson's restricted Lie algebras in positive characteristic. \n\n \n\n\nTitle: Deforming tensor products for restricted representations of Lie algebras. \n\nAbstract: What can the classification of Hopf algebr as of small dimension over a field tell us about families of tensor catego ries? Fixing a finite dimensional algebra\, letting a Hopf algebra structu re be taken as variable is equivalent under Tannakian duality to letting t he k-linear tensor product over the category of modules be variable. Ideal ly we could describe explicitly how the Green ring is changing\, but for a lgebras of wild representation type this is likely infeasible. It turns ou t starting with the restricted enveloping algebra for a restricted Lie alg ebra (characteristic p > 0) allows a nice perspective from tensor-triangul ar geometry. We will see an example of a tame Lie algebra\, with all Hopf algebra structures known up to isomorphism\, satisfying a tt-geometry flav ored property pertaining to its variable Green ring. \n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241001T133000 DTEND;TZID=America/Los_Angeles:20241001T153000 LAST-MODIFIED:20240926T215054Z LOCATION:PDL C-38 SUMMARY:: Deforming tensor products for restricted representations of Lie a lgebras TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-01/deforming-tensor-products -restricted-representations-lie-algebras END:VEVENT BEGIN:VEVENT UID:523ed0d5-0746-4638-a4ee-efd307365ef0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240925T153514Z DESCRIPTION:Speaker: Julie Rowlett (Chalmers University)\n\nAn integrable p olygon is one whose interior angles are of the form π/n for positive integ ers n. As an exercise\, can you determine all integrable polygons? I'll di scuss joint work with Gustav Mårdby in which we obtain new heat trace inva riants for these polygons. It turns out that integrable polygons are also precisely those polygons which strictly tessellate the plane. I will also discuss joint work with M. Blom\, H. Nordell\, O. Thim\, and J. Vahnberg i n which we explore the generalization of integrable polygons to higher dim ensions. This includes an equivalence between the geometric characterizati on of strict tessellation\, an analytic characterization of Dirichlet Lapl ace eigenfunctions\, and an algebraic characterization of crystallographic Coxeter groups. DTSTART;TZID=America/Los_Angeles:20241001T133000 DTEND;TZID=America/Los_Angeles:20241001T153000 LAST-MODIFIED:20240925T153514Z LOCATION:PDL C-401 SUMMARY:: Spectral invariants of integrable polygons TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-01/spectral-invariants-integ rable-polygons END:VEVENT BEGIN:VEVENT UID:771c8cd3-cc32-4f92-a2f5-4ebb468b0651 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241001T153213Z DESCRIPTION:Speaker: Brian Nugent (University of Washington)\n\nThis will b e an introduction to the derived category which will focus on the key defi nitions and ideas with less technical details. We will also do some exampl es to see how one works in the derived category. DTSTART;TZID=America/Los_Angeles:20241002T161500 DTEND;TZID=America/Los_Angeles:20241002T171500 LAST-MODIFIED:20241001T153235Z LOCATION:CMU 230 SUMMARY:: Student s Algebraic Geometry Seminar A Beginners Guide to the Der ived Category TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-02/student-s-algebraic-geome try-seminar-beginners-guide-derived-category END:VEVENT BEGIN:VEVENT UID:a45e78fc-68f8-448a-9215-e51013049729 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240926T002921Z DESCRIPTION:Speaker: hosted by Sara Billey and Paige Helms\n\nAre you a gra duate student applying for jobs this year?  If so\, please join us for a b rown bag lunch on Thursday Oct 3 at 1:00pm - 2:00pm.  We will either be in the conference room or in the lounge.  Bring your own lunch.   This is a supportive gathering to share ideas and information about the job applicat ion process and to encourage camaraderie.  We will talk about creating app lication materials\, requesting letters of recommendation\, and how to fin d the advertisements for jobs of interest to you.   Faculty are welcome to come share their experience with applications and on the hiring committee .   \n\nPlease note\, the lunch is open only to students who are currently applying for jobs and/or planning to graduate this year.   See the talk i n November aimed at  transition to research if just want a feeling for wha t comes next.    DTSTART;TZID=America/Los_Angeles:20241003T130000 DTEND;TZID=America/Los_Angeles:20241003T140000 LAST-MODIFIED:20241001T162216Z LOCATION:Padelford Math Conference Room inside the Main Office SUMMARY:: Jobs Lunch TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-03/jobs-lunch END:VEVENT BEGIN:VEVENT UID:8397a782-3a8f-4e60-b267-cb9fbb02197f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T050519Z DESCRIPTION:Speaker: TBD\n\nThis event features panelists who either recent ly did internships or have done workshops with the Erdős Institute. They w ill share their experience about the work and the application process. If you are considering applying for internships this summer\, this will be a great time to ask questions\, formulate your goals for next summer\, make a plan of attack toward achieving those goals\, and encourage each other a long the way.    DTSTART;TZID=America/Los_Angeles:20241003T160000 DTEND;TZID=America/Los_Angeles:20241003T173000 LAST-MODIFIED:20251007T050539Z LOCATION:Padelford C-38 SUMMARY:: Internship Ideas Erdos Institute and Fall Planning TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-03/internship-ideas-erdos-in stitute-and-fall-planning END:VEVENT BEGIN:VEVENT UID:f983cec6-fc7f-46a7-b8c0-5e999442ba19 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240910T152907Z DESCRIPTION:Speaker: Junaid Hasan\, Vasily Ilin\, Jack Kendrick\, Garrett Mulcahy\, Nelson Niu\, Tony Zeng and maybe more!\n\nThis event features pa nelists who either recently did internships or have done workshops with th e Erdős Institute. They will share their experience about the work and the application process. If you are considering applying for internships this summer\, this will be a great time to ask questions\, formulate your goal s for next summer\, make a plan of attack toward achieving those goals\, a nd encourage each other along the way.   DTSTART;TZID=America/Los_Angeles:20241003T160000 DTEND;TZID=America/Los_Angeles:20241003T173000 LAST-MODIFIED:20241003T225922Z LOCATION:Padelford C-38 SUMMARY:: Internship Ideas and Planning TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-03/internship-ideas-and-plan ning END:VEVENT BEGIN:VEVENT UID:2ddb456c-1abe-4cd9-a8ef-eccd2e497e79 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241002T202525Z DESCRIPTION:Speaker: Tracy Chin\n\nTitle: Real Algebraic Geometry\n\nAbstra ct: This talk will be a survey of a hierarchy of classes of real polynomia ls. Along the way\, we'll investigate the underlying geometry and see some surprising connections to combinatorial objects. We'll start from real-ro oted univariate polynomials\, then make our way through real stable polyno mials to Lorentzian and log-concave polynomials\, building more evidence a long the way that all math is secretly linear algebra. DTSTART;TZID=America/Los_Angeles:20241004T143000 DTEND;TZID=America/Los_Angeles:20241004T153000 LAST-MODIFIED:20241002T202525Z LOCATION:PDL C-401 SUMMARY:: Back To School Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-04/back-school-seminar END:VEVENT BEGIN:VEVENT UID:43de1f48-3b27-489f-a54d-42750f1be380 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240926T001728Z DESCRIPTION:Speaker: Milind Hegde\, Columbia University\n\nIn the colored a symmetric simple exclusion process\, one places a particle of 'color' \$-k \$ at each integer site \$k \in \mathbb Z\$. Particles attempt to swap pla ces with an adjacent particle: at rate \$q\in[0\,1)\$ if they are initiall y ordered (e.g.\, 1 then 2) and at rate 1 if ordered in reverse (e.g.\, 2 then 1)\; thus the particles tend to get more ordered over time. We will d iscuss the scaling limit of this process\, which lies in the Kardar-Parisi -Zhang universality class. It is given by the directed landscape\, which w as first constructed in 2018 by Dauvergne-Ortmann-Virág as a limit in a ve ry different setting - of fluctuations of a model of a random directed met ric. The Yang-Baxter equation and line ensembles (collections of random no n-intersecting curves) with certain Gibbs or spatial Markov properties wil l play fundamental roles in our discussion.\n\nThis is based on joint work with Amol Aggarwal and Ivan Corwin. DTSTART;TZID=America/Los_Angeles:20241007T143000 DTEND;TZID=America/Los_Angeles:20241007T153000 LAST-MODIFIED:20240926T001728Z LOCATION:SMI 405 SUMMARY:: The scaling limit of the colored asymmetric simple exclusion proc ess TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-07/scaling-limit-colored-asy mmetric-simple-exclusion-process END:VEVENT BEGIN:VEVENT UID:839d176a-bf62-46a4-bd39-88bb500687c7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241002T180153Z DESCRIPTION:Speaker: Roberto Svaldi (Milan)\n\n\n\n\nTitle pretalk: Foliati ons and birational geometry.\n\nAbstract pretalk: In this talk I will intr oduce the notion of foliation on an algebraic variety.\nI will focus on th e basic notions involved in the study of the birational geometry of foliat ions\, and will give some examples and motivations for the study of such o bjects.\nNo prior knowledge/familiarity with the concept of foliation will be assumed.\n\n \n\n\nTitle talk:\nTowards a moduli theory for canonical models of foliated surfaces of general type.\n\nAbstract talk:\nIn recent years there has been considerable progress in extending the ideas and tech niques of the Minimal Model Program beyond the realm of algebraic varietie s to the study of foliations. For the case of foliations on surfaces\, McQ uillan\, Brunella and Mendes have obtained a detailed classification — ana logous to the Enriques-Kodaira classification.\nIn this seminar\, I will e xplain how\, using the birational classification of foliations on surfaces and MMP techniques\, we can start constructing moduli spaces for minimal foliations that have maximum Kodaira dimension on surfaces. While there ar e many similarities between the birational variational theory and the theo ry of foliations\, a whole cornucopia of new phenomena appears in the latt er. Accordingly\, I will try to explain:\n(1) what these new phenomena are \;\n(2) what new difficulties they introduce into the identification of a good functor of moduli for the aforementioned foliations\;\n(3) how these difficulties can be overcome to obtain a satisfactory theory of moduli and a construction of the associated moduli space for foliated surfaces of ge neral type.\nThe talk will feature joint work with C. Spicer\, and joint w ork in progress with M. McQuillan\, C. Spicer\, and S. Velazquez.\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241008T133000 DTEND;TZID=America/Los_Angeles:20241008T153000 LAST-MODIFIED:20241002T180153Z LOCATION:PDL C-38 SUMMARY:: Towards a moduli theory for canonical models of foliated surfaces of general type TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-08/towards-moduli-theory-can onical-models-foliated-surfaces-general-type END:VEVENT BEGIN:VEVENT UID:1caef001-8d12-4923-b802-911750812778 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20240610T223502Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n \n Student Cr edit Hour Changes\n \n \n Announcements\n \n Colloquium - Rohde\n Graduate - Pev tsova\n \n \n Committee Reports\n \n Undergraduate Program - Thomas\n \n \n New Bu siness\n Executive Session\n Adjournment\n\n\n\n\nMINUTES\n\nThe regular mee ting of the faculty of the Department of Mathematics was held virtually vi a Zoom at 3:30pm PST\, October 8\, 2024. Max Lieblich\, Chair\, presided o ver the meeting. Rose Choi was the recording secretary.\n\nThe meeting beg an with approval of the previous meeting’s minutes.\n\nChair's Remarks\n\n The College is facing some financial challenges which will affect retentio n offers and hires.\n\nVarious faculty within the department are working h ard to bolster our own programs and outreach efforts. Some examples:\n\n\n Julia Pevtsova and Danny Shi are continuing their amazing work with UW Mat h Circle and Husky Math Academy bringing outside interest by teaching kids about the beauty of math.\n Cynthia Vinzant is running a public lecture se ries that will make math accessible to a general audience.\n Chris Hoffman and Charles Camacho are working on a program to help support underserved c alculus students.\n Andy Loveless is working on setting up internal awards for teaching.\n Soumik Pal is helping develop an alumni board and organize the department’s centennial celebration.\n\n\nOur credit hours for undergr aduate courses fall short in comparison to similarly demanding courses at parallel departments. Therefore\, the Undergraduate Program Committee prop oses increasing all 2xx/3xx/4xx classes currently at three credits to four student credit hours. If you have any questions or comments please route them to the committee this week. They hope to send out a voting poll by ne xt week.\n\nMath Day is in need of an organizer or team in order to contin ue. \n\nThere will be a floor to the funds available via the department fo r summer grad support.\n\nThe AAP appointments committee is still being fo rmed.\n\nAnnouncements\n\nFaculty are encouraged to come to the colloquia and the pre-talk gathering in the math lounge. The first talk of the quart er will be by our own Thomas Rothvoss. \n\nJulia Pevtsova reminded faculty to submit their nominations for graduate student awards by next Tuesday. She also reiterated that summer teaching is not a guarantee for grad stude nts past their first year. Students will now be required to apply for summ er teaching positions. If you have an RA\, please consider supporting your student this summer.\n\nSara Billey is running a community development co mmittee which will expose students to different opportunities such as inte rnships. \n\nCommittee Reports\n\nThe Undergraduate Program Committee prop oses changing the prerequisites for Math 112 and Math 396/491/493 from STA T. An email with the reasoning for both was sent in advance of the meeting . Votes were held\, passed\, and approved.\n\nADJOURNMENT\n\nThere being n o new business\, the meeting passed into executive session at 4:16pm. DTSTART;TZID=America/Los_Angeles:20241008T153000 DTEND;TZID=America/Los_Angeles:20241008T163000 LAST-MODIFIED:20241028T233950Z LOCATION:via Zoom SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-08/faculty-meeting END:VEVENT BEGIN:VEVENT UID:22ae3623-1275-424b-ae1e-139e5a4ad32f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240924T203611Z DESCRIPTION:Speaker: Daoji Huang\, Institute for Advanced Study\n\nAbstract :\n\nInfluential work of Hodge from the 1940s led the way in using Gröbner bases to combinatorially study the Grassmannian. In this talk\, we will f ollow Hodge's approach in order to investigate certain subvarieties called positroid varieties. Positroid varieties\, introduced by Knutson–Lam–Spey er in 2013\, provide a stratification of the Grassmannian which enjoys man y advantages over other previously studied decompositions. In this talk\, we will present an explicit and combinatorial description of the standard monomials and Gröbner bases of positroid varieties under the Plücker embed ding.  As applications\, we establish a connection between promotion and e vacuation on semi-standard Young tableaux and cyclic and reflectional symm etry of positroid varieties. We also give a formula for computing the T-ch aracter of the cyclic Demazure modules\, using a recurrence on the Hilbert series of positroid varieties. This is joint work with Ayah Almousa and S hiliang Gao.\n\nNote: This talk begins with a pre-seminar (aimed at gradua te students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meet ing: https://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241009T153000 DTEND;TZID=America/Los_Angeles:20241009T170000 LAST-MODIFIED:20240930T045053Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Standard monomials for positroid varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-09/standard-monomials-positr oid-varieties END:VEVENT BEGIN:VEVENT UID:12825451-c9f3-4c26-8519-284293944128 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241001T150913Z DESCRIPTION:Speaker: Jonathan Zhu (UW)\n\nWe'll survey the use of Łojasiewi cz-type inequalities in geometric flows\, as well as recent methods for pr oving `explicit' Łojasiewicz inequalities. DTSTART;TZID=America/Los_Angeles:20241009T160000 DTEND;TZID=America/Los_Angeles:20241009T170000 LAST-MODIFIED:20241001T150913Z LOCATION:PDL C-038 SUMMARY:: ojasiewicz inequalities and mean curvature flow TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-09/ojasiewicz-inequalities-a nd-mean-curvature-flow END:VEVENT BEGIN:VEVENT UID:4e631777-d6d4-4892-98f3-c001765c8ff4 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241004T053401Z DESCRIPTION:Speaker: Leopold Mayer\, University of Washington\n\nThe derive d category is no longer an abelian category\, so we need to find some othe r structure to work with. In this talk we will define the notion of a tria ngulated category\, wherein distinguished triangles roughly replace the ro le of short exact sequences. We will see how triangulated categories can b e broken up into simpler pieces via semi-orthogonal decompositions\, and w e will discuss semi-orthogonal decompositions for the derived categories o f projective spaces and blowups. DTSTART;TZID=America/Los_Angeles:20241009T161500 DTEND;TZID=America/Los_Angeles:20241009T171500 LAST-MODIFIED:20241004T053422Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp Triangle Power TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-09/students-algebraic-geomet ry-seminar-nbsp-triangle-power END:VEVENT BEGIN:VEVENT UID:11cc1862-3d9c-451f-8baa-e3e753895a79 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241009T224315Z DESCRIPTION:Speaker: Ryan Bushling\, Linhang Huang\, Jack Kendrick\, Garret t Mulcahy\, Sebastian Munoz-Thon\, Sean Richardson\, Ignacio Tejeda\n\n5 m inute research introductions given by graduate students in analysis. All g raduate students (especially first and second years) are welcome!  DTSTART;TZID=America/Los_Angeles:20241010T123000 DTEND;TZID=America/Los_Angeles:20241010T133000 LAST-MODIFIED:20241009T224623Z LOCATION:PDL C-401 SUMMARY:: GSAS Lightning Talks TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-10/gsas-lightning-talks END:VEVENT BEGIN:VEVENT UID:6114b209-603c-4a14-b648-3225ec2c642e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241007T224937Z DESCRIPTION:Speaker: Sándor Kovács\n\nWe will explore how higher dimensiona l (algebraic) geometry can help us understand plane curves better. DTSTART;TZID=America/Los_Angeles:20241010T163000 DTEND;TZID=America/Los_Angeles:20241010T180000 LAST-MODIFIED:20241007T232417Z LOCATION:PDL C-038 SUMMARY:: Conics and Cubics TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-10/conics-and-cubics END:VEVENT BEGIN:VEVENT UID:d2a2614f-1b00-4d95-b923-7aca8994a95e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241008T201625Z DESCRIPTION:Speaker: Linhang Huang\n\nIn this talk\, I will introduce a pro babilistic object called the continuum random tree (CRT). We will talk abo ut how gluing two such trees together can help us model the quantum gravit y in 2D. We will go through the definition of these random trees as well a s their associated random process—Brownian excursion. Using the techniques from probability and topology\, we will show why the gluing process of tw o CRTs produces a topological 2-sphere. DTSTART;TZID=America/Los_Angeles:20241011T143000 DTEND;TZID=America/Los_Angeles:20241011T153000 LAST-MODIFIED:20241008T201744Z LOCATION:PDL C-401 SUMMARY:: Back To School Seminar Mating of Continuum Random Trees TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-11/back-school-seminar-matin g-continuum-random-trees END:VEVENT BEGIN:VEVENT UID:9f4a2ad1-81ef-48b5-92ec-ea29c7e19778 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240927T224830Z DESCRIPTION:Speaker: Kesav Krishnan\, University of Victoria\n\nThe Monomer -Dimer model is a Gibbs measure defined on the space of matchings (not nec essarily perfect) on a graph. This talk will concerned the disordered vers ion of this problem with additional environmental randomness\, the weights of the matchings are themselves random variables. The ground state of the model is a measure concentrated on matchings of minimal energy\, in other words the Gibbs measure at zero temperature. In this talk\, I will introd uce the model on the discrete torus. In joint work with Gourab Ray\, we es tablish the uniqueness in limit of the ground state as the lattice size te nds to infinity. This involves certain ergodic theoretic tools such as the Burton Keane argument. We use this uniqueness to establish a central limi t theorem for the ground state energy by applying Chatterjee’s powerful me thod of normal approximation.  DTSTART;TZID=America/Los_Angeles:20241014T143000 DTEND;TZID=America/Los_Angeles:20241014T153000 LAST-MODIFIED:20240927T224830Z LOCATION:SMI 405 SUMMARY:: Uniqueness and CLT for the ground state Disordered Monomer Dimer Model on mathbb Z d TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-14/uniqueness-and-clt-ground -state-disordered-monomer-dimer-model-mathbb-z-d END:VEVENT BEGIN:VEVENT UID:031ca792-bce1-4990-808a-6f7072f0d52b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241009T043532Z DESCRIPTION:Speaker: Lena Ji (UIUC)\n\n\n\n\n\nTitle preseminar: Rationalit y of varieties over non-closed fields\n\nAbstract preseminar: An algebraic variety over a field k is said to be k-rational if it admits a birational map to projective space over k. Determining the rationality of a variety is a classical problem\, especially when k is the complex numbers. When th e field k is not algebraically closed\, there are additional consideration s in the rationality problem\, coming from the arithmetic of k. In this ta lk\, we'll present examples of rational and non-rational varieties\, and w e'll see some obstructions to rationality.\n\n \n\nTitle seminar: Rational ity problems for linear spaces on pencils of quadrics\n\nAbstract seminar: The linear spaces contained in the base locus of a pencil of quadrics enc ode a lot of interesting geometry. For pencils of even-dimensional quadric s\, there is a deep relationship between these linear spaces and hyperelli ptic curves\, dating back to Weil. This has found numerous applications\, e.g. to rational points and to moduli spaces of sheaves on curves. In this talk\, we study rationality questions for the Fano schemes of these linea r spaces\, and we generalize some results of Reid\, Colliot-Thélène–Sansuc –Swinnerton-Dyer\, Hassett–Tschinkel\, Benoist–Wittenberg\, and Hassett–Ko llár–Tschinkel. This work is joint with Fumiaki Suzuki.\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241015T133000 DTEND;TZID=America/Los_Angeles:20241015T153000 LAST-MODIFIED:20241009T043532Z LOCATION:PDL C-38 SUMMARY:: Rationality problems for linear spaces on pencils of quadrics TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-15/rationality-problems-line ar-spaces-pencils-quadrics END:VEVENT BEGIN:VEVENT UID:2e6641cc-fe18-4027-b00d-4bc0b34ee4bd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240924T203835Z DESCRIPTION:Speaker: Scott Neville\, University of Michigan\n\nAbstract:\n \nQuivers and their mutations play a fundamental role in the theory of clu ster algebras. We focus on the problem of deciding whether two given quive rs are mutation equivalent to each other. Our approach is based on introdu cing an additional structure of a cyclic ordering on the set of vertices o f a quiver. This leads to new powerful invariants of quiver mutation. Thes e invariants can be used to show that various quivers are not mutation acy clic\, i.e.\, they are not mutation equivalent to an acyclic quiver. This talk is partially based on joint work with Sergey Fomin [arXiv:2406.03604] .\n\nNote: This talk begins with a pre-seminar (aimed at graduate students ) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https: //washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241016T153000 DTEND;TZID=America/Los_Angeles:20241016T170000 LAST-MODIFIED:20240930T235617Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Cyclically ordered quivers TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-16/cyclically-ordered-quiver s END:VEVENT BEGIN:VEVENT UID:355a387b-34fc-40c5-bdbb-355c1d24c75a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241014T175213Z DESCRIPTION:Speaker: Soham Ghosh\, University of Washington\n\nIn this talk I will provide a broad overview of the theory of Fourier-Mukai functors b etween derived categories and their geometric significance. I will also de scribe  the Fourier-Mukai theory for abelian varieties\, which will provid e a concrete example of non-isomorphic but derived equivalent varieties. DTSTART;TZID=America/Los_Angeles:20241016T161500 DTEND;TZID=America/Los_Angeles:20241016T171500 LAST-MODIFIED:20241014T175236Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp Fourier Mukai transforma tions TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-16/students-algebraic-geomet ry-seminar-nbsp-fourier-mukai-transformations END:VEVENT BEGIN:VEVENT UID:ba173cae-2526-4cec-8835-757b7254a697 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20241013T235144Z DESCRIPTION:Speaker: Garrett Mulcahy\, University of Washington\n\nThis tal k will present a novel discretization scheme for Wasserstein gradient flow s (i.e. curves of steepest descent for functions of probability measures) based on the successive computation of Schr\'{o}dinger bridges with equal marginals. Little background is assumed: just a little bit of measure theo ry. This talk will begin with a leisurely introduction to entropic regular ized optimal transport\, introducing all the notions essential for underst anding this scheme. Based on joint work with Soumik Pal\, Medha Agarwal\, and Zaid Harchaoui. \n\n  DTSTART;TZID=America/Los_Angeles:20241017T123000 DTEND;TZID=America/Los_Angeles:20241017T133000 LAST-MODIFIED:20241013T235903Z LOCATION:PDL C-401 SUMMARY:: GSAS Iterated Schr o dinger Bridge Approximation to Wasserstein G radient Flows nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-17/gsas-iterated-schr-o-ding er-bridge-approximation-wasserstein-gradient-flows-nbsp END:VEVENT BEGIN:VEVENT UID:b06b4afd-2199-462a-8fe4-d29c1bc1f18a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241007T232242Z DESCRIPTION:Speaker: Gabriel Paternain\n\nGeodesic X-ray transforms extend the classical Radon transform in the plane\, which involves integrating a function along straight lines—a concept fundamental to the mathematics beh ind CT scans. In this talk\, I will provide a broad introduction to these transforms\, highlighting their significance and widespread applications i n geometry\, dynamical systems\, and inverse problems. DTSTART;TZID=America/Los_Angeles:20241017T163000 DTEND;TZID=America/Los_Angeles:20241017T180000 LAST-MODIFIED:20241007T232344Z LOCATION:PDL C-038 SUMMARY:: Geodesic X ray transforms TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-17/geodesic-x-ray-transforms END:VEVENT BEGIN:VEVENT UID:dabfdcb5-aa52-4289-9521-c93ece14c147 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241016T210500Z DESCRIPTION:Speaker: Isaiah Siegl\n\nA matrix is totally non-negative (TNN) if all of the determinants of square submatrices are non-negative. Lindst rom's lemma gives a correspondence between TNN matrices and graphs that ca n be drawn in a disc\, with minors of the matrix corresponding to collecti ons of non-intersecting paths in the graph. I will show how Lindstrom's le mma can be used to give inequalities on the coefficients of polynomials wi th negative real roots. These inequalities then give Schur-positivity resu lts for symmetric functions obtained from polynomials with negative real r oots. DTSTART;TZID=America/Los_Angeles:20241018T143000 DTEND;TZID=America/Los_Angeles:20241018T153000 LAST-MODIFIED:20241016T210500Z LOCATION:PDL C-401 SUMMARY:: Back To School seminar nbsp Non Intersecting Paths and Real Roote d Polynomials TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-18/back-school-seminar-nbsp- non-intersecting-paths-and-real-rooted-polynomials END:VEVENT BEGIN:VEVENT UID:445af049-8d41-4f96-9926-a8b4166f7013 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20240920T202318Z DESCRIPTION:Speaker: Thomas Rothvoss\, University of Washington\n\nIn a sem inal paper\, Kannan and Lovász (1988) considered a quantity \$µ_{KL}(\Lamb da\,K)\$ which denotes the best volume-based lower bound on the covering r adius \$µ(\Lambda\,K)\$ of a convex body \$K\$ with respect to a lattice \ $\Lambda\$. Kannan and Lovász proved that \$µ(\Lambda\,K) \leq n \cdot µ_{ KL}(\Lambda\,K)\$ and the Subspace Flatness Conjecture by Dadush (2012) cl aims a \$O(\log n)\$ factor suffices\, which would match the lower bound f rom the work of Kannan and Lovász.\n\nWe settle this conjecture up to a co nstant in the exponent by proving that  \$µ(\Lambda\,K) \leq O(\log^{3}(n) ) \cdot µ_{KL} (\Lambda\,K)\$. Our proof is based on the Reverse Minkowski Theorem due to Regev and Stephens-Davidowitz (2017). Following the work o f Dadush (2012\, 2019)\, we obtain a \$(\log n)^{O(n)}\$-time randomized a lgorithm to solve integer programs in \$n\$ variables. Another implication of our main result is a near-optimal flatness constant of \$O(n \log^{3}( n))\$.\n \nThis is joint work with Victor Reis. DTSTART;TZID=America/Los_Angeles:20241018T153000 DTEND;TZID=America/Los_Angeles:20241018T163000 LAST-MODIFIED:20241014T205604Z LOCATION:ECE 125 SUMMARY:: The Subspace Flatness Conjecture and Faster Integer Programming TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-18/subspace-flatness-conject ure-and-faster-integer-programming END:VEVENT BEGIN:VEVENT UID:4f422ac5-57f2-48d0-88b8-203d4b092b3e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241008T233617Z DESCRIPTION:Speaker: Fang Han\, University of Washington\n\nIn this talk\, the speaker will provide an overview of the recent progress made in explor ing Sourav Chatterjee's newly introduced rank correlation. The objective i s to elaborate on its practical utility and present several new findings p ertaining to (a) the asymptotic normality and limiting variance of Chatter jee's rank correlation\, (b) its statistical efficiency for testing indepe ndence\, and (c) the issue of its bootstrap inconsistency. Notably\, the p resentation will reveal that Chatterjee's rank correlation is root-n consi stent\, asymptotically normal\, but bootstrap inconsistent - a rare phenom enon in the literature. DTSTART;TZID=America/Los_Angeles:20241021T143000 DTEND;TZID=America/Los_Angeles:20241021T153000 LAST-MODIFIED:20241015T235127Z LOCATION:SMI 405 SUMMARY:: Chatterjee s rank nbsp correlation what is new TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-21/chatterjee-s-rank-nbsp-co rrelation-what-new END:VEVENT BEGIN:VEVENT UID:0e08c045-5352-456a-89d3-14497a3b9e41 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240925T210743Z DESCRIPTION:Speaker: Friedrich Eisenbrand\, EPFL\n\nThe sum of square roots is the following problem: Given x1\, ...\, xn ∈ ℤ and a1\, ...\, an ∈ ℕ d ecide whether E = x1 √a1 + … + xn √an ≥ 0 It is a prominent open problem ( Problem 33 of the Open Problems Project)\, whether this can be decided in polynomial time. The state-of-the-art methods rely on separation bounds\, which are lower bounds on the minimum nonzero absolute value of the expres sion E. The current best lower bounds shows that doubly exponentially smal l (in n and the binary encoding lengths of the involved numbers). We provi de a new bound of the form |E| ≥ γ ⋅ (n ⋅ maxi |xi|)-2n where γ is a const ant depending on a1\, ...\, an. This is singly exponential in n for fixed a1\, ...\, an. The constant γ is not explicit and stems from the subspace theorem\, a deep result in the geometry of numbers. Joint work with Matthi eu Haeberle and Neta Singer.  DTSTART;TZID=America/Los_Angeles:20241021T153000 DTEND;TZID=America/Los_Angeles:20241021T163000 LAST-MODIFIED:20241009T180117Z LOCATION:CSE2 371 SUMMARY:: An improved bound on sums of square roots via the subspace theore m TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-21/improved-bound-sums-squar e-roots-subspace-theorem END:VEVENT BEGIN:VEVENT UID:49d3e05c-8cb3-4556-b381-3c58cbb498f9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241016T040018Z DESCRIPTION:Speaker: Wanlin Li\, Washington University in St. Louis \n\nThe Ceresa cycle and the Gross—Kudla—Schoen modified diagonal cycle are algeb raic 1-cycles associated to a smooth algebraic curve. They are algebraical ly trivial for a hyperelliptic curve and non-trivial for a very general co mplex curve of genus >2. Given an algebraic curve\, it is an interesting q uestion to study whether the Ceresa and GKS cycles associated to it are ra tionally or algebraically trivial. In this talk\, I will discuss some meth ods and tools to study this problem. DTSTART;TZID=America/Los_Angeles:20241022T110000 DTEND;TZID=America/Los_Angeles:20241022T115000 LAST-MODIFIED:20241016T040018Z LOCATION:PDL C-401 SUMMARY:: Non vanishing of Ceresa and Gross Kudla Schoen cycles TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-22/non-vanishing-ceresa-and- gross-kudla-schoen-cycles END:VEVENT BEGIN:VEVENT UID:135b306d-7146-40c4-bf9f-29212e210a83 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241017T222430Z DESCRIPTION:Speaker: Wern Yeong (UCLA)\n\n\n\n\n\nPre-seminar\n\nTitle: Not ions of hyperbolicity for complex algebraic varieties\n\nAbstract: Riemann surfaces can be classified as either parabolic\, elliptic\, or hyperbolic . In this pre-seminar\, we motivate and introduce several notions of hyper bolicity for complex algebraic varieties of any dimension\, e.g. Brody hyp erbolicity and log algebraic hyperbolicity\, and discuss some examples and non-examples.\n\n \n\nSeminar\n\nTitle: Hyperbolicity of the complement o f generic quartic plane curves\n\nAbstract: A complex algebraic variety is said to be Brody hyperbolic if it contains no entire curves\, which are n on-constant holomorphic images of the complex line. It is conjectured that varieties of (log) general type are hyperbolic outside of a proper subvar iety called an exceptional locus. The case of quartic plane curves has dra wn interest for decades. In two collaborations (with X. Chen and E. Riedl\ , and with K. Ascher and A. Turchet)\, we prove an algebraic version of th is conjecture for the complement of a very general quartic plane curve wit h DTSTART;TZID=America/Los_Angeles:20241022T133000 DTEND;TZID=America/Los_Angeles:20241022T153000 LAST-MODIFIED:20241017T222430Z LOCATION:PDL C-38 SUMMARY:: Hyperbolicity of the complement of generic quartic plane curves TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-22/hyperbolicity-complement- generic-quartic-plane-curves X-ALT-DESC;FMTTYPE=TEXT/HTML:Speaker: Wern Yeong (UCLA) Pre-seminar Title: Notions of hyperbolicity for complex algebraic varieties Abstract: Riemann surfaces can be classified as either parabolic\, elliptic\, or hyperbolic . In this pre-seminar\, we motivate and introduce several notions of hyper bolicity for complex algebraic varieties of any dimension\, e.g. Brody hyp erbolicity and log algebraic hyperbolicity\, and discuss some examples and non-examples.   Seminar Title: Hyperbolicity of the complement of generic quartic plane curves Abstract: A complex algebraic variety is said to be Brody hyperbolic if it contains no entire curves\, which are non-constant holomorphic images of the complex line. It is conjectured that varieties o f (log) general type are hyperbolic outside of a proper subvariety called an exceptional locus. The case of quartic plane curves has drawn interest for decades. In two collaborations (with X. Chen and E. Riedl\, and with K . Ascher and A. Turchet)\, we prove an algebraic version of this conjectur e for the complement of a very general quartic plane curve with <=2 compon ents. Moreover\, we completely characterize the exceptional locus for the complement of a very general irreducible quartic plane curve\, identifying it as the union of its flex and bitangent lines.   END:VEVENT BEGIN:VEVENT UID:a9f59df9-cd8d-46a9-ba65-0814c80d08bf DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240926T192021Z DESCRIPTION:Speaker: Joseph Fluegemann\, Cornell University\n\nAbstract:\n \nWe consider the Grassmannian \$Gr_{\mathbb C}(k\,n)\$\, a manifold param eterized by \$k\$-dimensional planes in complex \$n\$-dimensional space. T he Schubert decomposition of the Grassmannian is perhaps the classic way t o split this space into smaller pieces. Positroid varieties provide a fine r stratification of this space\, combinatorially indexed by a special type of permutation called a bounded affine permutation. We can draw these bou nded affine permutations using diagrams called affine pipe dreams. We will show that the number of such diagrams is actually connected to the questi on of whether certain points of these positroid varieties are smooth or si ngular. The proof uses the AJS/Billey formula. We further give a character ization of an affine pipe dream that corresponds to a smooth point\, and t his characterization can also be applied to study smoothness of Schubert v arieties. In fact\, if we consider the pairs (Positroid Variety\, Point)\, we can put a partial ordering on all the pairs\, and study smoothness in the context of this ordering.\n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10. \n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMeeting I D: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241023T153000 DTEND;TZID=America/Los_Angeles:20241023T170000 LAST-MODIFIED:20240930T044728Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Smooth Points on Positroid Varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-23/smooth-points-positroid-v arieties END:VEVENT BEGIN:VEVENT UID:5cea7193-f934-47e4-b4d6-5ee21f0742c2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241018T090311Z DESCRIPTION:Speaker: Arkamouli Debnath\, University of Washington \n\nNow t hat we have seen the basics of derived and triangulated categories in the previous lectures of the seminar\, we shall move ahead with using these to understand the geometry of our schemes in context. One of the most import ant tools for this is what is called an exceptional object. Exceptional ob jects and semiorthogonal decomposition help us find smaller pieces in our triangulated categories which act as building blocks. They can also detect various properties of a scheme such as whether it is Fano or what its gen us is if it is a curve etc. \nTime permitting I will show the explicit sem i orthogonal decomposition of the bounded derived category of projective s pace.  DTSTART;TZID=America/Los_Angeles:20241023T161500 DTEND;TZID=America/Los_Angeles:20241023T171500 LAST-MODIFIED:20241018T090311Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar Exceptional Objects and Semi Orthogonal Decomposition TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-23/students-algebraic-geomet ry-seminar-exceptional-objects-and-semi-orthogonal END:VEVENT BEGIN:VEVENT UID:b2d7ee34-dc8e-4aba-b35c-1f0db760808f DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20241021T050920Z DESCRIPTION:Speaker: Linhang Huang\, University of Washington\n\nDendrite ( tree-like) Julia sets represent an important family of Julia sets correspo nding to the boundary of the Mandelbrot set. It is well-known that this fa mily can be parametrized using the unit circle. In this talk\, I will show how to translate geometric problems associated with Julia sets into more trackable combinatorial criteria for points on the unit circle. In doing s o\, we are able to conclude some specific geometric properties for dendrit e Julia sets. DTSTART;TZID=America/Los_Angeles:20241024T123000 DTEND;TZID=America/Los_Angeles:20241024T133000 LAST-MODIFIED:20241021T051041Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Combinatoric Conditions for the Geometry of Julia Sets TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-24/gsas-nbsp-combinatoric-co nditions-geometry-julia-sets END:VEVENT BEGIN:VEVENT UID:0551723c-3ce2-461b-a932-3d705a2db4f7 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20241021T215607Z DESCRIPTION:Speaker: Jackson Morris\n\nAdvisor: John Palmieri DTSTART;TZID=America/Los_Angeles:20241024T143000 DTEND;TZID=America/Los_Angeles:20241024T153000 LAST-MODIFIED:20241021T215720Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-24/general-exam END:VEVENT BEGIN:VEVENT UID:d3ccb648-3f3c-4574-8367-0283d023f417 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241018T212535Z DESCRIPTION:Speaker: Dan Mikulincer\n\nThe talk will introduce some statist ical problems with a high-dimensional flavor. We will then explain how to approach such problems by finding universal sources of randomness. The pro blems we shall care about include on one hand detecting geometry in random geometry graphs and on the other hand approximation of random neural netw orks. DTSTART;TZID=America/Los_Angeles:20241024T163000 DTEND;TZID=America/Los_Angeles:20241024T180000 LAST-MODIFIED:20241018T212535Z LOCATION:PDL C-038 SUMMARY:: Universality in high dimensional probability TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-24/universality-high-dimensi onal-probability END:VEVENT BEGIN:VEVENT UID:54381645-2531-484e-b373-205e72c96635 DTSTAMP:20260617T145208Z CATEGORIES:Meetings\, Seminars CLASS:PUBLIC CREATED:20241014T213458Z DESCRIPTION:The Twenty Fourth Northwest Probability Seminar is a mini-confe rence held at the University of Washington and organized with the support of the University of Oregon\, Oregon State University\, Pacific Institute for the Mathematical Sciences (PIMS)\, Baidu\, University of Washington (F riends of Mathematics Fund)\, and the Milliman Fund.\n\nThe Scientific Com mittee for the NW Probability Seminar 2023 consists of Omer Angel (U Briti sh Columbia)\, Chris Burdzy (U Washington)\, Zhenqing Chen (U Washington)\ , David Levin (U Oregon) and Axel Saenz Rodríguez (Oregon State U).\n\nFul l schedule on the Pacific Northwest Probability Seminar website.\n\n  DTSTART;TZID=America/Los_Angeles:20241026T100000 DTEND;TZID=America/Los_Angeles:20241026T172000 LAST-MODIFIED:20241014T215016Z LOCATION:Mary Gates Hall 241 SUMMARY:: The Twenty Fourth Northwest Probability Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-26/twenty-fourth-northwest-p robability-seminar END:VEVENT BEGIN:VEVENT UID:99fff2f1-0e60-489c-9cab-69a2be1ce673 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241025T151239Z DESCRIPTION:Speaker: Alex Wang\n\nWhen looking for rational points on varie ties\, we can often disprove the existence of solutions by checking variou s positivity or modular arithmetic conditions.  However\, even if we pass all of these checks\, we could still fail to have rational points! In this talk\, we'll explore the Brauer-Manin obstruction as a way to explain the absence of rational points.  We'll also discuss my ongoing project to pro ve the local-to-global principle of certain special del Pezzo surfaces of degree 2. DTSTART;TZID=America/Los_Angeles:20241026T143000 DTEND;TZID=America/Los_Angeles:20241026T153000 LAST-MODIFIED:20250312T163155Z LOCATION:PDL C-401 SUMMARY:: Back To School Seminar The Brauer Manin obstruction on del Pezzo surfaces of degree 2 TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-26/back-school-seminar-braue r-manin-obstruction-del-pezzo-surfaces-degree-2 END:VEVENT BEGIN:VEVENT UID:9f0e88fe-9ea0-4251-b923-6274af15b32a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241004T204858Z DESCRIPTION:Speaker: Donald Stull (University of Chicago)\n\n In the first part of this talk\, we introduce the algorithmic techniques that have rece ntly been used in several areas of geometric measure theory. In particular \, we will introduce the concepts of Kolmogorov complexity and effective d imension. We will describe the 'point-to-set principle'\, which relates th e algorithmic theory with Hausdorff dimension. \n\nIn the second part of t his talk\, we discuss a recent application of the algorithmic techniques t o projection theorems in geometric measure theory. Marstrand’s projection theorem states that\, for any analytic \, for almost every direction \, th e Hausdorff dimension of the orthogonal projection of  onto \, \, is maxim al. A natural question is whether there are non-trivial subsets of directi ons that work for every (analytic) set . We call such a set of directions universal. Surprisingly\, universal sets exist. We prove the existence of universal sets using techniques from computability theory\, and\, in parti cular\, effective dimension. This is joint work with Jacob Fiedler. DTSTART;TZID=America/Los_Angeles:20241029T133000 DTEND;TZID=America/Los_Angeles:20241029T153000 LAST-MODIFIED:20241022T235012Z LOCATION:PDL C-401 SUMMARY:: Algorithmic methods in geometric measure theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-29/algorithmic-methods-geome tric-measure-theory END:VEVENT BEGIN:VEVENT UID:5b4cdef2-593c-40f4-b55a-f3f1cd9ec646 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240924T203934Z DESCRIPTION:Speaker: Elena Hafner\, University of Washington\n\nAbstract:\n \nThe central question of knot theory is that of distinguishing links up t o isotopy.  The first polynomial invariant of links devised to help answer this question was the Alexander polynomial (1928).  Almost a century afte r its introduction\, it still presents us with tantalizing problems\, such as Fox's conjecture (1962) that the absolute values of the coefficients o f the Alexander polynomial \$\Delta_L(t)\$ of an alternating link \$L\$ ar e unimodal.  Fox's conjecture remains open in general with special cases s ettled by Hartley (1979) for two-bridged knots\, by Murasugi (1985) for a family of alternating algebraic links\, and by Ozsv\'ath and Szab\'o (2003 ) for the case of genus 2 alternating knots\, among others.  We settle Fox 's conjecture for special alternating links.  We do so by proving that a c ertain multivariate generalization of the Alexander polynomial of special alternating links is Lorentzian.  As a consequence\, we obtain that the ab solute values of the coefficients of \$\Delta_L(t)\$\, where \$L\$ is a sp ecial alternating link\, form a log-concave sequence with no internal zero s.  In particular\, they are unimodal.  This talk is based on joint work w ith Karola Mészáros and Alex Vidinas.\n\nNote: This talk begins with a pre -seminar (aimed at graduate students) at 3:30–4:00. The main talk starts a t 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMe eting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241030T153000 DTEND;TZID=America/Los_Angeles:20241030T170000 LAST-MODIFIED:20241011T000405Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Log Concavity of the Alexander Polynomial for Special Alternating Links TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-30/log-concavity-alexander-p olynomial-special-alternating-links END:VEVENT BEGIN:VEVENT UID:a67a06fc-5086-4ba6-b5d3-963cfd7d3e9e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241024T071651Z DESCRIPTION:Speaker: Ting Gong\, University of Washington \n\nWe are going to give definition of the twisted derived categories\, tie it to the study of Brauer group and Hodge theory\, which\, just like derived categories\, captures intrinsic properties of the base scheme. We state results of see king a twisted derived Torelli theorem.  DTSTART;TZID=America/Los_Angeles:20241030T161500 DTEND;TZID=America/Los_Angeles:20241030T171500 LAST-MODIFIED:20241024T071709Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp Brauer group and twisted derived categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-30/students-algebraic-geomet ry-seminar-nbsp-brauer-group-and-twisted-derived END:VEVENT BEGIN:VEVENT UID:0b3b170e-beee-453b-8c3a-a878f79bf4a8 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20241029T212745Z DESCRIPTION:Speaker: Begoña García Malaxechebarría\n\nWe develop a framewor k for analyzing the training and learning rate dynamics on a large class o f high-dimensional optimization problems\, which we call the high line\, t rained using one-pass stochastic gradient descent (SGD) with adaptive lear ning rates. We give exact expressions for the risk and learning rate curve s in terms of a deterministic solution to a system of ODEs. We then invest igate in detail two adaptive learning rates – an idealized exact line sear ch and AdaGrad-Norm – on the least squares problem. When the data covarian ce matrix has strictly positive eigenvalues\, this idealized exact line se arch strategy can exhibit arbitrarily slower convergence when compared to the optimal fixed learning rate with SGD. Moreover we exactly characterize the limiting learning rate (as time goes to infinity) for line search in the setting where the data covariance has only two distinct eigenvalues. F or noiseless targets\, we further demonstrate that the AdaGrad-Norm learni ng rate converges to a deterministic constant inversely proportional to th e average eigenvalue of the data covariance matrix\, and identify a phase transition when the covariance density of eigenvalues follows a power law distribution. DTSTART;TZID=America/Los_Angeles:20241031T123000 DTEND;TZID=America/Los_Angeles:20241031T133000 LAST-MODIFIED:20241029T212745Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp High Dimensional Limit of SGD Dynamics via a System of ODEs TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-10-31/gsas-nbsp-high-dimensiona l-limit-sgd-dynamics-system-odes END:VEVENT BEGIN:VEVENT UID:0bb6aab7-af23-4d85-914a-bb3afb0bcf9e DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20241031T004543Z DESCRIPTION:Speaker: Mal Dolorfino\n\n The fundamental correspondence for G alois extensions in algebra and Galois covers in topology are nearly ident ical\, and the similarities between these two theories run deep. In this t alk\, we explore the deeper connections between Galois extensions and Galo is covers\, and we use this to motivate the definition of the étale fundam ental group for algebraic curves. DTSTART;TZID=America/Los_Angeles:20241101T143000 DTEND;TZID=America/Los_Angeles:20241101T153000 LAST-MODIFIED:20250312T163141Z LOCATION:PDL C-401 SUMMARY:: Back to School seminar nbsp Galois groups fundamental groups and the tale fundamental group TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-01/back-school-seminar-nbsp- galois-groups-fundamental-groups-and-tale-fundamental END:VEVENT BEGIN:VEVENT UID:9e6393bb-a995-4357-8907-451c08d98cdf DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20240904T203348Z DESCRIPTION:Speaker: Persi Diaconis\, Stanford University\n\nJoint Colloqui um with UW Statistics and the Paul G. Allen School of Computer Science & E ngineering\n\nThe computer is taking over. AND\, in many branches of appli ed mathematics and statistics we hear 'why bother to prove theorems? simul ations and numerical approximation are easier and better for real problems '. NOT SO FAST\;\nI will present a collection of real world examples where the computer lies and thousands of hours of simulations give persistently wrong results. On the other hand\, we theorem provers can prove useless\, irrelevant things that choke off research and really do miss the interest ing stuff. There is room for both of us\, and there are interesting things to think about.\n\nA live stream of the talk will be made available one h our prior to the event. DTSTART;TZID=America/Los_Angeles:20241101T153000 DTEND;TZID=America/Los_Angeles:20241101T163000 LAST-MODIFIED:20241101T203742Z LOCATION:Amazon Auditorium (Gates G20) SUMMARY:: THE VALUE AND PITFALLS OF PROOF TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-01/value-and-pitfalls-proof END:VEVENT BEGIN:VEVENT UID:ac8eaa59-db59-4980-ab7f-da281dadf330 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241021T175432Z DESCRIPTION:Speaker: Soumik Pal\, University of Washington\n\nThe Sinkhorn or the Iterated Proportional Fitting Procedure (IPFP) algorithm is a funda mental\niterative algorithm with many uses in statistics and other areas o f applications. For example\, it\ncan be used to approximately compute an optimal transport coupling between two probability\nmeasures. However\, mu ch of its behavior is still shrouded in mystery. We will talk about limit of\nthe iterates\, as the temperature goes to zero\, as an absolutely cont inuous curve on the\nWasserstein space that has three equivalent descripti ons. One\, it is a gradient flow of relative\nentropy for a modified Wasse rstein geometry. Two\, it is the family of marginal distributions of a\nno vel family of diffusions. And\, three\, the family of measures can be gene rated by solutions of\nthe parabolic Monge-Ampere PDE. We will introduce t his novel family of flows and related\nstochastic processes and PDEs and t alk about their properties including their rates to\nequilibrium.\n\n\nBas ed on joint work with Nabarun Deb\, Young-Heon Kim and Geoff Schiebinger DTSTART;TZID=America/Los_Angeles:20241104T143000 DTEND;TZID=America/Los_Angeles:20241104T153000 LAST-MODIFIED:20241021T175432Z LOCATION:SMI 405 SUMMARY:: Wasserstein mirror gradient flows and the low temperature limit o f the Sinkhorn algorithm TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-04/wasserstein-mirror-gradie nt-flows-and-low-temperature-limit-sinkhorn-algorithm END:VEVENT BEGIN:VEVENT UID:476f75e7-628c-428a-b068-9bbf8550b953 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241031T213727Z DESCRIPTION:Speaker: Brian Nugent (UW)\n\n\n\n\n\nPre-talk Title: The Picar d Scheme\n\nAbstract: The set of all line bundles on a variety form a grou p known as the Picard group. Like with many objects in algebraic geometry\ , the Picard group can be given a scheme structure in which it parametrize s families of line bundles on X\, this is called the Picard scheme. In thi s pre-talk\, we will discuss the basic properties of the Picard scheme lik e its dimension\, smoothness\, connected components\, etc.\n\n \n\nTitle: Moduli of Very Ample Line Bundles\n\nAbstract: A line bundle is very ample if the map into projective space that it defines is an embedding. Given t hat there is a moduli space for all line bundles\, the Picard scheme\, it is natural to ask if there is a moduli space of very ample line bundles. W e will discuss some complications that arise from very ampleness not being a locally closed property and show how we can modify the moduli problem t o fix this.\n\n \n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241105T133000 DTEND;TZID=America/Los_Angeles:20241105T153000 LAST-MODIFIED:20241031T213727Z LOCATION:PDL C-38 SUMMARY:: Moduli of Very Ample Line Bundles TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-05/moduli-very-ample-line-bu ndles END:VEVENT BEGIN:VEVENT UID:9b1accb1-36a7-4dd5-afff-dfe06a3a6e00 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20240610T223519Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n Committee Reports\n \n Undergraduate Program - Thomas\n Graduate Program - Zhu & Lieblich\n \n \n New Business\n Executive Session\n Adjournment\n\n\n\n \nMINUTES\n\nThe regular meeting of the faculty of the Department of Mathe matics was held virtually via Zoom at 3:30pm PST\, November 5\, 2024. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.\n\nChair's Remarks\n\nThe course assignment sheet requests have been modified to focus more on ascertaining teaching interests rather tha n solely scheduling preferences. One of the long-term goals is to get the tenure-track faculty to three courses per year while broadening the range of courses on offer to students and nurturing a more dynamic department.\n \nEmail groups have been created for the various committees within the dep artment. They are linked to the committee names on the “Departmental Users ” page.\n\nThe Acting Assistant Professor search is live and the descripti on of the position has been updated to better convey the terms of the appo intment.\n\nThere are three teaching-track reappointment cases that requir e the attention of eligible voting faculty to review and vote on by this F riday. An email with links to the files and voting form have gone out to t he relevant faculty. \nThe previous meeting’s minutes were approved by una nimous consent.\n\nDue to a recent change in the Faculty Code\, Department al Chairs may no longer be delegated to make temporary faculty hiring deci sions nor serve on committees handling these decisions. Therefore\, the Ch air has proposed delegating this responsibility for this year to the Progr am Committee consisting of Julia Pevtsova\, Rekha Thomas\, and Sarah Garne r who will then advise the Chair. The motion was carried\, passed\, and ap proved.\n\nThe proposed 2025 departmental meeting schedule was shared\, ad justed\, then approved.\n\nAnnouncements\n\nThe Graduate Student Represent ative invited faculty to give a Current Topics Seminar talk this Winter qu arter. These talks run 40 to 50 minutes long with a Q&A followed by pizza. It’s a good opportunity for early career students to learn more about the faculty and their current research.\n\nCommittee Reports\n\nThe Undergrad uate Program Committee encouraged faculty to sign up for 3xx and 4xx class es. Although a few of these courses have been revamped recently\, there ar e still some that could benefit from a fresh perspective. If you have any ideas for cool topics to be taught at the undergraduate level\, please sen d them to the committee.\n\nThe UPC proposes removing the calculus prerequ isite for Math 208 (Linear Algebra). A motion was passed\, voted on\, and approved.\n\nThe Graduate Program Committee proposes creating a new course \, MATH 598 (Writing\, Research\, Mathematics) worth 1 credit\, to help co dify the writing milestone as a formal course on transcripts. This would g o into effect in the next quarter or so. A motion was passed\, voted on\, and approved.\n\nIn order for faculty to chair graduate student committees \, they must be appointed to the graduate faculty. Two separate motions we re passed to vote Giovanni Inchiostro and Dan Mikulincer into the graduate faculty. Votes were held\, passed\, and approved.\n\nNew Business\n\nFacu lty are encouraged to join WXML. You’ll be presented with opportunities to engage more closely with undergraduates on small group projects. Please c ontact Chris Hoffman if you are interested.\n\nIf you have anything you’d like to discuss or bring to the Faculty Senate\, please contact Farbod Sho krieh. Your input is greatly appreciated.\n\nMax Lieblich is now a member of the Faculty Council in charge of interpreting the Faculty Code. If you have any questions or proposals for the Council\, please reach out to him. \n\nThe selection committee for the student awards is making a last call f or nominations for the TA Excellence in Teaching Awards. Please send nomin ations to Julia Pevtsova or Andy Loveless.\n\nADJOURNMENT\n\nThe meeting p assed into executive session at 4:21pm. DTSTART;TZID=America/Los_Angeles:20241105T153000 DTEND;TZID=America/Los_Angeles:20241105T163000 LAST-MODIFIED:20241126T001142Z LOCATION:via Zoom SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-05/faculty-meeting END:VEVENT BEGIN:VEVENT UID:1bd28723-e611-452b-867f-987f4eb4b209 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241004T184133Z DESCRIPTION:Speaker: Jeremy Martin\, University of Kansas\n\nAbstract:\n\nR ichard Stanley asked in 1995 whether a tree is determined up to isomorphis m by its chromatic symmetric function.  This question remains unanswered a nd frequently keeps the speaker awake at night.  Our approach to understan ding the strength of the chromatic symmetric function as an invariant is t o ask what other information is encoded in it.  First\, we prove Crew’s co njecture that the chromatic symmetric function of a tree determines its ge neralized degree sequence\, which enumerates vertex subsets by cardinality and the numbers of internal and external edges.  Second\, we prove that t he restriction of the generalized degree sequence to subtrees contains exa ctly the same information as the subtree polynomial\, which enumerates sub trees by cardinality and number of leaves. Third\, we construct arbitraril y large families of trees sharing the same subtree polynomial\, proving an d generalizing a conjecture of Eisenstat and Gordon.  This is joint work w ith José Aliste-Prieto\, Jennifer Wagner\, and José Zamora.\n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoo m.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241106T153000 DTEND;TZID=America/Los_Angeles:20241106T170000 LAST-MODIFIED:20241027T063551Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Chromatic Symmetric Functions and Polynomial Invariants of Trees TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-06/chromatic-symmetric-funct ions-and-polynomial-invariants-trees END:VEVENT BEGIN:VEVENT UID:47534305-fa7b-419a-8157-288ca7a9bb3e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241101T201010Z DESCRIPTION:Speaker: Leopold Mayer\, University of Washington \n\nWe sketch the proof of Orlov's formula for the derived category of a blowup. We pro ve a theorem of Kawatani\, Lin\, and Okawa about indecomposibility of deri ved categories of certain varieties. We give an example of how semiorthogo nal decompositions do not satisfy the Jordan-Holder property. DTSTART;TZID=America/Los_Angeles:20241106T161500 DTEND;TZID=America/Los_Angeles:20241106T171500 LAST-MODIFIED:20241101T201219Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp Structure of Semiorthogo nal Decompositions TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-06/students-algebraic-geomet ry-seminar-nbsp-structure-semiorthogonal-decompositions END:VEVENT BEGIN:VEVENT UID:f11417ab-de4b-4ea5-ad56-adec7c75be58 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20241104T052133Z DESCRIPTION:Speaker: Sebastián Muñoz-Thon\, Purdue University\n\nThe anisot ropic Calderón's problem asks to what extent the Dirichlet-to-Neumann (DN) map of the Dirichlet problem for the Laplace-Beltrami equation determines the metric on a Riemannian manifold. I will review some classic results\, in addition to some recent results for the analogous problem for minimal surfaces. Finally\, I will present recent progress on the analogous proble m for harmonic maps between Riemannian manifolds: the DN map for the Diric hlet problem for harmonic maps determines the metrics of both\, the domain and the codomain\, in certain cases. DTSTART;TZID=America/Los_Angeles:20241107T123000 DTEND;TZID=America/Los_Angeles:20241107T133000 LAST-MODIFIED:20241104T052227Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp A Calder n s problem for harmonic maps TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-07/gsas-nbsp-calder-n-s-prob lem-harmonic-maps END:VEVENT BEGIN:VEVENT UID:500ecfa3-8649-4c80-87f1-633ce4ca63fd DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20241008T154023Z DESCRIPTION:Speaker: Giovanni Inchiostro (and possibly others)\n\nThis even t is aimed at graduate students who are entering the research-focused phas e of the PhD program. We will share our experiences on how to transition i nto research and the role and choice of an advisor. We will discuss how to use your research time effectively and how to prepare for the general exa m and the thesis defense. This talk will focus on general advice and encou ragement. All are welcome to attend\, ask questions\, and share their expe riences.\n\nThis event is cross listed with the Current Topics Seminar. DTSTART;TZID=America/Los_Angeles:20241107T163000 DTEND;TZID=America/Los_Angeles:20241107T173000 LAST-MODIFIED:20241008T154236Z LOCATION:PDL C-38 SUMMARY:: Transition into Research TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-07/transition-research END:VEVENT BEGIN:VEVENT UID:eded8709-f908-4567-b87d-a827db69b03f DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20241028T213716Z DESCRIPTION:Speaker: Begoña García Malaxechebarría\n\nAdvisor: Dima Drusvya tskiy DTSTART;TZID=America/Los_Angeles:20241108T110000 DTEND;TZID=America/Los_Angeles:20241108T120000 LAST-MODIFIED:20241028T213822Z LOCATION:Clark Hall\, CLK 120 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-08/general-exam END:VEVENT BEGIN:VEVENT UID:6a4f89bd-cee6-487d-a388-ac0a89358a7a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241106T222914Z DESCRIPTION:Speaker: Jackson Morris\n\nThere is a rich two-way connection b etween algebraic geometry and homotopy theory. In this talk\, we will high light how each of these fields can help the other. We will start by invest igating complex-oriented cohomology theories and motivic homotopy theory\, before moving into two key examples: A^1 enumerative geometry and algebra ic K-theory. DTSTART;TZID=America/Los_Angeles:20241108T143000 DTEND;TZID=America/Los_Angeles:20241108T153000 LAST-MODIFIED:20250312T163124Z LOCATION:PDL C-401 SUMMARY:: Back to School seminar Interactions between algebraic geometry an d homotopy theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-08/back-school-seminar-inter actions-between-algebraic-geometry-and-homotopy-theory END:VEVENT BEGIN:VEVENT UID:7379d17c-617b-4c80-8703-d7c998e83bb1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241023T024441Z DESCRIPTION:Speaker: Adrian KC Lee DTSTART;TZID=America/Los_Angeles:20241108T153000 DTEND;TZID=America/Los_Angeles:20241108T170000 LAST-MODIFIED:20241216T212958Z LOCATION:ECE 125 SUMMARY:: Y Math Y Math Y Math TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-08/y-math-y-math-y-math END:VEVENT BEGIN:VEVENT UID:57c3bcea-8842-4fba-98d1-5cc348062a81 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241106T222641Z DESCRIPTION:Speaker: David Benson (University of Aberdeen)\n\n\n\n\n\nPre-t alk Title: Calculating cohomology.\n\nAbstract: I'll talk about how to cal culate cohomology of finite dimensional algebras\, especially self-injecti ve algebras\, and what it's good for.\n\nTitle talk: The nilCoxeter algebr as and their cohomology.\n\nAbstract talk: Given a Coxeter group\, there i s an associated nilCoxeter algebra given by replacing the generators squar ing to one by generators squaring to zero\, but keeping the remaining brai d relations. This is a local algebra\, so it makes sense to ask for the st ructure of Ext of the trivial module. This is a very interesting non-commu tative semiprime polynomial identity ring given by explicit generators and quadratic relations. It's related to some groups called cactus groups\, v ia Koszul duality.\n\n \n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241112T133000 DTEND;TZID=America/Los_Angeles:20241112T153000 LAST-MODIFIED:20241106T222641Z LOCATION:PDL C-38 SUMMARY:: The nilCoxeter algebras and their cohomology TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-12/nilcoxeter-algebras-and-t heir-cohomology END:VEVENT BEGIN:VEVENT UID:06486bf8-55e8-409e-9069-efc293a5853d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240924T204057Z DESCRIPTION:Speaker: Foster Tom\, Massachusetts Institute of Technology\n\n Abstract:\n\nWe prove a new signed elementary symmetric function expansion of the chromatic symmetric function. We then use sign-reversing involutio ns to prove \$e\$-positivity for graphs formed by joining cycles or clique s at single vertices. By considering connected partitions\, we prove non-\ $e\$-positivity for all trees that have either a vertex of degree at least five\, or a vertex of degree four that is not adjacent to a leaf. We also prove that spiders with four legs are not \$e\$-positive.\n\nNote: This t alk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. T he main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom .us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241113T153000 DTEND;TZID=America/Los_Angeles:20241113T170000 LAST-MODIFIED:20241017T220425Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: On e positivity of the chromatic symmetric function TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-13/e-positivity-chromatic-sy mmetric-function END:VEVENT BEGIN:VEVENT UID:129b94fa-6cb7-4fd6-b015-e02a72c50e77 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241112T044437Z DESCRIPTION:Speaker: Sándor Kovács (University of Washington)\n\nI will dis cuss a few examples of using derived categories in the study of singularit ies and birational geometry. In particular\, how derived categories allow us to extend vanishing theorems for singular varieties.  DTSTART;TZID=America/Los_Angeles:20241113T161500 DTEND;TZID=America/Los_Angeles:20241113T171500 LAST-MODIFIED:20241112T044448Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp Singularities and Vanish ing Theorems TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-13/students-algebraic-geomet ry-seminar-nbsp-singularities-and-vanishing-theorems END:VEVENT BEGIN:VEVENT UID:e0de7e5c-2f2c-4028-b099-dacb1fa36a7f DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20241112T000112Z DESCRIPTION:Speaker: Vasily Ilin\, University of Washington\n\nHow do you t rain an infinite neural network? I will show the dynamics of gradient desc ent optimization in the over-parameterized limit\, with the application to infinite-width neural networks. I will show how to unify the two standard approaches to infinite NN: mean-field limit and neural tangent kernel. Ge t your functional analysis muscles warmed up\, because they will do some h eavy lifting! DTSTART;TZID=America/Los_Angeles:20241114T123000 DTEND;TZID=America/Los_Angeles:20241114T133000 LAST-MODIFIED:20241112T000112Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp How to train your network TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-14/gsas-nbsp-how-train-your- network END:VEVENT BEGIN:VEVENT UID:b716d451-96de-48a4-a4fb-1ad11623a936 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241112T161403Z DESCRIPTION:Speaker: Alexis Drouot\n\nTopological insulators are striking q uantum materials which block electricity in their interior but support rob ust currents along their boundary. The bulk-edge correspondence is a physi cal principle that expresses the conductance of the boundary in terms of a bulk topological invariant. We will give a state-of-the-art review of the subject\, including recent results in collaboration with our postdoc Xiao wen Zhu. DTSTART;TZID=America/Los_Angeles:20241114T163000 DTEND;TZID=America/Los_Angeles:20241114T180000 LAST-MODIFIED:20241114T012429Z SUMMARY:: Mathematical results on topological insulators TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-14/mathematical-results-topo logical-insulators END:VEVENT BEGIN:VEVENT UID:e8099a1a-a3fd-47c3-b20c-ba825b84420f DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20241114T183903Z DESCRIPTION:Speaker: Jay Reiter\n\nStructured bordism classes of manifolds form a ring—but which ring? In this talk\, we will see how answering this question is actually a homotopical problem. The process of translation fro m geometric topology to homotopy theory is as exciting as the final result : our M.O. will be a tour of classifying spaces\, Thom spectra\, and many\ , many pairs of pants. DTSTART;TZID=America/Los_Angeles:20241115T143000 DTEND;TZID=America/Los_Angeles:20241115T153000 LAST-MODIFIED:20250312T163109Z LOCATION:PDL C-401 SUMMARY:: Back to School seminar nbsp Computing bordism rings with homotopy theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-15/back-school-seminar-nbsp- computing-bordism-rings-homotopy-theory END:VEVENT BEGIN:VEVENT UID:e9d9c112-d30e-430b-981d-2ecb7ee9f648 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20240904T210607Z DESCRIPTION:Speaker: Semyon Dyatlov\, Massachusetts Institute of Technology \n\nAnosov flows are a standard model for strongly chaotic behavior in dyn amical systems. A classical example is the geodesic flow on a compact nega tively curved Riemannian manifold. The chaotic behavior of an Anosov flow manifests in decay of correlations and in the exponential growth of the nu mber of closed trajectories.\n\nThis talk is about Pollicott-Ruelle resona nces\, which are the complex characteristic frequencies featured in long t ime asymptotic behavior of correlations. They also appear as singularities of dynamical zeta functions\, defined as Euler products over the lengths of closed trajectories. This subject has a long history going back to the 1960s but in the past 15 years many new results have been proved using an approach based on microlocal analysis and scattering theory. Among these r esults I will discuss in particular meromorphic continuation of zeta funct ions and their connections to topology. DTSTART;TZID=America/Los_Angeles:20241115T153000 DTEND;TZID=America/Los_Angeles:20241115T163000 LAST-MODIFIED:20241112T172923Z LOCATION:ECE 125 SUMMARY:: Dynamical zeta functions for Anosov flows TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-15/dynamical-zeta-functions- anosov-flows END:VEVENT BEGIN:VEVENT UID:f4998ab8-0452-42a8-9e8b-54d3a46b5720 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241030T161458Z DESCRIPTION:Speaker: Ritwik Sadhu\, University of Washington\n\nIn this tal k\, we will explore statistical inference for the optimal transport (OT) m ap (also known as the Brenier map) from a known absolutely continuous refe rence distribution onto an unknown finitely discrete target distribution. This includes limit distributions for the \$L^p\$-error with arbitrary \$p \in [1\,\infty)\$ and for linear functionals of the empirical OT map\, to gether with their moment convergence\, and consistency of the nonparametri c bootstrap. The derivation of our limit theorems relies on new stability estimates of functionals of the OT map with respect to the dual potential vector\, which may be of independent interest. I will discuss applications of our limit theorems to the construction of confidence sets for the OT m ap and inference for a maximum tail correlation. Connections to the entrop ic optimal transport problem (EOT) in the semi-discrete will also be explo red.\n\n  DTSTART;TZID=America/Los_Angeles:20241118T143000 DTEND;TZID=America/Los_Angeles:20241118T153000 LAST-MODIFIED:20241030T161458Z LOCATION:SMI 405 SUMMARY:: Stability and statistical inference for semi discrete optimal tra nsport TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-18/stability-and-statistical -inference-semi-discrete-optimal-transport END:VEVENT BEGIN:VEVENT UID:790f560f-de5f-48a9-b86f-782d1ba27b27 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241114T161101Z DESCRIPTION:Speaker: John Yin\, Ohio State University\n\nI will present an analog of the Chebotarev Density Theorem which works over local fields. As an application\, I will use it to prove a conjecture of Bhargava\, Cremon a\, Fisher\, and Gajović. This is joint work with Asvin G and Yifan Wei. DTSTART;TZID=America/Los_Angeles:20241119T110000 DTEND;TZID=America/Los_Angeles:20241119T115000 LAST-MODIFIED:20241114T161101Z LOCATION:PDL C-401 SUMMARY:: A Chebotarev Density Theorem over Local Fields TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-19/chebotarev-density-theore m-over-local-fields END:VEVENT BEGIN:VEVENT UID:a65198b9-48bb-45ef-bccf-641483b204ef DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241108T214446Z DESCRIPTION:Speaker: Nicolas Addington (University of Oregon)\n\n\n\n\n\nPr e-talk: Cohomology of hypersurfaces\nTitle: In the main talk I'll discuss some hard questions about the cohomology of a smooth hypersurface X in CP^ {n+1}\, so in the pre-talk I'll discuss what's easy\, or at least classica l. The Lefschetz hyperplane theorem gives everything but the middle cohomo logy H^n(X\,Z). The Hirzebruch-Riemann-Roch formula gives the Hodge number s and thus the rank of H^n(X\,Z).  Griffiths' residue calculus gives the a ction of the automorphism group on H^{p\,q}(X)\, and thus on H^n(X\,C)\, a lthough not on H^n(X\,Z).  (It also gives information about the variation of Hodge structure as X deforms\, but there may not be time for this.)\n\n  \n\nTitle: Integral cohomology of some hypersurfaces\, and applications\n \nAbstract: Abstractly we know all about the integral cohomology of a smoo th hypersurface in complex projective space\, but if we really want to com pute in examples\, it is surprisingly hard to get our hands on\, especiall y the 'transcendental part' not generated by Poincaré duals of subvarietie s. I'll explain that for some hypersurfaces with big automorphism groups\, the middle cohomology is generated by the Aut(X)-orbit of the Poincaré du al of the set of real points.  Then I'll give three applications: one to t he Torelli problem for Calabi-Yau threefolds\, answering a question of Asp inwall\, Morrison\, and Szendrői\, joint with Ben Tighe\; one to intermedi ate Jacobians of cubic threefolds\, in progress with Benson Farb\; and one to a question that Max Lieblich asked me a few years ago\, on surfaces of maximal Picard number.\n\n \n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241119T133000 DTEND;TZID=America/Los_Angeles:20241119T153000 LAST-MODIFIED:20241108T214446Z LOCATION:PDL C-38 SUMMARY:: nbsp Integral cohomology of some hypersurfaces and applications TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-19/nbsp-integral-cohomology- some-hypersurfaces-and-applications END:VEVENT BEGIN:VEVENT UID:83430064-c911-4649-9f9a-f2f3f35e7519 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241003T201851Z DESCRIPTION:Speaker: Spencer Daugherty\, University of Colorado Boulder\n\n Abstract:\n\nThe \$q\,t\$-Catalan numbers can be described elegantly in te rms of pairs of statistics on Dyck paths: area and bounce\, or area and di nv. Using bijective and recursive methods\, we prove new expressions of th e \$q\,t\$-Catalan numbers in terms of pairs of statistics on other Catala n objects such as subsets of permutations\, noncrossing partitions\, unit interval orders\, and certain Young tableaux. Special attention will be gi ven to two different formulations using the disorder statistic on permutat ions. We also study the relationship of our statistics with the zeta map o n Dyck paths and discuss implications for the \$q\,t\$-Catalan symmetry pr oblem.\n\nNote: This talk begins with a pre-seminar (aimed at graduate stu dents) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: h ttps://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20241120T153000 DTEND;TZID=America/Los_Angeles:20241120T170000 LAST-MODIFIED:20241113T200634Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Combinatorial statistics and the q t Catalan numbers TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-20/combinatorial-statistics- and-q-t-catalan-numbers END:VEVENT BEGIN:VEVENT UID:5a8e0ee5-4c2d-46ce-8b49-f26caa556e7a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241116T125311Z DESCRIPTION:Speaker: Brian Nugent\, University of Washington\n\nIn this tal k we will show how to use the derived category to obtain the Hodge decompo sition with minimal analytic input. As an application\, we will prove the Kodaira vanishing theorem. DTSTART;TZID=America/Los_Angeles:20241120T161500 DTEND;TZID=America/Los_Angeles:20241120T171500 LAST-MODIFIED:20241116T125327Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp nbsp Hodge Theory from a n Algebraic Perspective TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-20/students-algebraic-geomet ry-seminar-nbsp-nbsp-hodge-theory-algebraic-perspective END:VEVENT BEGIN:VEVENT UID:7476cc84-7926-43ab-9581-7a8253129276 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20241118T214921Z DESCRIPTION:Speaker: Sean Richardson\, University of Washington\n\nGiven an unknown function on a closed manifold of negative curvature\, it's x-ray transform is the data given by the integrals of this function over all clo sed geodesics. In this talk we explore a natural question: can we reconstr uct the function from this data? DTSTART;TZID=America/Los_Angeles:20241121T123000 DTEND;TZID=America/Los_Angeles:20241121T133000 LAST-MODIFIED:20241118T214921Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp X ray transform on closed manifolds of negative curvatu re TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-21/gsas-nbsp-x-ray-transform -closed-manifolds-negative-curvature END:VEVENT BEGIN:VEVENT UID:4f8bb0b7-f6fd-4c89-b9d9-69b37c4d2a5e DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20241112T194355Z DESCRIPTION:Speaker: Alex Galarraga\n\nAdvisor: Bianca Viray DTSTART;TZID=America/Los_Angeles:20241121T130000 DTEND;TZID=America/Los_Angeles:20241121T140000 LAST-MODIFIED:20241112T194446Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-21/general-exam END:VEVENT BEGIN:VEVENT UID:f6921003-b2a7-42b2-b7c6-3e362cb85510 DTSTAMP:20260617T145208Z CATEGORIES:Lectures CLASS:PUBLIC CREATED:20241115T233738Z DESCRIPTION:Speaker: Silvia Ghinassi\, Shoreline Community College\n\nJoin us for the Autumn 2024 installment of the AWM Speaker Series! Silvia Ghina ssi (Shoreline Community College) will be our speaker and details of her t alk can be found below. The talk will be split into two parts with a 10 mi nute coffee break in between. Please feel free to come for one or both par ts. Hope to see you there!\n\nPart I (2-2:50pm): Title and abstract coming soon\nCOFFEE BREAK (10 minutes)\nPart II (3-3:20pm): Advice for early car eer mathematicians DTSTART;TZID=America/Los_Angeles:20241121T140000 DTEND;TZID=America/Los_Angeles:20241121T153000 LAST-MODIFIED:20241115T234243Z LOCATION:PAA A118 SUMMARY:: AWM Speaker Series TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-21/awm-speaker-series END:VEVENT BEGIN:VEVENT UID:57110da1-0def-458b-9832-7d327923502d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241112T162039Z DESCRIPTION:Speaker: Stefan Steinerberger\n\nWe will discuss some recent re sults and open problems at the interface of combinatorics\, probability\, and analysis.  One such question concerns the existence of Hadamard matric es\, a very difficult problem.  The problem should become much easier if w e relax the condition a little bit\, an idea recently proposed by Dong and Rudelson. Solutions to the 'approximate Hadamard matrix' problem exist bu t they are far from simple. Nice\, simple and explicit solutions should ex ist!   All of this is also connected to so-called vector-balancing problem s and the Komlos conjecture. Finally\, we'll discuss the problem of a (mor ally) bad scientist trying to design a battery of (individually fair) stat istical tests such that a fair unbiased coin is typically identified as bi ased by at least one test. Geometrically\, this corresponds to finding n x n square matrices that send the 2^n vertices of the {-1\,1}^n cube to poi nts with at least one large coordinate on average. We discuss an asymptoti c solution of the problem and the curious structure of low-dimensional ext remal examples when n=2\,3\,4\,... DTSTART;TZID=America/Los_Angeles:20241121T163000 DTEND;TZID=America/Los_Angeles:20241121T180000 LAST-MODIFIED:20241112T162039Z LOCATION:PDL C-038 SUMMARY:: Some combinatorial analytic problems involving matrices TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-21/some-combinatorial-analyt ic-problems-involving-matrices END:VEVENT BEGIN:VEVENT UID:bbe8142b-c54b-46c7-bcac-237475abd66b DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20241119T210730Z DESCRIPTION:Speaker: Charlie Magland\n\nWhat is an affine group scheme? An example heavy introduction to the topic from someone who is afraid of the word scheme. In particular we will learn about affine group schemes of mul tiplicative type\, the first half of the decomposition classification of a belian affine group schemes. DTSTART;TZID=America/Los_Angeles:20241122T143000 DTEND;TZID=America/Los_Angeles:20241122T153000 LAST-MODIFIED:20250312T163053Z LOCATION:PDL C-401 SUMMARY:: Back to School seminar Affine Group Schemes of Multiplicative Typ e TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-22/back-school-seminar-affin e-group-schemes-multiplicative-type END:VEVENT BEGIN:VEVENT UID:742fa3a8-ab45-4af0-b67f-cf452fc7519f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241112T172330Z DESCRIPTION:Speaker: Dan Mikulincer\, University of Washington\n\n Given a large graph\, one is often interested in efficiently estimating various lo cal statistics. In this talk\, we'll discuss the distribution of one possi ble estimator arising from counting monochromatic subgraphs in random vert ex colorings. We focus on the asymptotic normality of these counts\, parti cularly for monochromatic triangles\, and provide new\, local influence-ba sed necessary and sufficient conditions.  The conditions we obtain combine ideas from Boolean analysis as well as classical fourth-moment theorems o riginating from normal approximation results in the Wiener space.\n\n  DTSTART;TZID=America/Los_Angeles:20241125T143000 DTEND;TZID=America/Los_Angeles:20241125T153000 LAST-MODIFIED:20241112T172330Z LOCATION:SMI 405 SUMMARY:: A fourth moment theorem for estimating subgraph counts TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-25/fourth-moment-theorem-est imating-subgraph-counts END:VEVENT BEGIN:VEVENT UID:9251b88e-e393-4462-8c3d-25be52f63463 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240925T211212Z DESCRIPTION:Speaker: Andrea Bertozzi\, UCLA\n\nWe consider the secondary st ructures for aptamers\, single stranded DNA sequences that often fold on t hemselves and can be designed to bind to small molecules. Given a specific aptamer sequence\, there are well-established computational tools to iden tify the lowest energy secondary structure. However there is need for a hi gh-throughput process whereby thousands of DNA structures can be calculate d in real time for use in an interactive setting\, in particular when comb ined with aptamer selection processes in which thousands of candidate mole cules are screened in the lab. We present a new method called GMfold\, whi ch algorithmically uses subgraph matching ideas\, in which the DNA chain i s a graph with nucleotides as graph nodes and adjacency along the chain to define edges in the primary DNA structure. This allow us to cluster thous ands of DNA strands using modern machine learning algorithms. We present e xamples using data from in vitro systematic evolution of ligands by expone ntial enrichment (SELEX). This work is intended to serve as a buiding bloc k for future machine-learning informed DNA-aptamer selection processes for target binding and medical therapeutics. DTSTART;TZID=America/Los_Angeles:20241125T153000 DTEND;TZID=America/Los_Angeles:20241125T163000 LAST-MODIFIED:20241119T190736Z LOCATION:CSE1 691 SUMMARY:: High throughput optimization of DNA aptamer secondary structure f or classification and machine learn TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-25/high-throughput-optimizat ion-dna-aptamer-secondary-structure-classification-and END:VEVENT BEGIN:VEVENT UID:18e9f1f5-0e0f-47a1-a2ef-06aea7c7aeaa DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20241112T194239Z DESCRIPTION:Speaker: Soham Ghosh\n\nAdvisor: Max Lieblich DTSTART;TZID=America/Los_Angeles:20241126T140000 DTEND;TZID=America/Los_Angeles:20241126T150000 LAST-MODIFIED:20241112T194348Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-11-26/general-exam END:VEVENT BEGIN:VEVENT UID:d56a824d-34f9-4695-b9a8-736d6c87bd30 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20241127T161852Z DESCRIPTION:Speaker: Xiangqian Meng\n\nAdvisor: Zhen-Qing Chen\n\nHarnack i nequalities for a class of nonlocal operators DTSTART;TZID=America/Los_Angeles:20241202T110000 DTEND;TZID=America/Los_Angeles:20241202T120000 LAST-MODIFIED:20241127T162054Z LOCATION:SMI 307 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-02/final-exam END:VEVENT BEGIN:VEVENT UID:9c70dbde-15bc-478f-a995-51b574878a22 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241108T230200Z DESCRIPTION:Speaker: Jacob Richey\, Alfréd Rényi Institute of Mathematics\n \nConsider all words over a finite alphabet that avoid a set of forbidden patterns\, e.g. binary sequences with no two adjacent 1s. This can be view ed through the lens of ergodic theory\, as a dynamical system (a 'shift sp ace')\; or combinatorial probability\, as a Markov chain conditioned to av oid the forbidden set\; or statistical physics\, as the thermodynamic limi t of a natural Gibbs measure. I will discuss connections between ideas fro m these worlds in the case where the forbidden set is of size one or two\, including new results related to conjugacy of the underlying shifts\, the ir entropies\, and the asymptotic density of 1s.\n\n  DTSTART;TZID=America/Los_Angeles:20241202T143000 DTEND;TZID=America/Los_Angeles:20241202T153000 LAST-MODIFIED:20241108T230200Z LOCATION:SMI 405 SUMMARY:: Combinatorics and statistics for shifts of finite type TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-02/combinatorics-and-statist ics-shifts-finite-type END:VEVENT BEGIN:VEVENT UID:5889d442-a0d7-47a0-80e3-e32b771df25b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241112T204929Z DESCRIPTION:Speaker: Ziyang Gao\, UCLA\n\nGiven an algebraic curve defined over a number field\, one can define the Néron-Tate height on the Jacobian and prove its positivity. This height pairing and its positivity play imp ortant roles in the proof of the Mordell-Weil theorem\, in Vojta's proof o f the Mordell conjecture\, and in the formulation of the BSD conjecture. T he Jacobian can be seen\, via the Abel-Jacobi map\, as the moduli space of 0-cycles of degree 0 on the algebraic curve.\n\nThe analogue for higher c ycles was studied by Weil\, Griffiths\, Beilinson\, and Bloch. In particul ar in the 1980s\, Beilinson and Bloch independently proposed a conditional definition of heights for arbitrary homologically trivial cycle. The posi tivity of their heights\, as conjectured by Beilinson and Bloch\, is widel y open.\n\nIn this talk\, I will report a recent joint work with Shouwu Zh ang about a generic positivity for the Gross-Schoen and Ceresa cycles of c urves of genus at least 3. These are the simplest situation where the Beil inson-Bloch heights are unconditionally defined. DTSTART;TZID=America/Los_Angeles:20241203T110000 DTEND;TZID=America/Los_Angeles:20241203T115000 LAST-MODIFIED:20241112T204929Z LOCATION:PDL C-401 SUMMARY:: Generic positivity of the Beilinson Bloch height of Gross Schoen and nbsp Ceresa cycles TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-03/generic-positivity-beilin son-bloch-height-gross-schoen-and-nbsp-ceresa-cycles END:VEVENT BEGIN:VEVENT UID:7a9224c4-01fc-40e2-a0c6-f5416be43d81 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241202T195038Z DESCRIPTION:Speaker: Mathias Sonnleitner (University of Alberta)\n\nWith gr owing dimension\, a typical random projection of the\n$\ell_p^n$-ball onto a subspace of fixed dimension tends to a Euclidean\nball of some fixed ra dius. This is related to the strong law of large\nnumbers of the $p^*$-sum of independent and identically distributed line\nsegments\, where $p^*$ i s the conjugate index. It is thus not surprising\nthat  $L_{p^*}$-zonoids appear as shadows and the typical shadow of the\n$\ell_p^n$-ball is close to the above Euclidean ball. We are interested\nin shadows which are stran ge\, meaning that they occur with probability\nexponentially decaying with some rate. This is formalized by a large\ndeviations principle in the spa ce of convex bodies equipped with\nHausdorff distance in the case of $p>2$ . Building on work of Kim and\nRamanan\, we identify the rate of decay via the entropy of representing\nmeasures of the corresponding $L_{p^*}$-zono id. Via duality we obtain a\nresult for random sections. Based on joint wo rk with Zakhar Kabluchko.\n\n  DTSTART;TZID=America/Los_Angeles:20241203T133000 DTEND;TZID=America/Los_Angeles:20241203T153000 LAST-MODIFIED:20241202T195038Z LOCATION:PDL C-401 SUMMARY:: Strange shadows of ell p balls TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-03/strange-shadows-ell-p-bal ls END:VEVENT BEGIN:VEVENT UID:598b64f2-1cf7-4802-8b7c-97ab97765439 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20240610T223535Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n \n AAP hiring - Zhang\n Accessible Course Materials and Canvas - Taggart \n \n \n Committee Reports\n \n Graduate Program - Lieblich & Pevtsova\n \n \n New Business\n Executive Session\n Adjournment\n\n\n\n\nMINUTES\n\nThe regular meeting of the faculty of the Department of Mathematics was held virtually via Zoom at 3:30pm PST\, December 3\, 2024. Max Lieblich\, Chair\, presid ed over the meeting. Rose Choi was the recording secretary.\n\nChair's Rem arks\n\nPlease remember to submit your receipts for reimbursement within 9 0 days of purchase.\n\nThe business@math email should be reserved strictly for departmental business only. Please post all other messages to bboard@ math. \n\nThe scheduling form for courses has been modified to better addr ess scheduling needs.\n\nThe previous meeting’s minutes were approved and all future minutes will be approved via consent agenda.\n\nThe department will need to make some budgetary cuts for this year to make up for the los ses accrued over the summer and the recent hires. \n\nThe Structure Commit tee has been working on how to distribute the undergraduate teaching effor t among the tenure-track faculty. Awards\, recognitions\, etc are also in the works.\n\nThe College will increase the temporary instructional fundin g by 3% over the next 3 years. \n\nAnnouncements\n\nThe deadline for appli cations to the Acting Assistant Professorship search is next week. Faculty can review the materials on Interfolio over the winter break with a meeti ng to discuss the candidates in late January. If you would like to send re commendations to the search committee\, you can do so by email James Zhang . We hope to hire 2-3 AAPs.\n\nJenni Taggart and UW-IT have created a UW M ath group on Canvas Commons to streamline the effort of finding and connec ting with other departmental members who wish to access and share their ol d courses with each other. Detailed instructions on how to join and naviga te the program will be sent via email.\n\nIn preparation for the new digit al accessibility rule under Title II of the  Americans with Disabilities A ct (ADA)\, please familiarize yourself with the guidelines and techniques for creating accessible course content. The University has a guide at www. washington.edu/accesstech/get-started/.\n\nCommittee Reports\n\nSummer tea ching applications will go out this Friday. There will likely be far more students interested than there are available positions.\n\nAs grad student salaries are slated to increase by 30% over the next 3 years with the rec ently negotiated Union contract\, and with no additional funds coming from the College\, the department needs to shrink their program size and rethi nk its values and direction. There will be a survey sent out with group di scussions to take place in January and February. The Graduate Program Comm ittee hopes to present a plan in April or May with implementation in May. \n\nNew Business\n\nSara Billey is working on an alumni event during the J MM in January. Details will go out shortly.\n\nPlease send Farbod Shokrieh feedback by Thursday on the Faculty Senate item re: Updating Faculty Code language on effective teaching.\n\nADJOURNMENT\n\nThe meeting passed into executive session at 4:32pm. DTSTART;TZID=America/Los_Angeles:20241203T153000 DTEND;TZID=America/Los_Angeles:20241203T163000 LAST-MODIFIED:20250204T223800Z LOCATION:via Zoom SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-03/faculty-meeting END:VEVENT BEGIN:VEVENT UID:e3f57e78-9597-4294-be04-9fac07ee14fd DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions\, Student Activities CLASS:PUBLIC CREATED:20241124T073155Z DESCRIPTION:Speaker: Experimental Lean Lab\n\nThe eXperimental Lean Lab wil l showcase using Lean to formalize real mathematics. We have five groups f ormalizing 1) generating functions\, 2) central limit theorem\, 3) topolog y for algebraic geometry\, 4) examples in commutative algebra\, and 5) met aprogramming in Lean.If you have been curious about using computers for pr oof assistance and verification\, this talk is for you! DTSTART;TZID=America/Los_Angeles:20241203T163000 DTEND;TZID=America/Los_Angeles:20241203T173000 LAST-MODIFIED:20260121T213811Z LOCATION:CMU B-006 SUMMARY:: Formalizing mathematics in the eXperimental Lean Lab TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-03/formalizing-mathematics-e xperimental-lean-lab END:VEVENT BEGIN:VEVENT UID:f50981ae-e1fd-4dfb-b2bf-ecb84b898906 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240924T204235Z DESCRIPTION:Speaker: Changxin Ding\, Georgia Institute of Technology\n\nAbs tract:\n\nTo a finite connected graph G\, we may associate two Lawrence po lytopes. The maximal simplices in any dissection of the Lawrence polytope are in bijection with the spanning trees of G. We may use them to define b ijections between the spanning trees of G and the cycle-cocycle reversal c lasses of orientations of G\, which generalizes the work of Bernardi and t he work of Backman\, Baker\, and Yuen. We may also use them to study activ ities of G and\, more specifically\, reduced divisors of G\, which general izes the work of Cori and Le Borgne. Based on my work arXiv:2306.07376 and another ongoing work.\n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMeeting ID: 915 4 733 5974 DTSTART;TZID=America/Los_Angeles:20241204T153000 DTEND;TZID=America/Los_Angeles:20241204T170000 LAST-MODIFIED:20241202T220940Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Lawrence polytopes of a graph TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-04/lawrence-polytopes-graph END:VEVENT BEGIN:VEVENT UID:a17a8b2c-942e-4688-9f34-ae9bc9ed7ff5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241202T022003Z DESCRIPTION:Speaker: Daniel Rostamloo\, University of Washington\n\nThe phr ase 'Torelli theorem' roughly refers to results demonstrating that cohomol ogical invariants determine the objects in the underlying geometric catego ry. In this talk\, we will give an overview of one such theorem in the der ived setting for K3 surfaces in characteristic 0 developed primarily by th e work of Mukai and Orlov. Time permitting\, we will also discuss recent g eneralizations of these results to positive characteristic by Lieblich and Olsson. DTSTART;TZID=America/Los_Angeles:20241204T161500 DTEND;TZID=America/Los_Angeles:20241204T171500 LAST-MODIFIED:20241202T022015Z LOCATION:CMU 230 SUMMARY:: Students Algebraic Geometry Seminar nbsp Fourier Mukai Partners o f K3 Surfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-04/students-algebraic-geomet ry-seminar-nbsp-fourier-mukai-partners-k3-surfaces END:VEVENT BEGIN:VEVENT UID:07431b06-afd4-417a-907d-14b6fdb86b99 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20241129T221555Z DESCRIPTION:Speaker: Hyojeong Son\n\nSelf-organized criticality (SOC)\, int roduced by Bak\, Tang\, and Wiesenfeld in 1987\, describes how complex sys tems naturally evolve to a critical state without the need for fine-tuned parameters. SOC is observed in diverse phenomena\, including financial mar ket fluctuations and forest fires\, which exhibit power-law distributions. While traditional models like sandpiles have been instrumental in studyin g SOC\, the Activated Random Walk (ARW) model stands out as a promising ca ndidate due to its universal characteristics. In this talk\, we review exi sting SOC models and present evidence supporting the ARW model’s robustnes s and versatility in capturing self-organized criticality. \n\n  DTSTART;TZID=America/Los_Angeles:20241205T123000 DTEND;TZID=America/Los_Angeles:20241205T133000 LAST-MODIFIED:20241129T221614Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Universality for Self organized Criticality TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-05/gsas-nbsp-universality-se lf-organized-criticality END:VEVENT BEGIN:VEVENT UID:bc2d3ee7-6a74-4e27-bd94-2523c9176759 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20241127T180549Z DESCRIPTION:Speaker: Lorenzo Bottiglione\n\n \n\nAdvisor: Farbod Shokrieh DTSTART;TZID=America/Los_Angeles:20241205T130000 DTEND;TZID=America/Los_Angeles:20241205T140000 LAST-MODIFIED:20241127T180654Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-05/general-exam END:VEVENT BEGIN:VEVENT UID:4c2fb27d-6c44-4d0e-b857-4c0ef434e7f1 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20241202T174506Z DTSTART;TZID=America/Los_Angeles:20241205T173000 DTEND;TZID=America/Los_Angeles:20241205T190000 LAST-MODIFIED:20260121T215259Z LOCATION:Denny 303 SUMMARY:: WXML Open House TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-05/wxml-open-house END:VEVENT BEGIN:VEVENT UID:46c36701-0a1f-416d-a8cb-78623872d1ec DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241015T173720Z DESCRIPTION:Speaker: Keaton Naff (Lehigh)\n\nIn this talk\, we will discuss the mean curvature flow of $n$-dimensional submanifolds in $\mathbb{R}^N$ satisfying a pinching condition $|A|^2 < c |H|^2$ introduced by Andrews a nd Baker ('10). We will introduce a planarity estimate that shows singular ities of these flows must become codimension one then survey more recent r esults and remaining open problems in this area. DTSTART;TZID=America/Los_Angeles:20241211T160000 DTEND;TZID=America/Los_Angeles:20241211T170000 LAST-MODIFIED:20241209T161107Z LOCATION:PDL C-038 SUMMARY:: The nbsp planarity nbsp estimate nbsp in higher codimension mean curvature nbsp flow TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-11/nbsp-planarity-nbsp-estim ate-nbsp-higher-codimension-mean-curvature-nbsp-flow END:VEVENT BEGIN:VEVENT UID:80856b6d-8d91-453b-b7fc-ba52e9ee9b06 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241202T074840Z DESCRIPTION:Speaker: Min CHEN\, U. of Oregon\n\nThe geometric flow of hyper surfaces is an interesting and active area. Its importance lies in the app lications in geometry and topology. For example\, Huisken and Ilmanen in 2 001 applied the inverse mean curvature flow to prove the famous Penrose co njecture\; applying the inverse curvature flow\, Guan and Li in 2009 prove d the Alexandrov-Fenchel inequalities for star-shaped and $k$-convex domai ns in Euclidean space. Brendle-Guan-Li proposed a conjecture on the Alexan drov-Fenchel inequalities for hypersurface in the sphere and introduced a locally constrained fully nonlinear curvature flow to study this conjectur e.  In this talk\, we will discuss using a new flow type to study this que stion and some new progress in this conjecture.\n\n \n\n\n\n \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20241212T153000 DTEND;TZID=America/Los_Angeles:20241212T163000 LAST-MODIFIED:20241207T070508Z LOCATION:PDL C-401 SUMMARY:: Alexandrov Fenchel type inequalities for hypersurfaces in the sph ere TRANSP:OPAQUE URL:https://math.washington.edu/events/2024-12-12/alexandrov-fenchel-type-i nequalities-hypersurfaces-sphere END:VEVENT BEGIN:VEVENT UID:4577de82-7837-48fa-a589-495e90ee7bc1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250103T185508Z DESCRIPTION:Speaker: Sam Miller (UCSC)\n\n\n\n\n\n\nTitle pre-seminar: Tens or-triangular geometry in modular representation theory\nAbstract pre-semi nar: To quote Everett C. Dade\, 'There are just too many modules over $p$- groups!' Indeed\, the question of classifying indecomposable modular repre sentations of finite groups is a seemingly impossible task. This suggests that instead\, we should attempt to classify modules up to some notion of equivalence. Tensor-triangular geometry provides a framework to do this\, by instead proposing that we classify all the thick tensor ideals of the s table module category stmod(kG). In this talk\, I will give an overview of these topics\, introducing tensor-triangular geometry with a focus on its application to modular representation theory. \n\n \n\nTitle seminar:Perm utation modules and endotrivial complexes\nAbstract seminar: Let $G$ be a finite group and $k$ a field of characteristic $p > 0$. The recent work of Balmer and Gallauer has illuminated much about the bounded homotopy categ ory of $p$-permutation modules\, $K^b(p\operatorname{-perm}(kG))$\, a tens or-triangulated category that is fundamentally linked with Broue's abelian defect group conjecture\, in addition to structures in algebraic geometry and algebraic topology. The spectrum of this category is controlled by th e Balmer spectrum of derived module categories of '$p$-local subgroups' vi a modular fixed-points functors - an example of 'local-to-global' behavior in modular representation theory. In this talk\, I will motivate this cat egory\, discuss its geometry\, and describe the classification of invertib le objects\, which I call endotrivial complexes. If time permits\, I will discuss ongoing work joint with Balmer and Gallauer which seeks to give a geometric description of the Picard group.\n\n \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250107T133000 DTEND;TZID=America/Los_Angeles:20250107T153000 LAST-MODIFIED:20250103T185508Z LOCATION:PDL C-38 SUMMARY:: Permutation modules and endotrivial complexes TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-07/permutation-modules-and-e ndotrivial-complexes END:VEVENT BEGIN:VEVENT UID:b014f369-5961-45cc-b390-b8601da294de DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250106T044943Z DESCRIPTION:Speaker: Katya Krupchyk\, UC Irvine\n\nIn this talk\, we will d iscuss an analog of the anisotropic\nCalderon problem for fractional Schro dinger operators on closed\nRiemannian manifolds of dimension two and high er. We will demonstrate\nthat the knowledge of a Cauchy data set of soluti ons to the fractional\nSchrodinger equation\, given on an open nonempty su bset of the\nmanifold\, determines both the Riemannian manifold up to an i sometry\nand the potential up to the corresponding gauge transformation\, under\ncertain geometric assumptions on the manifold as well as the\nobser vation set. This is joint work with Ali Feizmohammadi and Gunther\nUhlmann .\n\n \n\n\n\n \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250107T143000 DTEND;TZID=America/Los_Angeles:20250107T153000 LAST-MODIFIED:20250114T220222Z LOCATION:PDL C-401 SUMMARY:: The anisotropic Calderon problem for fractional Schrodinger opera tors on closed Riemannian manifolds Joint w IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-07/anisotropic-calderon-prob lem-fractional-schrodinger-operators-closed-riemannian END:VEVENT BEGIN:VEVENT UID:1ebc2fbb-6232-40b8-9998-e2118c55785f DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210312Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n \n Colloquium - Rohde\n \n \n Committee Reports\n New Business\n Executive Se ssion\n Adjournment\n\n\nMINUTES\n\nThe regular meeting of the faculty of t he Department of Mathematics was held virtually via Zoom at 3:30pm PST\, J anuary 7\, 2025. Max Lieblich\, Chair\, presided over the meeting. Rose Ch oi was the recording secretary.\n\nChair's Remarks\n\nMuch thanks to Rekha Thomas and her committee for setting up the new math Instagram account @u ofwa.math.\n\nThere’s a new alumni board spearheaded by Sara Billey who ha s also put together an alumni gathering at the JMM.\n\nThe faculty shared their memories of Ed Curtis and David Ragozin.\n\nAnnouncements\n\nThere a re three colloquia this quarter starting off with Bryna Kra from Northwest ern University on February 14. Please aim to come to these talks\, as well as the pre-colloquium tea. The full schedule of the talks can be found at https://math.washington.edu/events/series/uw-pims-colloquium.\n\nAll facu lty should have received a survey from the Graduate Committee gauging thei r thoughts on the future of the graduate program. Please fill this out as feedback is vital to how the program is shaped.\n\nNew Business\n\nThe alu mni gathering is at 7pm at the Sheraton during the JMM. Many alumni have c onfirmed so please be sure to attend. There is also a new LinkedIn page fo r the department that will be regularly maintained along with the new Inst agram.\n\nThere will be a grad student award ceremony at the end of the mo nth.\n\nThe previous meeting’s minutes will be voted on by consent agenda at the next month’s meeting.\n\nADJOURNMENT\n\nThe meeting passed into exe cutive session at 3:57pm. DTSTART;TZID=America/Los_Angeles:20250107T153000 DTEND;TZID=America/Los_Angeles:20250107T163000 LAST-MODIFIED:20250115T223310Z LOCATION:via Zoom SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-07/faculty-meeting END:VEVENT BEGIN:VEVENT UID:317ebea5-dcec-4e6c-b2cc-0b20fecaee31 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20240909T230021Z DESCRIPTION:Speaker: All current and former members of the department are i nvited.\n\nThe Joint Math Meeting of the AMS and MAA will be held in Seatt le\, January 8-11\, 2025.   There will be many alumni of the UW Math Depar tment at the meeting.   Plus\, there are many alums and current members of the department in Seattle.  So\, let's celebrate the moment at a gatherin g at the Sheraton Hotel (Juniper Room) near the Convention Center at 7:00- 8:30pm on Thursday January 9\, 2025.   Please RSVP using this link:https:/ /forms.gle/FNLV6xu4u7odhpZz8 DTSTART;TZID=America/Los_Angeles:20250109T190000 DTEND;TZID=America/Los_Angeles:20250109T203000 LAST-MODIFIED:20260121T222530Z LOCATION:Sheraton Grand Seattle SUMMARY:: UW Math Alumni Gathering TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-09/uw-math-alumni-gathering END:VEVENT BEGIN:VEVENT UID:d3ca5368-2523-4e56-986d-de4d0154351f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241224T232444Z DESCRIPTION:Speaker: Tang-Kai Lee (MIT)\n\nThe smooth mean curvature flow o ften develops singularities\, making weak solutions essential for extendin g the flow beyond singular times\, as well as having applications for geom etry and topology. Among various weak formulations\, the level set flow me thod is notable for ensuring long-time existence and uniqueness. However\, this comes at the cost of potential fattening\, which reflects genuine no n-uniqueness of the flow after singular times. With Xinrui Zhao\, we show that even for flows starting from smooth\, embedded\, closed initial data\ , such non-uniqueness can occur. Our examples extend to higher dimensions\ , complementing the surface examples obtained by Ilmanen and White. Thus\, we can't expect genuine uniqueness in general. Addressing this non-unique ness issue is a difficult problem. With Alec Payne\, we establish a genera lized avoidance principle. We prove that level set flows satisfy this prin ciple in the absence of non-uniqueness. DTSTART;TZID=America/Los_Angeles:20250110T153000 DTEND;TZID=America/Los_Angeles:20250110T163000 LAST-MODIFIED:20241231T045337Z LOCATION:PDL C-401 SUMMARY:: Non uniqueness of mean curvature flow TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-10/non-uniqueness-mean-curva ture-flow END:VEVENT BEGIN:VEVENT UID:92a959fe-78b6-4eae-a136-429676093a1d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250108T234240Z DESCRIPTION:Speaker: Zhengxin Zhang\, Cornell University\n\n\n\nAbstract: T he Gromov-Wasserstein (GW) distance\, rooted in optimal transport (OT) the ory\, quantifies dissimilarity between metric measure spaces and provides a natural framework for aligning them. As such\, GW distance enables appli cations including object matching\, single-cell genomics\, and matching la nguage models. While computational aspects of the GW distance have been st udied heuristically\, most of the mathematical theories pertaining to GW d uality\, Brenier maps\, geometry\, etc.\, remained elusive\, despite the r apid progress these aspects have seen under the classical OT paradigm in r ecent decades. This talk will cover recent progress on closing these gaps for the GW. We present (i) sharp statistical estimation rates through dual ity (ii) a thorough investigation of the Jordan-Kinderlehrer-Otto (JKO) sc heme for the gradient flow of inner product GW (IGW) distance\, and (iii) a dynamical formulation of IGW\, which generalizes the Benamou-Brenier for mula for the Wasserstein distance. Central to (ii)\, (iii) is a Riemannian structure on the space of probability distributions\, based on which we a lso propose novel numerical schemes for measure evolution and deformation. \n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250113T143000 DTEND;TZID=America/Los_Angeles:20250113T152000 LAST-MODIFIED:20250108T234240Z LOCATION:CLK 219 SUMMARY:: New Paradigm in Optimal Transport Statistics and Riemannian Struc ture of Gromov Wasserstein Distance TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-13/new-paradigm-optimal-tran sport-statistics-and-riemannian-structure-gromov END:VEVENT BEGIN:VEVENT UID:51c37f09-5e5f-4aab-b727-493d73367ed1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250114T061023Z DESCRIPTION:Speaker: Edna Jones\, Tulane University\n\nWe will discuss the local-global conjecture for certain integral Kleinian sphere packings\, su ch as Soddy sphere packings and orthoplicial Apollonian sphere packings. ( These sphere packings are 3-dimensional analogues of Apollonian circle pac kings.) Sometimes each sphere in a Kleinian sphere packing has a bend (1/r adius) that is an integer. When all the bends are integral\, which integer s appear as bends? In 2019\, Kontorovich proved the local-global conjectur e for Soddy sphere packings. Work towards proving a local-global conjectur e for orthoplicial Apollonian sphere packings has been done by Dias and Na kamura. We will discuss work concerning local-global conjectures for Klein ian sphere packings. DTSTART;TZID=America/Los_Angeles:20250114T110000 DTEND;TZID=America/Los_Angeles:20250114T115000 LAST-MODIFIED:20250114T061023Z LOCATION:PDL C-401 SUMMARY:: On the local global conjecture for higher dimensional Kleinian sp here packing TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-14/local-global-conjecture-h igher-dimensional-kleinian-sphere-packing END:VEVENT BEGIN:VEVENT UID:ce3fc97d-68ac-4add-8508-9925deb83a75 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241202T195358Z DESCRIPTION:Speaker: Charles Fougeron (Université Sorbonne Paris Nord)\n\nM otivated by the richness of the Gauss algorithm\, which allows for the eff icient calculation of the best approximations of a real number by rational s\, many mathematicians have proposed generalizations of these algorithms to approximate vectors of dimension greater than one. Examples include the algorithm\nintroduced by Poincaré at the end of the 19th century and thos e by Brun and Selmer in the mid-20th century.\n\nFrom the early 1990s to t he present\, there has been significant research studying the convergence of these algorithms. Notably\, Schweiger and Broise have demonstrated that the Selmer and Brun algorithms are convergent and ergodic. Perhaps more s urprisingly\, Nogueira has shown that the algorithm proposed by\nPoincaré almost never converges. More recently these renormalisations process have been used to study families of fractals sets appearing in number theory or the so called Rauzy gasket.\n\nStarting from the classic case of the Fare y algorithm\, which is an 'additive' version of the Gauss algorithm\, I wi ll present a combinatorial perspective on these algorithms that allows for a transition from a deterministic view to a probabilistic approach. In th is model\, selecting a random vector according to the Lebesgue measure cor responds to following a random walk with memory on a labeled graph called a simplicial system. The laws governing this random walk are elementary\, and we can develop probabilistic techniques to study their generic dynamic behavior. This will lead us to describe a purely graph-theoretic criterio n to demonstrate whether a continued fraction algorithm converges or not. DTSTART;TZID=America/Los_Angeles:20250114T133000 DTEND;TZID=America/Los_Angeles:20250114T153000 LAST-MODIFIED:20250107T174220Z LOCATION:PDL C-401 SUMMARY:: Dynamics of Multidimensional Continued Fraction Algorithms as a R andom Walk on Graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-14/dynamics-multidimensional -continued-fraction-algorithms-random-walk-graphs END:VEVENT BEGIN:VEVENT UID:c7ac0eed-68a0-442a-afd5-fdea0d6ddce8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250110T223127Z DESCRIPTION:Speaker: Danny Ofek (UBC)\n\n\n\n\n\n\nPre-seminar title: Intro duction to essential dimension\n\nAbstract: The essential dimension of an algebraic structure is the minimal number of independent parameters needed to define it. It is a natural measure of complexity connected to many pro blems in algebra and geometry.   J. Buhler and Z. Reichstein showed that t he essential dimension of many different types of objects can be studied i n a uniform way using equivariant birational geometry. In this pre-seminar talk\, we will explore this geometric perspective\, focusing on the examp le of étale algebras.\n\n \n\nSeminar title: Lower bounds on the essential dimension of reductive groups\n\nAbstract:  The essential dimension of an algebraic group G is an integer measuring the complexity of G and of its torsors. Often G-torsors classify a class of algebraic objects\, in which case ed(G) is the minimal number of independent parameters needed to defin e a generic object of that type. For example\, ed(PGL_n) is the number of parameters needed to define a generic division algebra of degree n. \n\nWe introduce a new technique for proving lower bounds on the essential dimen sion of split reductive groups. As an application\, we strengthen the best previously known lower bounds for various split simple algebraic groups\, most notably for the exceptional group E8. In the case of the projective linear group PGL_n\, we recover A. Merkurjev’s celebrated lower bound with a simplified proof. Our technique relies on decompositions of loop torsor s over valued fields due to P. Gille and A. Pianzola\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250114T133000 DTEND;TZID=America/Los_Angeles:20250114T153000 LAST-MODIFIED:20250129T131453Z LOCATION:PDL C-38 SUMMARY:: nbsp Lower bounds on the essential dimension of reductive groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-14/nbsp-lower-bounds-essenti al-dimension-reductive-groups END:VEVENT BEGIN:VEVENT UID:7e64c179-1499-442e-9c01-33fc0ad23beb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250105T205201Z DESCRIPTION:Speaker: Hannah Friedman\, University of California Berkeley\n \nAbstract:\n\nThe Grassmannian is studied very differently in pure and ap plied mathematics. From studying these two embeddings of the Grassmannian\ , a new variety called the squared Grassmannian arises naturally as the im age of the Grassmannian in its Plücker embedding under the coordinate-wise squaring map. We summarize what is known so far about the squared Grassma nnian\, e.g.\, dimension\, degree\, etc. The squared Grassmannian also ari ses in statistics as the model for a family of probability distributions c alled projection determinantal point processes. We give an overview of the work that has been done on the likelihood geometry of projection determin antal point processes. Our main result is that the log-likelihood function of this statistical model has \$(n−1)!/2\$ critical points\, all of which are real and positive.\n\nNote: This talk begins with a pre-seminar (aime d at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoi n Zoom Meeting: https://washington.zoom.us/j/91547335974\nMeeting ID: 915  4733 5974 DTSTART;TZID=America/Los_Angeles:20250115T153000 DTEND;TZID=America/Los_Angeles:20250115T170000 LAST-MODIFIED:20250105T205447Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: The Squared Grassmannian TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-15/squared-grassmannian END:VEVENT BEGIN:VEVENT UID:219c827f-4848-4175-8103-13c2edc01062 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241002T010945Z DESCRIPTION:Speaker: Xin Zhou (Cornell)\n\nWe will survey some recent progr ess on the existence of minimal 2-spheres and minimal tori in a Riemannian 3-sphere. DTSTART;TZID=America/Los_Angeles:20250115T160000 DTEND;TZID=America/Los_Angeles:20250115T170000 LAST-MODIFIED:20250109T005712Z LOCATION:PDL C-038 SUMMARY:: Minimal surfaces existence problem in a Riemannian 3 sphere TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-15/minimal-surfaces-existenc e-problem-riemannian-3-sphere END:VEVENT BEGIN:VEVENT UID:dd402f04-2db0-4be1-8e3b-27473b53b9ea DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250106T162241Z DESCRIPTION:Speaker: Sean Richardson\n\nAdvisor: Gabriel Paternain DTSTART;TZID=America/Los_Angeles:20250116T100000 DTEND;TZID=America/Los_Angeles:20250116T110000 LAST-MODIFIED:20250106T162403Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-16/general-exam END:VEVENT BEGIN:VEVENT UID:c7d03211-f3d3-4eda-89eb-86960fbd3805 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250113T155326Z DESCRIPTION:Speaker: Emily Casey\, Linhang Huang\, Garrett Mulcahy\, Sebast ian Munoz-Thon\, Ignacio Tejeda\, Ruirui Wu\, Tony Zeng\n\n5 minute resear ch introductions given by graduate students in analysis. All graduate stud ents (especially first and second years) are welcome!  DTSTART;TZID=America/Los_Angeles:20250116T123000 DTEND;TZID=America/Los_Angeles:20250116T133000 LAST-MODIFIED:20250113T155401Z LOCATION:PDL C-401 SUMMARY:: GSAS Lightning Talks TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-16/gsas-lightning-talks END:VEVENT BEGIN:VEVENT UID:6afeb935-8b6e-42a3-94a5-54995346df43 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250112T114759Z DESCRIPTION:Speaker: Burt Totaro\, UCLA\n\nA natural class of dynamical sys tems is obtained by iterating polynomial maps\, which can be viewed as map s from projective space to itself. One can ask which other projective vari eties admit endomorphisms of degree greater than 1. This seems to be an ex tremely restrictive property\, with all known examples coming from toric v arieties (such as projective space) or abelian varieties. We describe what is known in this direction\, with the new ingredient being the 'Bott vani shing' property. Joint work with Tatsuro Kawakami. DTSTART;TZID=America/Los_Angeles:20250116T150000 DTEND;TZID=America/Los_Angeles:20250116T160000 LAST-MODIFIED:20250124T011546Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Endomorphisms of varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-16/student-ag-seminar-endomo rphisms-varieties END:VEVENT BEGIN:VEVENT UID:03082120-2cde-4e88-8481-97b4759fc0bc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250113T202712Z DESCRIPTION:Speaker: Andrew Aguilar\, University of Washington\n\nMuch of w hat can be said about Lie groups comes from studying their Lie algebras. B ut when does the Lie algebra not give us everything? We will look at the r elationship between affine group schemes and their Lie algebras over a fie ld of positive characteristic and highlight the differences from the chara cteristic 0 case. As motivation\, we will look at examples related to the special linear group and do some concrete computations.\n\nZoom Link: http s://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250117T143000 DTEND;TZID=America/Los_Angeles:20250117T152000 LAST-MODIFIED:20250113T202740Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar When do Lie algebras lie TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-17/1-2-3-seminar-when-do-lie -algebras-lie END:VEVENT BEGIN:VEVENT UID:8793cfc0-1722-4442-a5a9-e6146ce8ad71 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250114T215913Z DESCRIPTION:Speaker: Sebasti\'an Mu\~noz Thon\, Purdue\n\nIn a semi-Rieman nian manifold\, given a point and direction\non the boundary\, we follow t he geodesic flow until we hit another\npoint on the boundary with a certai n direction. This defines a map\ncalled the scattering relation. The scatt ering rigidity problem asks\nto what extent the scattering relation determ ines the metric on the\nmanifold. We will present a result for stationary metrics using the\ntimelike version of this map. The proof relies on a (sy mplectic)\nreduction to the scattering rigidity problem for magnetic-poten tial\nsystems\, that is\, Riemannian manifolds endowed with a closed 2-for m\n(the magnetic part) and a smooth function (the potential).\n\n \n\n\n\n  \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250122T160000 DTEND;TZID=America/Los_Angeles:20250122T170000 LAST-MODIFIED:20250114T215913Z LOCATION:PDL C-038 SUMMARY:: Scattering rigidity for stationary geometries via timelike geodes ics Joint w IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-22/scattering-rigidity-stati onary-geometries-timelike-geodesics-joint-w-ip-seminar END:VEVENT BEGIN:VEVENT UID:0149e6f9-a2d1-4355-adfa-a589eb49f331 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250117T195026Z DESCRIPTION:Speaker: Arkamouli Debnath\, UW\n\n\n\nGeometric Invariant Theo ry (GIT) is the theory of defining quotients in Algebraic Geometry. In his paper https://arxiv.org/abs/1203.0276 (The Derived Category of a GIT quot ient) Halpern-Leistner sets up a way of thinking about the derived categor y of a GIT quotient and in particular gives a semiorthogonal decomposition of the derived category of \$[X/G]\$ where one of the components is the d erived category of \$[X^{ss}/G]\$ where \$G\$ is a reductive group\, \$X\$ is a variety and \$X^{ss}\$ is the GIT semistable locus. In this talk I w ill start with a short introduction to GIT and try to give a roadmap to ho w we get such a semiorthogonal decomposition. It will involve the idea of what are called 'window categories' which are extremely important tools be ing used in this area recently. DTSTART;TZID=America/Los_Angeles:20250123T150000 DTEND;TZID=America/Los_Angeles:20250123T160000 LAST-MODIFIED:20250124T011620Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Derived Category of GIT Quotient TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-23/student-ag-seminar-derive d-category-git-quotient END:VEVENT BEGIN:VEVENT UID:96f2ce9e-3e49-458b-b061-609ffc00f9d2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250122T232320Z DESCRIPTION:Speaker: John Palmieri\n\nStable homotopy theory is a part of a lgebraic topology\, with a strong algebraic flavor. There are deep questio ns and complicated structures\, along with ties to other parts of mathemat ics\, including homological algebra\, algebraic geometry\, number theory\, and representation theory. I will talk about at least some of this\, with a focus on the research here at UW. There will also be special guests! DTSTART;TZID=America/Los_Angeles:20250123T163000 DTEND;TZID=America/Los_Angeles:20250123T180000 LAST-MODIFIED:20250122T232320Z SUMMARY:: Stable homotopy theory at UW TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-23/stable-homotopy-theory-uw END:VEVENT BEGIN:VEVENT UID:b049fd4d-7bd8-409d-934b-1cb05ed07af5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250120T210355Z DESCRIPTION:Speaker: Michael Zeng\, University of Washington\n\n\n\nChow gr oups are algebraists' version of homology. They enable us to talk about ho mologous cycles and intersection of ‘submanifolds’ purely within the confi nes of schemes\, providing generalizations to these notions to varieties o ver more general fields. However\, we often need to consider varieties wit h interesting symmetries\, and this machinery breaks for quotient spaces c oming from those group actions. \n\nIn this talk\, we are going to learn a bout a ‘fix’ to the above problem via equivariant Chow groups. We will com pute concrete examples of chow groups of singular quotients and provide hi nts towards the category of motivic spaces and intersection theory on quot ient stacks.\n\nZoom Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250124T143000 DTEND;TZID=America/Los_Angeles:20250124T152000 LAST-MODIFIED:20250120T210422Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Chow groups quotients and equivariant intersection theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-24/1-2-3-seminar-chow-groups -quotients-and-equivariant-intersection-theory END:VEVENT BEGIN:VEVENT UID:ab539b9a-1315-415c-8e61-a9092b8783eb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250122T220148Z DESCRIPTION:Speaker: Gourab Ray\, Univ of Victoria\n\nI will introduce a mo del of random spanning trees called minimum spanning arborescence\, which is defined as follows. Consider a finite graph\, and assign iid continuous weights to both orientations of every edge. Fix a root vertex and now con sider a directed spanning tree with every edge oriented towards the root. The minimum spanning arborescence is the arborescence with minimum weight.  \n\n \n\nThe undirected version of this model: the minimum spanning tree has been studied extensively by probabilists in the past two decades or so .\n\nTurns out the oriented model has been studied quite a lot by computer scientists in the 70's and have a lot of applications\, but has eluded th e attention of probabilists. One of the reasons\, perhaps\, is that there is no nice algorithm like Kruskal's or Prim's algorithm to study this mode l.\n\n \n\nI will talk about a project which attempts to turn the attentio n of probabilists to this area\, and illustrate that there is another nice algorithm (which we call the CLEB algorithm\, but sometimes called Edmond 's algorithm in computer science literature) which can be used to study  t he probabilistic aspects\, particularly the geometry of minimum spanning a rborescence. I will talk about some preliminary results in this area\, and about some upcoming projects. One interesting aspect we find is that this model in some cases is much closer to the Uniform spanning tree than to t he (unoriented) minimum spanning tree.\n\n \n\nJoint work with Arnab Sen. DTSTART;TZID=America/Los_Angeles:20250127T143000 DTEND;TZID=America/Los_Angeles:20250127T153000 LAST-MODIFIED:20250122T220148Z LOCATION:CLK 219 SUMMARY:: Minimum spanning arborescence nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-27/minimum-spanning-arboresc ence-nbsp END:VEVENT BEGIN:VEVENT UID:d4cba1b5-e712-46b6-bd54-bb5bb64e49e2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250129T052255Z DESCRIPTION:Speaker: Dylon Chow\n\nIn this talk\, I will discuss the Galois cohomology set of a reductive group G and its relation to the algebraic f undamental group of G\, over local and global fields and over some fields of arithmetic type. DTSTART;TZID=America/Los_Angeles:20250128T110000 DTEND;TZID=America/Los_Angeles:20250128T115000 LAST-MODIFIED:20250129T052255Z LOCATION:PDL C-401 SUMMARY:: Galois Cohomology of Algebraic Groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-28/galois-cohomology-algebra ic-groups END:VEVENT BEGIN:VEVENT UID:0dc1af65-ceff-4e09-831f-0ee45e59ad21 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250126T183814Z DESCRIPTION:Speaker: Rekha Thomas\, University of Washington\n\nAbstract:\n \nAn unweighted graph is conformally rigid if allowing nonnegative edge we ights will not increase the second eigenvalue\, or decrease the largest ei genvalue\, of its Laplacian matrix. There are natural motivations for find ing weights on a graph that maximizes/minimizes these eigenvalues. At firs t glance\, conformal rigidity appears to mandate a great deal of symmetry. In this talk we will see several nontrivial graphs (and graph families) t hat are conformally rigid. The techniques involve semidefinite programming and some symmetry reduction.  (Joint work with Stefan Steinerberger.)\n\n Note: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://was hington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250129T153000 DTEND;TZID=America/Los_Angeles:20250129T170000 LAST-MODIFIED:20250128T194231Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Conformally rigid graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-29/conformally-rigid-graphs END:VEVENT BEGIN:VEVENT UID:5edb6efd-f211-49e7-8a89-aeaa8e530c07 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250123T225211Z DESCRIPTION:Speaker: Yuchao Yi\, UCSD\n\nConsider a semilinear Dirac equati on with some smooth\nnon-linearity F(u)\, and suppose the solution can be observed at some\nfixed time T for any sufficiently small initial data. We call the map\nthat maps initial data at time 0 to solution at time T the bounded\ntime scattering map\, and ask if this map uniquely determines the \nnon-linearity. In this talk\, I will show that if the first and second\n derivatives of the non-linearity at 0 are given\, then the\nnon-linearity can be uniquely determined on a bounded region around 0\,\nwhere the size of the region depends on the available set of initial\ndata. The proof rel ies on higher order linearization\, microlocal\nanalysis\, and a limiting argument for the collision point. A similar\nresult can be obtained when t he non-linearity also depends on the\nspace variable (but independent of t ime).\n\n \n\n \n\n \n\n\n\n \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250129T160000 DTEND;TZID=America/Los_Angeles:20250129T170000 LAST-MODIFIED:20250123T225211Z LOCATION:PDL C-038 SUMMARY:: Bounded time inverse scattering for nonlinear Dirac equation Join t w IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-29/bounded-time-inverse-scat tering-nonlinear-dirac-equation-joint-w-ip-seminar END:VEVENT BEGIN:VEVENT UID:fb597290-ffbb-49fe-8965-3ee6cd734c40 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250127T195315Z DESCRIPTION:Speaker: Vasily Ilin\n\nHow does ChatGPT make pictures? Turns o ut it's a lot of SDEs\, probability and a bit of optimization. I will intr oduce the basic building blocks of the algorithm\, such as reversing the O U process\, and will show some examples using the MNIST dataset of handwri tten digits.  DTSTART;TZID=America/Los_Angeles:20250130T123000 DTEND;TZID=America/Los_Angeles:20250130T133000 LAST-MODIFIED:20250127T195406Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Diffusion Generative Modeling Making Pictures from Nois e with Math TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-30/gsas-nbsp-diffusion-gener ative-modeling-making-pictures-noise-math END:VEVENT BEGIN:VEVENT UID:39fee765-b918-46b3-b7ef-5647a5dabcf0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20250127T193550Z DESCRIPTION:Speaker: Vasily Ilin\n\nHow does ChatGPT make pictures? Turns o ut it's a lot of SDEs\, probability and a bit of optimization. I will intr oduce the basic building blocks of the algorithm\, such as reversing the O U process\, and will show some examples using the MNIST dataset of handwri tten digits.  DTSTART;TZID=America/Los_Angeles:20250130T123000 DTEND;TZID=America/Los_Angeles:20250130T133000 LAST-MODIFIED:20250127T193952Z LOCATION:PDL C-401 SUMMARY:: Diffusion Generative Modeling Making Pictures from Noise with Mat h TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-30/diffusion-generative-mode ling-making-pictures-noise-math END:VEVENT BEGIN:VEVENT UID:f697d3ff-b8d6-469e-81db-3e93ee69db5d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250124T223448Z DESCRIPTION:Speaker: Farbod Shokrieh\, UW\n\nI will discuss some connection s between the theory of heights on abelian varieties and Berkovich analyti c spaces. For example\, some refinements and generalizations of classical results of Néron and of Tate will be presented\, where 'skeleta' of Berkov ich spaces (viewed as 'tropical' spaces) play a central role. DTSTART;TZID=America/Los_Angeles:20250130T150000 DTEND;TZID=America/Los_Angeles:20250130T160000 LAST-MODIFIED:20250124T223518Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Heights and Berkovich tropical nbsp space s TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-30/student-ag-seminar-nbsp-h eights-and-berkovich-tropical-nbsp-spaces END:VEVENT BEGIN:VEVENT UID:e1626060-97e7-4201-8030-14e836ba51f9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250127T195958Z DESCRIPTION:Speaker: Zawad Chowdhury\, University of Washington\n\nWhat do random walks\, Gale duality and toric ideals have in common? They can all be used to prove results about graphical designs! Graphical designs are de fined using graph theory\, but they touch fields as far-flung as probabili ty theory\, polytopes and algebraic geometry! In this talk we'll see three different graphical design examples and use them to visit connections to three different fields of math.\n\nZoom Link: https://washington.zoom.us/j /92849568892 DTSTART;TZID=America/Los_Angeles:20250131T143000 DTEND;TZID=America/Los_Angeles:20250131T152000 LAST-MODIFIED:20250127T195958Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Graphical Design is My Passion TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-01-31/1-2-3-seminar-graphical-d esign-my-passion END:VEVENT BEGIN:VEVENT UID:2f652a53-0918-44ea-a2eb-9d092b8c560e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250122T220516Z DESCRIPTION:Speaker: Mufan Li\, Princeton University\n\nRecent advances in deep learning performance have all relied on scaling up the number of para meters within neural networks\, consequently making asymptotic scaling lim its a compelling approach to theoretical analysis. However\, current resea rch predominantly focuses on infinite-width limits\, unable to adequately analyze the role of depth in deep networks. In this talk\, we explore a un ique approach by studying the proportional infinite-depth-and-width limit.  \n\n \n\nFirstly\, we show that large depth networks necessarily require a shaping of the non-linearities to achieve a well-behaved limit. We then characterize the limiting distribution of the shaped network at initializa tion via a stochastic differential equation (SDE) for the feature covarian ce matrix. Furthermore\, in the linear network setting\, we can characteri ze the spectrum of the covariance matrix in the large data limit via a geo metric variant of Dyson Brownian motions.  DTSTART;TZID=America/Los_Angeles:20250203T143000 DTEND;TZID=America/Los_Angeles:20250203T153000 LAST-MODIFIED:20250122T220516Z LOCATION:CLK 219 SUMMARY:: The Proportional Scaling Limit of Neural Networks nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-03/proportional-scaling-limi t-neural-networks-nbsp END:VEVENT BEGIN:VEVENT UID:d928f8ce-a1c3-4e7a-9ac7-655df802a24c DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210351Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n \n Communications - Athreya\n PIMS opportunity - Athreya\n Centenary celeb ration - Pal & Viray\n \n \n Committee Reports\n \n PIMS co-director search - P aternain\n \n \n New Business\n Executive Session\n Adjournment\n\n\nMINUTES\n \nThe regular meeting of the faculty of the Department of Mathematics was held in PDL C-38 at 3:30pm PST\, February 4\, 2025. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.\n\nChai r's Remarks\n\nCongratulations to Bobby Wilson for his Presidential Early Career Award for Scientists and Engineers (PECASE) and to Cynthia Vinzant for her Michael and Sheila Held Prize.\n\nGrad admissions season is underw ay. We may need to anticipate a smaller incoming class and some short-term adjustments with the goal of long-term changes for the graduate program. \n\nClass A Legislation 176: Defining the Core Elements of Effective Teach ing in the Faculty Code was passed at the Senate and approved by President Cauce. The department must re-evaluate our teaching practices around the five core elements now listed in the amended code.\n\nThe previous meeting ’s minutes were approved by unanimous consent.\n\nAnnouncements\n\nThe Com munications Committee has created a Google form for collecting news within the department for publication in our various platforms and to help promo te the department as a whole within the University.\n\nPIMS is conducting a search for a new Co-Director Programs. Gabriel Paternain and Jayadev Ath reya can answer questions about the position.\n\nSoumik Pal and Bianca Vir ay are putting together a historical webpage for the department’s centenni al in 2026/27. Please send any historical info to the committee including short blurbs on how your own research community has developed at the UW. T his page will detail all the ways that our department has contributed to t he University and to the Seattle area over the last 100 years. Also\, when inviting speakers it would be nice if they had some UW connection so they can be linked to the celebration. Any and all feedback is welcome.\n\nCom mittee Reports\n\nGabriel Paternain has been the interim PIMS Co-Director International and they are now searching for someone to take over the posi tion permanently. The deadline for applications is March 31st. If you woul d like to know more about the position and would like to chat with Gabriel \, please feel free to reach out to him directly.\n\nNew Business\n\nThe T eaching Faculty Committee recommends converting the TA training sessions t hat are held in the Fall for MATH 124 and 125 into classes to encourage at tendance and treat it more as a professional development course and possib ly even for credit. A Canvas page can include resources that could benefit new faculty and AAPs in addition to the TAs.\n\nAdditionally\, the commit tee is also considering refreshing the grading policy for some of the cour ses. They’ll put together a proposal for the UPC.\n\nThe committee shared some of the valuable ways individual teaching faculty have contributed to the department and the University as a whole\, such as Charles Camacho’s w ork with the STARS program and Andy Loveless’s strategies for handling stu dent accommodations.\n\nADJOURNMENT\n\nThe meeting passed into executive s ession at 4:18pm. DTSTART;TZID=America/Los_Angeles:20250204T153000 DTEND;TZID=America/Los_Angeles:20250204T163000 LAST-MODIFIED:20250306T235426Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-04/faculty-meeting END:VEVENT BEGIN:VEVENT UID:820e564d-a382-412e-bf85-955ac43bbbd7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250126T183921Z DESCRIPTION:Speaker: Josh Hinman\, University of Washington\n\nAbstract:\n \nWe generalize a result about the face numbers of polytopes to the realm of CW spheres. Let X be a CW sphere such that:\n\n\n\n X is strongly regula r. (The intersection of any two faces is a face.)\n X is shellable. (We can build X\, facet by facet\, so that each facet intersects with the previou s ones in a predictable way.) \n\n\nThen X is a 'squishy polytope'\, resem bling a polytope topologically and combinatorially but not geometrically. We prove a set of linear lower bounds on the face numbers of X in terms of the number of facets. To do so\, we translate an argument about solid ang les into an argument about shellings.\n\n \n\n\nNote: This talk begins wit h a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk s tarts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335 974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250205T153000 DTEND;TZID=America/Los_Angeles:20250205T170000 LAST-MODIFIED:20250203T074859Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Face Numbers of Squishy Polytopes TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-05/face-numbers-squishy-poly topes END:VEVENT BEGIN:VEVENT UID:eaa5928c-95ff-4e61-8d25-2243269c6883 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250203T051339Z DESCRIPTION:Speaker: Ignacio Tejeda\, University of Washington\n\nThe geome try of measures and sets in Euclidean space can be understood through the study of various analytic quantities. One of them\, the density\, has play ed a key role in consolidating our understanding of rectifiability\, as we ll as motivating the development of other key notions in geometric measure theory. The aim of this talk is to discuss recent quantitative problems i n this direction that are motivated by the following question: what can be said about the geometry of a measure whose density ratio converges at a H ölder rate? We will explore recent results that answer this question\, wit h emphasis on the case where the notion of density comes from a Riemannian setting. DTSTART;TZID=America/Los_Angeles:20250206T123000 DTEND;TZID=America/Los_Angeles:20250206T133000 LAST-MODIFIED:20250203T051339Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Geometry of measures with H lder density bounds in a Ri emannian setting nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-06/gsas-nbsp-geometry-measur es-h-lder-density-bounds-riemannian-setting-nbsp END:VEVENT BEGIN:VEVENT UID:239083f5-7a27-4f70-9f0f-322c99b154e7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250203T213846Z DESCRIPTION:Speaker: Bianca Viray\, UW\n\nFor geometrically rational surfac es\, determining their rationality over a nonclosed field reduces to a que stion about the Galois action on the finite collection of curves that gene rate the Picard group.  For geometrically rational threefolds\, however\, the question becomes much more complicated and many aspects remain open. I n this talk\, we consider the rationality question for certain conic bundl e threefolds.  In this case\, we show that the so-called intermediate Jaco bian torsor (IJT) rationality obstruction of Hassett--Tschinkel and Benois t--Wittenberg can be framed in terms of arithmetically interesting torsors under a Prym variety.  Using the structure of these torsors we show that the IJT obstruction characterizes rationality for these conic bundles over fields with trivial 2-torsion in the Brauer group\, but that it is not st rong enough to characterize rationality over arbitrary fields. This is joi nt work with S. Frei\, L. Ji\, S. Sankar\, and I. Vogt. (All technical ter ms in this abstract will be defined in the talk.) DTSTART;TZID=America/Los_Angeles:20250206T150000 DTEND;TZID=America/Los_Angeles:20250206T160000 LAST-MODIFIED:20250204T002144Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp On rationality of conic bundles threefold s over nonclosed fields TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-06/student-ag-seminar-nbsp-r ationality-conic-bundles-threefolds-over-nonclosed END:VEVENT BEGIN:VEVENT UID:e1910189-b864-4557-b12c-53c5ee7d2efe DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250203T092028Z DESCRIPTION:Speaker: Bobby Wilson\n\nIn this talk\, we will discuss coverin g substantial subsets of one-dimensional sets in the plane with one-dimens ional Lipschitz curves and graphs. It is generally not feasible to cover a n entire one-dimensional set with a Lipschitz curve. We aim to quantify ex actly how poorly a purely unrectifiable fractal set can be covered by a Li pschitz crve. DTSTART;TZID=America/Los_Angeles:20250206T163000 DTEND;TZID=America/Los_Angeles:20250206T180000 LAST-MODIFIED:20250203T092028Z LOCATION:C-401 SUMMARY:: Covering Sets by Lipschitz Graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-06/covering-sets-lipschitz-g raphs END:VEVENT BEGIN:VEVENT UID:7040bf1c-099d-4537-8ac9-bbbd12ce9723 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250201T034356Z DESCRIPTION:Speaker: Alex Waugh\, University of Washington\n\nOne can attem pt to study a (pointed) space X by probing it with (pointed) maps from oth er (pointed) spaces Y. It turns out that probing with maps from Y = S^n pr ovides a lot of information about X. In particular\, if we relax 'maps' to 'maps up to homotopy'\, the collection of such maps form the nth homotopy group of X. These are strong invariants in the sense that a map between c onnected CW-complexes is an equivalence if it induces isomorphisms on nth homotopy groups for each n. However\, when we pass to 'maps up to homotopy ' we are destroying interesting information about maps between Y and X. In this talk we will study the space of maps from spheres S^n to 'nice' spac es X\, how this relates to the study of homotopy groups and homology group s of X\, and\, time permitting\, how the study of such spaces naturally le ad to the first theorem in stable homotopy theory\, the Freudenthal suspen sion theorem.\n\nZoom Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250207T143000 DTEND;TZID=America/Los_Angeles:20250207T152000 LAST-MODIFIED:20250201T034806Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar A gentle introduction to loop spaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-07/1-2-3-seminar-gentle-intr oduction-loop-spaces END:VEVENT BEGIN:VEVENT UID:91b603ca-b2a8-4c31-bc2f-f062ecc7c248 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250204T171457Z DESCRIPTION:Speaker: Lucas Villagra (SFU)\n\nLet f and g be two newforms wi th equal coefficient fields. In this talk we will see how a congruence bet ween the residual Galois representations of f and g for a sufficiently lar ge prime p implies strong conditions between the algebras of endomorphisms of the abelian varieties attached to f and g. Then\, we will see an appli cation of such a result in the study of some generalized Fermat equations. DTSTART;TZID=America/Los_Angeles:20250211T110000 DTEND;TZID=America/Los_Angeles:20250211T115000 LAST-MODIFIED:20250204T171457Z LOCATION:PDL C-401 SUMMARY:: On endomorphism algebras of GL2 type abelian varieties and Diopha ntine applications TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-11/endomorphism-algebras-gl2 -type-abelian-varieties-and-diophantine-applications END:VEVENT BEGIN:VEVENT UID:3fb61bd5-3459-4d1e-825b-e67bfddc5eee DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250208T232239Z DESCRIPTION:Speaker: Shangjie Zhang\, UCSD\n\nWe introduce the $C_{p^n}$-Ma howald invariant: a relation $\pi_\star \smash{S_{\raisemath{2pt}{C_{p^{n- 1}}}}}\rightharpoonup \pi_\ast S$ between the equivariant and classical st able stems which reduces to the classical Mahowald invariant when $n=1$. W e compute the $C_{p^n}$-Mahowald invariants of all elements in the Burnsid e ring $\smash{A(C_{p^{n-1}}) = \pi_0S_{\raisemath{2pt}{C_{p^{n-1}}}}}$\, extending Mahowald and Ravenel's computation of $M_{C_p}(p^k)$. As a conse quence\, we determine the image of the $C_p$-geometric fixed point map $\P hi^{C_p} \colon \pi_V S_{\raisemath{2pt}{C_{p^{n}}}}\rightarrow \pi_0 \sma sh{S_{\raisemath{2pt}{C_{p^{n}}/C_p}}}\cong A(C_{p^{n-1}})$ when $V$ is fi xed point free\, extending classical theorems of Bredon\, Landweber\, and Iriye for $n=1$.\n\nOur work exhibits patterns suggesting an equivariant A dams periodicity. We refine this to produce equivariant lifts of Adams' $v _1$-self maps on Moore spectra. DTSTART;TZID=America/Los_Angeles:20250211T153000 DTEND;TZID=America/Los_Angeles:20250211T163000 LAST-MODIFIED:20250208T232257Z LOCATION:PDL C-401 SUMMARY:: C p n Mahowald invariants and v 1 peridicity nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-11/c-p-n-mahowald-invariants -and-v-1-peridicity-nbsp END:VEVENT BEGIN:VEVENT UID:95d336ac-d81c-41ba-b373-c9d49bb7c65d DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250123T205410Z DESCRIPTION:Speaker: Rainie Heck\n\nJoin Zoom Meeting\n\nAdvisor: Thomas Ro thvoss\n\nApplications of Discrepancy Theory to Machine Learning DTSTART;TZID=America/Los_Angeles:20250212T110000 DTEND;TZID=America/Los_Angeles:20250212T120000 LAST-MODIFIED:20250211T164818Z LOCATION:Remote (zoom) SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-12/final-exam END:VEVENT BEGIN:VEVENT UID:8af43d3e-1b99-495b-bac5-96e93ba74350 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250126T183959Z DESCRIPTION:Speaker: Tracy Chin\, University of Washington\n\nAbstract:\n\n Delta matroids are a generalization of matroids that arise naturally from combinatorial objects such as matchings on graphs and principal minors of symmetric and skew symmetric matrices. In this talk\, we will define valua ted delta matroids and explore their connection with principal minors of H ermitian matrices. This generalizes work by Rincón on valuated even delta matroids and skew symmetric matrices. Based on joint work with Nathan Cheu ng\, Gaku Liu\, and Cynthia Vinzant.\n\nNote: This talk begins with a pre- seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMee ting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250212T153000 DTEND;TZID=America/Los_Angeles:20250212T170000 LAST-MODIFIED:20250206T065059Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Valuated Delta Matroids and Principal Minors TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-12/valuated-delta-matroids-a nd-principal-minors END:VEVENT BEGIN:VEVENT UID:959e34e8-2b8a-4d30-8ce4-87470926ee99 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250210T044908Z DESCRIPTION:Speaker: Emily Casey\, Garrett Mulcahy (University of Washingto n\, Seattle)\n\nJoin us at GSAS for an exciting double feature this week! Emily will present on her recent research in Geometric Measure Theory and Garrett will provide a primer in optimal transport. The titles and abstrac ts are given below.\n\nRectifiability and anisotropic singular integral op erators\n\nSince the work of Mattila and Preiss in 1995\, it’s been known that for a Radon measure with reasonable density assumptions\, the almost everywhere existence of principal values of the Riesz transform is equival ent to the measure being rectifiable. In ongoing work with Goering\, Toro\ , and Wilson\, we extend this result of Mattila and Preiss to anisotropic Riesz kernels. In this talk\, we will discuss the motivation in characteri zing rectifiable measures in an anisotropic setting.\n\nIntroduction to Op timal Transport\n\nOriginally posed in the 18th century by Gaspard Monge\, the problem central to optimal transport is to transport a unit mass in s ome shape (i.e. a probability measure) into another shape while doing the least amount of work. This expository talk will provide a friendly introdu ction to optimal transport via closely considering measures supported on f initely many points.  DTSTART;TZID=America/Los_Angeles:20250213T123000 DTEND;TZID=America/Los_Angeles:20250213T133000 LAST-MODIFIED:20250210T191559Z LOCATION:PDL C-401 SUMMARY:: GSAS Geometric Measure Theory and Optimal Transport Double Featur e nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-13/gsas-geometric-measure-th eory-and-optimal-transport-double-feature-nbsp END:VEVENT BEGIN:VEVENT UID:4d6d6f94-525c-4558-b73f-8b559763336c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250207T013908Z DESCRIPTION:Speaker: Sándor Kovács\, UW\n\nThe coarse moduli space of curve s of genus \$g\$\,  \$g\$ greater than 1\, over the complex numbers is a h yperbolic analytic space and hence negatively curved. Curvature is hard to translate to algebraic terms\, but hyperbolicity has aspects that lend th emselves to algebraic analogs. For instance\, Brody hyperbolicity asks whe ther there are non-trivial holomorphic maps from \$\mathbb{C}^*\$ to a giv en space. This more or less corresponds to whether there are non-trivial r egular morphisms from \$\mathbb{A}^1 \setminus \{0\}\$ or abelian varietie s. This later notion is purely algebraic and has received considerable att ention in the past several decades. DTSTART;TZID=America/Los_Angeles:20250213T150000 DTEND;TZID=America/Los_Angeles:20250213T160000 LAST-MODIFIED:20250207T013950Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Moduli spaces of are negatively curved TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-13/student-ag-seminar-nbsp-m oduli-spaces-are-negatively-curved END:VEVENT BEGIN:VEVENT UID:528a9082-8572-4c40-b794-b900914c782a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250210T202812Z DESCRIPTION:Speaker: Jonathan Niño-Cortes\, University of Washington\n\nHig her-rank numerical ranges are a generalization of the classical numerical range\, which has been extensively studied in linear algebra and operator theory. This talk will introduce the concept of higher-rank numerical rang es and explore their properties from the perspective of real algebraic geo metry. To illustrate the key concepts\, I will present three concrete exam ples that showcase the diverse behavior and rich structure of higher-rank numerical ranges.\n\nZoom Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250214T143000 DTEND;TZID=America/Los_Angeles:20250214T152000 LAST-MODIFIED:20250210T202829Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Exploring Higher Rank Numerical Ranges TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-14/1-2-3-seminar-exploring-h igher-rank-numerical-ranges END:VEVENT BEGIN:VEVENT UID:3e2f1f48-b56b-442a-8459-9b9f972114be DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20240904T211726Z DESCRIPTION:Speaker: Bryna Kra\, Northwestern University\n\nSince Szemeredi 's Theorem and Furstenberg's proof thereof using ergodic theory\, dynamica l methods have been used to show the existence of numerous patterns in set s of positive upper density. These tools have led to uncovering new patter ns that occur in any sufficiently large set of integers\, but until recent ly all such patterns have been finite. Resolving questions and conjectures of Erdos\, we use dynamical methods to prove a density version of the fin ite sums theorem of Hindman. This is joint work with Joel Moreira\, Floria n Richter\, and Donald Robertson. DTSTART;TZID=America/Los_Angeles:20250214T153000 DTEND;TZID=America/Los_Angeles:20250214T163000 LAST-MODIFIED:20250204T213735Z LOCATION:ECE 125 SUMMARY:: The density finite sums theorem TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-14/density-finite-sums-theor em END:VEVENT BEGIN:VEVENT UID:b4103c85-4091-4fb2-b1e4-f02fc11958e8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250215T073858Z DESCRIPTION:Speaker: Davide Gori (Sapienza)\n\n\n\n\n\n\nPre-talk: Moduli s pace of curves\nI will introduce some basics on moduli space of curves and Geometric Invariant Theory (GIT). Time permitting\, I will also discuss g ood moduli spaces.\n\nTitle: Alternative Modular Compactifications of M_{g \,n} via Cluster Algebras with applications to the MMP of \overline{M}_{g\ ,n}\nAbstract:\nWe will discuss modular compactifications of M_{g\,n} (the moduli space of smooth curves) and their birational geometry within the f ramework of the Hassett-Keel program. By applying S- and \Theta-completene ss criteria\, we classify the open substacks of canonically polarized curv es with nodes\, cusps\, and tacnodes having a proper good moduli space. We transform the problem into a combinatorial one\, where compactifications and flips can be described using cluster algebra theory. This approach yie lds a complete description of the Q-factorialization fan of \overline{M}_{ g\,n}(7/10) as a cluster fan.\n\n \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250218T133000 DTEND;TZID=America/Los_Angeles:20250218T153000 LAST-MODIFIED:20250215T073858Z LOCATION:PDL C-38 SUMMARY:: Alternative Modular Compactifications of M g n via Cluster Algebr as with applications to the MMP of overline M g n TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-18/alternative-modular-compa ctifications-m-g-n-cluster-algebras-applications-mmp END:VEVENT BEGIN:VEVENT UID:64643a44-63e0-4ccb-8782-7a5dab0c9bb2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250217T042737Z DESCRIPTION:Speaker: Yunze Lu\, UCSD\n\nThe homotopy fixed points of Lubin- Tate theories are central objects in chromatic homotopy theory\, as they a re building blocks of $K(n)$-local spheres. This talk will describe the us e of equivariant structure and vanishing line result to compute the $RO(Q_ 8)$-graded homotopy fixed points spectral sequence at height 2 and prime 2 . This is joint work with Zhipeng Duan\, Hana Jia Kong\, Guchuan Li\, and Guozhen Wang. DTSTART;TZID=America/Los_Angeles:20250218T153000 DTEND;TZID=America/Los_Angeles:20250218T163000 LAST-MODIFIED:20250217T042849Z LOCATION:PDL C-401 SUMMARY:: RO G graded homotopy fixed point spectral sequence for height 2 M orava E theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-18/ro-g-graded-homotopy-fixe d-point-spectral-sequence-height-2-morava-e-theory END:VEVENT BEGIN:VEVENT UID:c97b5110-891f-4e5a-ae7d-298a33f0645a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250218T214244Z DESCRIPTION:Speaker: Jinwoo Sung\, University of Chicago\n\nConformal weldi ng is an operation that encodes Jordan curves on the Riemann sphere in ter ms of circle homeomorphisms. Thus\, composition defines a natural group ac tion of circle homeomorphisms on Jordan curves. In this talk\, I will disc uss a Cameron–Martin type quasi-invariance result for the SLE loop measure under the right group action by Weil–Petersson homeomorphisms. While this result was hinted by Carfagnini and Wang's identification of Loewner ener gy as the Onsager–Machlup action functional of the SLE loop measure\, the group structure of SLE welding has been little understood previously.\n\nO ur proof is based on the characterization of the composition operator asso ciated with Weil–Petersson circle homeomorphisms using Hilbert–Schmidt ope rators and the description of the SLE loop measure in terms of the welding of two independent quantum disks by Ang\, Holden\, and Sun. This is joint work with Shuo Fan (Tsinghua University and IHES). DTSTART;TZID=America/Los_Angeles:20250219T143000 DTEND;TZID=America/Los_Angeles:20250219T153000 LAST-MODIFIED:20250218T234842Z LOCATION:PDL C-401 SUMMARY:: A quasi invariant group action on SLE loops TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-19/quasi-invariant-group-act ion-sle-loops END:VEVENT BEGIN:VEVENT UID:b8e7d979-56ac-4952-90b6-42cc9faa752e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250217T212040Z DESCRIPTION:Speaker: Ricky Liu\, University of Washington\n\nAbstract:\n\nG iven a poset P\, a plane partition of shape P is an order preserving map f rom P to the nonnegative integers. A result of Proctor states that a recta ngular poset and its associated trapezoidal poset have the same number of plane partitions of each height. We give a new bijective proof of this res ult using a tool from dynamical algebraic combinatorics called rowmotion. This bijection arises as the tropicalization of an equivariant birational map between labelings of the rectangle and trapezoid with respect to birat ional rowmotion\, which also proves a conjecture of Williams that biration al rowmation on trapezoidal posets has finite order. Joint work with Josep h Johnson.\n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meetin g: https://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250219T153000 DTEND;TZID=America/Los_Angeles:20250219T170000 LAST-MODIFIED:20250217T213703Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Plane partitions and rowmotion on rectangular and trapezoidal pos ets TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-19/plane-partitions-and-rowm otion-rectangular-and-trapezoidal-posets END:VEVENT BEGIN:VEVENT UID:bc64b710-a6c7-4eb4-ad89-6286645b747d DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250218T162148Z DESCRIPTION:Speaker: Garrett Mulcahy\, University of Washington\, Seattle\n \nOriginating in the 18th century\, optimal transport is a mathematical fi eld concerned with moving one probability distribution to another in the m ost efficient manner. In the past decade\, interest in optimal transport h as increased as many machine learning and data science tasks require quant ifying some notion of disagreement between probability distributions. In p articular\, the entropic regularized variant of the optimal transport prob lem has garnered much attention as it is efficiently computable. The solut ion to this variant\, known as the Schrödinger bridge\, is an object with its own physical motivation and storied history. This talk (practice for a n upcoming general exam) will present recent and current projects that aim to better quantify the behavior of the Schrödinger bridge in the small te mperature regime by developing tight approximations with diffusion process es. We will then demonstrate that this tight approximation can be leverage d to create discrete approximations of Wasserstein gradient flows (curves of steepest descent) that advance understanding about the behavior of the Transformer neural architecture. DTSTART;TZID=America/Los_Angeles:20250220T123000 DTEND;TZID=America/Los_Angeles:20250220T133000 LAST-MODIFIED:20250218T162535Z LOCATION:PDL C-401 SUMMARY:: GSAS Approximating Schr dinger Bridges TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-20/gsas-approximating-schr-d inger-bridges END:VEVENT BEGIN:VEVENT UID:62d351ad-dc7e-462d-82d0-be719c83d0cd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250213T215622Z DESCRIPTION:Speaker: Ting Gong\, UW\n\n \n\nThe moduli space of semistable vector bundles of fixed rank and determinant on curves has been studied ex tensively since the 1960s. It has been proven to admit a moduli space by M umford\, Newstead via GIT\, and to admit a good moduli space by Alper. The construction of specific ones is due to Narasimhan\, Ramanan\, Drezet\, B eauville\, etc.  And the moduli space of semistable twisted vector bundles was constructed and studied by Lieblich\, Yoshioka\, Caldaradu in the ear ly 2000. In this ongoing project\, we construct and compute the moduli spa ce of semistable vector bundles on gerbes of certain rank and determinant and tie them to the classical constructions stated above. DTSTART;TZID=America/Los_Angeles:20250220T150000 DTEND;TZID=America/Los_Angeles:20250220T160000 LAST-MODIFIED:20250213T215824Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp The moduli space of semistable vector bun dles of fixed rank and determinant on g TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-20/student-ag-seminar-nbsp-m oduli-space-semistable-vector-bundles-fixed-rank-and END:VEVENT BEGIN:VEVENT UID:723ae79e-d8b6-4872-bad7-286f998de649 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250215T070949Z DESCRIPTION:Speaker: Arkamouli Debnath\, University of Washington\n\nFundam ental group is one of the first algebraic invariants one learns in algebra ic topology. Beyond the definition\, one learns how to associate the funda mental group with covering spaces. The issue with this approach in algebra ic geometry is the lack of a universal cover (due to our requirement for f inite type schemes). We use an analogue of covering spaces\, namely finite etale maps\, to define the Etale fundamental group. Yet another issue wit h this\, is the requirement that the base point be in a separable extensio n rather than the field itself (i.e the difference between a rational poin t and a point in a field extension). We resolve that by introducing the No ri fundamental group. In this talk I'll give examples of all 3 kinds of 'f un'damental groups.\n\nZoom Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250221T143000 DTEND;TZID=America/Los_Angeles:20250221T152000 LAST-MODIFIED:20250215T071006Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar The FUN in FUNdamental groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-21/1-2-3-seminar-fun-fundame ntal-groups END:VEVENT BEGIN:VEVENT UID:66b9324f-df7f-47cd-b87d-1948cd99ec98 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250218T162710Z DESCRIPTION:Speaker: Garrett Mulcahy\n\nAdvisor: Soumik Pal DTSTART;TZID=America/Los_Angeles:20250224T143000 DTEND;TZID=America/Los_Angeles:20250224T153000 LAST-MODIFIED:20250218T211633Z LOCATION:CLK 219 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-24/general-exam END:VEVENT BEGIN:VEVENT UID:3bad8822-8393-4516-a101-dc80deb81760 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241219T215948Z DESCRIPTION:Speaker: Boris Solomyak (University of Bar-Ilan)\n\nTBA\n\n  DTSTART;TZID=America/Los_Angeles:20250225T133000 DTEND;TZID=America/Los_Angeles:20250225T153000 LAST-MODIFIED:20241219T215948Z LOCATION:PDL C-401 SUMMARY:: TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-25/tba END:VEVENT BEGIN:VEVENT UID:2add74dc-2abb-402b-8687-d0e5ca1689a2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250130T062843Z DESCRIPTION:Speaker: Boris Solomyak (Bar-Ilan and UW)\n\n\nWeak mixing is o ne of the most basic properties in ergodic theory\, which has several equi valent\, seemingly rather different\, formulations. For instance\, weak mi xing is characterized by convergence of absolute Ces\`aro averages or\, al ternatively\, by the absence of non-trivial discrete spectrum. A natural q uestion is how to make these properties quantitative. I will start by intr oducing the notion of quantitative weak mixing in a general setting. Next I will briefly survey some recent work of several authors on quantitative weak mixing and spectral properties for parabolic systems\, such as interv al exchanges and translation flows. I will then focus on substitutions\, w hich often serve as 'test cases' for the more complicated systems. This pa rt is based on collaboration with A.I. Bufetov during the last 10 years an d on recent work with A.I. Bufetov and J. Marshall-Maldonado. DTSTART;TZID=America/Los_Angeles:20250225T133000 DTEND;TZID=America/Los_Angeles:20250225T153000 LAST-MODIFIED:20250130T062923Z LOCATION:PDL C-401 SUMMARY:: Quantitative weak mixing nbsp for substitution dynamical systems TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-25/quantitative-weak-mixing- nbsp-substitution-dynamical-systems END:VEVENT BEGIN:VEVENT UID:cc01c735-8665-487b-bf33-e60c3773832a DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250218T162532Z DESCRIPTION:Speaker: Haoming Ning\n\nAdvisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20250225T140000 DTEND;TZID=America/Los_Angeles:20250225T150000 LAST-MODIFIED:20250218T162651Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-25/general-exam END:VEVENT BEGIN:VEVENT UID:9222b3a9-0c2a-44cc-8aff-9a396c3d6e8b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250222T185006Z DESCRIPTION:Speaker: Haoming Ning (UW)\n\n\n\n\n\n\nTitle: Du Bois singular ities and the Minimal Model Program\nAbstract: Singularities play a crucia l role in the classification of algebraic varieties. They naturally arise on degenerations of smooth varieties and on birational models of higher-di mensional varieties. In this talk\, I will survey key singularity classes through the lens of the Minimal Model Program\, the standard framework for birational classification. In particular\, I will discuss its connection with Du Bois singularities\, an important class with extremely useful coho mological properties. If time allows\, I will also introduce higher Du Boi s singularities\, a recent generalization motivated by developments in Hod ge theory.\n\n \n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250225T143000 DTEND;TZID=America/Los_Angeles:20250225T153000 LAST-MODIFIED:20250222T185020Z LOCATION:PDL C-38 SUMMARY:: Du Bois singularities and the Minimal Model Program TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-25/du-bois-singularities-and -minimal-model-program END:VEVENT BEGIN:VEVENT UID:7a588af3-493d-4213-8c01-63fdbd323757 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250217T213800Z DESCRIPTION:Speaker: Michael Tang\, University of Washington\n\nAbstract:\n \nThe generalized degree polynomial (GDP) of a tree is an invariant introd uced by Crew that enumerates subsets of vertices by size and number of int ernal and boundary edges. Aliste-Prieto et al. proved that the chromatic s ymmetric function of a tree\, introduced by Stanley\, linearly determines its GDP. We present several classes of information about a tree that are d etermined by its GDP (and thus its chromatic symmetric function). Examples include the double-degree sequence\, which enumerates edges by the pair o f degrees of their endpoints\, and the leaf adjacency sequence\, which enu merates vertices by degree and number of adjacent leaves. We also discuss a further generalization of the GDP which is also determined linearly by t he chromatic symmetric function. (This is joint work with Ricky Liu.)\n\nN ote: This talk begins with a pre-seminar (aimed at graduate students) at 3 :30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://wash ington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250226T153000 DTEND;TZID=America/Los_Angeles:20250226T170000 LAST-MODIFIED:20250220T074047Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Generalized degree polynomials of trees TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-26/generalized-degree-polyno mials-trees END:VEVENT BEGIN:VEVENT UID:116c317a-13cf-4bea-b37a-2d764dda3e79 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250223T211318Z DESCRIPTION:Speaker: Hyojeong Son (University of Washington\, Seattle)\n\nS ince its introduction in 1962\, the Gale Shapley algorithm has guaranteed the existence of at least one stable matching for every instance of the ma tching problem. This breakthrough has enabled numerous practical applicati ons. These include job placements\, school admissions\, and organ transpla nts where stability and optimality are essential. In this talk\, we review two significant developments in the analysis of stable matchings. First\, we examine the work of Karlin\, Oveis Gharan\, and Weber\, who proved tha t for any instance with $n$ participants\, the number of stable matchings is bounded above by $C^n$ for some universal constant $C$\, establishing a simply exponential upper bound. Second\, we explore the research of Hoffm an\, Levy\, and Mossel\, which shows that under Mallows distributed prefer ences the number of stable matchings grows exponentially\, with the growth rate depending continuously on the Mallows parameter $q$. DTSTART;TZID=America/Los_Angeles:20250227T123000 DTEND;TZID=America/Los_Angeles:20250227T133000 LAST-MODIFIED:20250223T211508Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Stable Matching TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-27/gsas-nbsp-stable-matching END:VEVENT BEGIN:VEVENT UID:746ecdeb-30e3-41b4-a1c1-116346e94803 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250221T032832Z DESCRIPTION:Speaker: Justin Bloom\, UW\n\nClassifying small rank finite gro up schemes over a field of positive characteristic is a hard problem\, and not much less difficult than classifying small rank Hopf algebras in gene ral. By adopting the language of moduli\, we can try to make sense of cert ain invariants defined on certain closed stratum of rank \$n\$ Hopf algebr as. In doing so we will generate interesting examples of Morita equivalent algebraic stacks. DTSTART;TZID=America/Los_Angeles:20250227T150000 DTEND;TZID=America/Los_Angeles:20250227T160000 LAST-MODIFIED:20250221T032844Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Morita equivalence of algebraic stacks an d flat families of Hopf algebras TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-27/student-ag-seminar-nbsp-m orita-equivalence-algebraic-stacks-and-flat-families END:VEVENT BEGIN:VEVENT UID:d800d549-19fd-4eca-b7f2-a1f5b08f0287 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250223T224529Z DESCRIPTION:Speaker: Mallory Dolorfino\, University of Washington\n\nLast w eek\, we saw some strange and\, from some points of view\, undesirable qua lities of the etale fundamental group. Namely\, the etale fundamental grou p of a point is usually not trivial\, and the etale fundamental group of S pecZ is 0. From a number theoretic perspective\, these  qualities of the e tale fundamental group make it a great tool for studying the arithmetic pr operties of schemes. In this talk\, we will elucidate this fact by computi ng the etale fundamental groups of certain fields\, generalizing the fact about SpecZ to rings of integers in arbitrary number fields\, and explorin g the arithmetic implications of Grothendieck's section conjecture.\n\nZoo m Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250228T143000 DTEND;TZID=America/Los_Angeles:20250228T152000 LAST-MODIFIED:20250223T224529Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar In defense of the etale fundamental group TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-28/1-2-3-seminar-defense-eta le-fundamental-group END:VEVENT BEGIN:VEVENT UID:cb8cbed9-6663-4ea3-9c8d-08f87d2168da DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20240913T235447Z DESCRIPTION:Speaker: Caroline Klivans\, Brown University\n\nThere is a rich history of domino tilings in two dimensions. Through a variety of techniq ues we can answer questions such as: how many tilings are there of a given region or what does a random tiling look like? These questions and their answers become significantly more difficult in dimension three and above. Despite this curse of dimensionality\, I will discuss recent advances in t he theory. I will also highlight problems that still remain open. DTSTART;TZID=America/Los_Angeles:20250228T153000 DTEND;TZID=America/Los_Angeles:20250228T163000 LAST-MODIFIED:20250218T214736Z LOCATION:ECE 125 SUMMARY:: Domino tilings beyond 2D TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-02-28/domino-tilings-beyond-2d END:VEVENT BEGIN:VEVENT UID:e3cd75e6-9755-4f68-bf14-3438191672b8 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250225T214251Z DESCRIPTION:Speaker: Mark Saul\, New York University Center for Mathematica l Talent/Julia Robinson Math Festival\n\nAbstract: How many eleven-pointed stars are there? How often does Christmas fall on a Tuesday? Can a power of two begin with the digit 7? Beginning with an examination of patterns o n Native American ceramics\, we will look at insights from number theory a nd analysis into periodic phenomena. DTSTART;TZID=America/Los_Angeles:20250302T130000 DTEND;TZID=America/Los_Angeles:20250302T140000 LAST-MODIFIED:20260121T213207Z LOCATION:ARC 147 SUMMARY:: Counting stars TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-02/counting-stars END:VEVENT BEGIN:VEVENT UID:dc68b6da-ea9d-449a-b705-d57a685519b2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250116T214118Z DESCRIPTION:Speaker: Fatma Kilinc-Karzan\n\nWe consider an online strategic classification problem where each arriving agent can manipulate their tru e feature vector to obtain a positive predicted label while incurring a co st that depends on the amount of manipulation. The learner seeks to predic t the agent's true label\, while having access to only the manipulated fea tures. After the learner releases their prediction\, the agent's true labe l is revealed. While previous algorithms such as the strategic perceptron guarantee finitely many mistakes under a separability assumption on agents ' true feature vectors\, we show that they fail to encourage agents to be truthful resulting in infinitely many manipulations. We show that promotin g truthfulness is intimately linked to obtaining adequate margin on the pr edictions\, and provide two new algorithms aimed at recovering the maximum margin classifier in the presence of strategic agent behavior in an onlin e setting. We prove finite mistake and finite manipulation guarantees as w ell as convergence to max margin classifier for our algorithms for a varie ty of agent cost structures under minor assumptions. We also provide a gen eralized version of the strategic perceptron algorithm along with its mist ake guarantees for different costs under some assumptions\, and also estab lish the necessity of the assumptions from the earlier literature to guara ntee its finite mistake bound. Our numerical study on real and synthetic d ata demonstrates that the new algorithms outperform previous ones in terms of number of mistakes\, number of manipulations\, and margin in various s ettings. This is joint work with Lingqing Shen\, Nam Ho-Nguyen and Khanh-H ung Giang-Tran.  DTSTART;TZID=America/Los_Angeles:20250303T153000 DTEND;TZID=America/Los_Angeles:20250303T163000 LAST-MODIFIED:20250228T205820Z LOCATION:Gates Commons CSE1 691 SUMMARY:: Mistake Manipulation and Margin Guarantees in Online Strategic Cl assification TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-03/mistake-manipulation-and- margin-guarantees-online-strategic-classification END:VEVENT BEGIN:VEVENT UID:1b099dc7-b1f6-41bd-8ff5-7deae76ab356 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250228T043539Z DESCRIPTION:Speaker: Dave Swinarski (Fordham University)\n\n\n\n\n\n\n\nPre seminar Title: Introduction to Geometric Invariant Theory\n\nAbstract: We introduce some of the basic concepts of geometric invariant theory (GIT)\, with examples.\n\n \n\n\n\nTitle: The worst destabilizing 1-parameter sub group for toric rational curves with one unibranch singularity\n\nAbstract : Kempf proved that when a point is unstable in the sense of Geometric Inv ariant Theory\, there is a 'worst'' destabilizing 1-parameter subgroup $\l ambda$. What are the worst 1-parameter subgroups for the unstable points i n the GIT problems used to construct the moduli space of curves $\overline {M}_g$? Here we consider Chow points of toric curves with one unibranch si ngular point. We translate the problem as an explicit problem in convex ge ometry (finding the closest point on a polyhedral cone to a point outside it). We prove that the worst 1-PS has a combinatorial description that per sists once the embedding dimension is sufficiently large\, and present som e examples. This is joint work with Joshua Jackson (Cambridge). \n\n\nForm at: beamer\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250304T134500 DTEND;TZID=America/Los_Angeles:20250304T154500 LAST-MODIFIED:20250228T043539Z LOCATION:PDL C-38 SUMMARY:: The worst destabilizing 1 parameter subgroup for toric rational c urves with one unibranch singularity TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-04/worst-destabilizing-1-par ameter-subgroup-toric-rational-curves-one-unibranch END:VEVENT BEGIN:VEVENT UID:0c16264e-e0cc-4958-9282-93d28ddd3871 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250217T214214Z DESCRIPTION:Speaker: Tien Le\, Seattle Pacific University\n\nAbstract:\n\nG iven a parabolic subgroup \( W_I \) of a Coxeter system \( (W\,S)\)\, the set of left cosets \( wW_I\)\, for \( I \subseteq S\, w \in W\)\, is well- studied. However\, the set of double cosets \( W_I w W_J \) for \( I\,J \s ubseteq S\) is a less studied object. I want to analyze the double cosets\ , in particular\, to investigate the conditions on \( I \) and \( J \) so that the set of double cosets carries some certain structure.\n\nThe main result that I have found is that: Let \$G\$ denote \$SL(n)\$ and let \$X\$ be a double flag variety \$G/P_1\times G/P_2\$. If \$c_G(X) \leq 1\$\, th en the inclusion poset of \$G\$-orbit closures in \$X\$ is a graded lattic e.\n\nNote: This talk begins with a pre-seminar (aimed at graduate student s) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https ://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250305T153000 DTEND;TZID=America/Los_Angeles:20250305T170000 LAST-MODIFIED:20250303T051836Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Diagonal orbits in double flag varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-05/diagonal-orbits-double-fl ag-varieties END:VEVENT BEGIN:VEVENT UID:304abe6b-7fda-403d-a344-e142d5709832 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250302T232953Z DESCRIPTION:Speaker: Linhang Huang\, University of Washington\, Seattle\n\n Torsion function is a classic concept in elasticity theory\, which has bee n studied for well over a hundred years. Given a bounded planar domain\, t he gradient of the torsion function measures the torsional stress of the d omain at each point. It is well-known that for convex domains\, the torsio nal stress is maximized at a point on the boundary. However\, what convex domain maximizes the torsional stress remains an open problem. The analysi s of the torsion function has been traditionally done with functional or p robabilistic techniques. In this talk\, I will go through my attempt to st udy the torsion function using conformal geometry. DTSTART;TZID=America/Los_Angeles:20250306T123000 DTEND;TZID=America/Los_Angeles:20250306T133000 LAST-MODIFIED:20250302T233114Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Torsion Function and Analytic Perturbation of Convex Do mains nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-06/gsas-nbsp-torsion-functio n-and-analytic-perturbation-convex-domains-nbsp END:VEVENT BEGIN:VEVENT UID:e9ce3601-7a6b-4c56-a293-4418bcaaab8c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250303T072736Z DESCRIPTION:Speaker: Julia Pevtsova\, UW\n\nOn a basic level\, tensor trian gular geometry (tt-geometry) associates to a (symmetric) tensor triangulat ed category a geometric invariant\, its Zariski spectrum\, roughly by trea ting the category as a commutative ring. On a slightly higher level\, the spectrum is the universal object which captures the support theory on the category\, shadowing sheaf supports in algebraic geometry. Either way\, gi ven a tensor triangulated category $T$\, calculating its spectrum \$\opera torname{Spec} T\$ gives an important global information about the category but also appears to be a highly nontrivial problem. I’ll mention some kno wn calculations which exploit the richness of the endomorphism ring of the unit object\, \$\operatorname{End}^*_T(1)\$\, going back to the work of Q uillen\, but also highlight some emerging new (and old) cases where \$\ope ratorname{End}^*_T(1)\$ is rather small and cannot possibly capture the en tire spectrum of \$T\$. DTSTART;TZID=America/Los_Angeles:20250306T150000 DTEND;TZID=America/Los_Angeles:20250306T160000 LAST-MODIFIED:20250303T072806Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Tensor triangular geometry in cohomologic ally poor categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-06/student-ag-seminar-nbsp-t ensor-triangular-geometry-cohomologically-poor END:VEVENT BEGIN:VEVENT UID:19fb595e-23f8-4851-b572-a6e31843de45 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250303T071218Z DESCRIPTION:Speaker: Cameron Wright\, University of Washington\n\nAs any ma troid theorist will enthusiastically tell you\, matroids exhibit many stro ng and subtle relationships with other areas of mathematics. The past two decades have brought a resurgence of interest in matroid theory\, with a c rowning jewel being the positive solution of Mason's conjecture in 2018 (b y two independent groups). To the surprise of many\, one proof of this res ult uses deep tools from algebraic geometry. We provide an introduction to the theory of matroids through graph theory and polyhedral geometry befor e building toward some deep connections with algebraic geometry which were used in the proof. In particular\, we will see that modern matroid theory benefits from relations with the geometry of toric varieties\, intersecti on theory\, and Hodge theory.\n\nZoom Link: https://washington.zoom.us/j/9 2849568892 DTSTART;TZID=America/Los_Angeles:20250307T143000 DTEND;TZID=America/Los_Angeles:20250307T152000 LAST-MODIFIED:20250303T071217Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Matroids and their Combinatorial Geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-07/1-2-3-seminar-matroids-an d-their-combinatorial-geometry END:VEVENT BEGIN:VEVENT UID:498fbe3b-9a94-4f1c-a104-e24fa35b5cd4 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20241009T173835Z DESCRIPTION:Speaker: Lauren K. Williams\, Harvard University\n\nThe framewo rk of mirror symmetry\, originally discovered by string theorists\, assert s that geometric objects come in 'mirror pairs' (X\,Y)\, where the enumera tive geometry (e.g. quantum cohomology) of X controls the complex geometry of the mirror dual Y.  Mirror symmetry for toric varieties and flag varie ties\, including Grassmannians\, has been extensively studied: a prototypi cal theorem is that the quantum cohomology of X is isomorphic to the Jacob ian ring of the mirror dual.  In joint work with Konstanze Rietsch\, we pr ove a 'polytopal mirror theorem'' for Grassmannians\, which says that the Newton Okounkov body of X coincides with the superpotential polytope of it s mirror dual Y.  We then use this polytopal mirror statement as an ansatz to construct some new mirrors\, in particular\, the mirror of each Schube rt variety in the Grassmannian.  Finally\, we observe that the lattice poi nts of our Newton-Okounkov bodies have a mysterious interpretation in term s of quantum cohomology.  This talk will be accessible to a general audien ce. DTSTART;TZID=America/Los_Angeles:20250307T153000 DTEND;TZID=America/Los_Angeles:20250307T163000 LAST-MODIFIED:20250218T215140Z LOCATION:ECE 125 SUMMARY:: Combinatorial aspects of mirror symmetry for the Grassmannian and its Schubert varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-07/combinatorial-aspects-mir ror-symmetry-grassmannian-and-its-schubert-varieties END:VEVENT BEGIN:VEVENT UID:b6f54f4a-cc7c-4e2e-abcb-57e28b3e1473 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210407Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n Committee Reports\n New Business\n Executive Session\n Adjournment\n\n\nMI NUTES\n\nThe regular meeting of the faculty of the Department of Mathemati cs was held in PDL C-38 at 3:30pm PST\, March 11\, 2025. Max Lieblich\, Ch air\, presided over the meeting. Rose Choi was the recording secretary.\n \nChair's Remarks\n\nMax Lieblich shared a fond memory of our former Depar tment Administrator\, Mary Sheetz\, who had recently passed away. She was a beloved member of the community and the floor was opened up to others wh o wished to share their stories. A celebration of her life will be held on August 16\, 2025. Details have been shared via email.\n\nA proposal was m ade to create a new project-based committee that merges the Diversity Comm ittee\, Outreach Efforts\, and the Communications Committee into a single entity called the Community Engagement Committee. The motion was seconded and discussed. Due to lack of physical quorum an email with details will f ollow with an electronic vote to follow.\n\nWe are awaiting specific guida nce from the College in regards to departmental spending. As it currently stands\, our department has been adhering to the appropriate allocation of funds in regards to travel\, research\, and event spending. \n\nUnit adju stments are not likely to occur. As for the merit pool\, that is still unc lear. This may affect our review process this year. \n\nWe have hired two Acting Assistant Professors this cycle.  \n\nADJOURNMENT\n\nThere being no new business\, the meeting passed into executive session at 4:08pm. DTSTART;TZID=America/Los_Angeles:20250311T153000 DTEND;TZID=America/Los_Angeles:20250311T163000 LAST-MODIFIED:20250414T203440Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-11/faculty-meeting END:VEVENT BEGIN:VEVENT UID:7e69680c-bd7b-4f5b-b1a0-08b9847ec394 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250303T052058Z DESCRIPTION:The final combinatorics seminar of the quarter will feature a s pecial session of graduate student lightning talks. Each speaker will give a 10-minute presentation.\n\nList of speakers:\n\nNatasha Crepeau\nLauren Nowak\nJoe Rogge\nCameron Wright\nMichael Zeng\n\n\nTitles and abstracts for individual talks will be updated later. The event will take place from 3:30 to 5:00 PM and is in-person only.\n\n \n\n\nTalk titles and abstract s:\n\n \n\nNatasha Crepeau: Constructing stability conditions from triangu lations of Lawrence polytopes\n\n \n\nAbstract: A stability condition of a graph \$G\$ is a collection of generalized break divisors of size \$|\mat hcal{ST}(G)|\$. In this talk\, we'll construct stability conditions of \$G \$ from triangulations of the Lawrence polytope of the matroid dual to the graphic matroid \$\mathcal{M}(G)\$\, and discuss why these stability cond itions are important in the study of compactified Jacobians.\n\n \n\nLaure n Nowak: Tropical oriented matroids & tropical (pseudo)hyperplane arrangem ents\n\n \n\nAbstract: Representability is a core aspect of studying matro ids. In this expository talk\, we will discuss what a tropical oriented ma troid is\, whether it can be realized as a tropical (pseudo)hyperplane arr angement\, and how these questions connect to mixed subdivisions of dilate d simplices.\n\n \n\nJoe Rogge: Geometry and Combinatorics of P-matrices\n \n \n\nAbstract: P-matrices are a broad class of 'positive' matrices\, gen eralizing well-known matrix classes such as positive definite matrices\, t otally positive matrices\, and M-matrices (which themselves generalize gra ph Laplacians). We compute the dimension of the space of P-matrices as a s emi-algebraic set\, get some insight into the topology of this space\, and describe the combinatorics of low order P-matrices.\n\n \n\nCameron Wrigh t: A Categorical Approach to Matroids\n\n \n\nAbstract: Following the work of Baker and Bowler\, several classes of matroids can be described as mat roids over (perfect) idylls \$F\$\, which are a special kind of tract. Suc h classes include matroids\, oriented matroids\, regular matroids\, and va luated matroids. Generalizing strong maps to \$F\$-matroids\, we obtain no tions of short exact sequences and rudimentary homological algebra. We des cribe this setup and some consequences\, considering in particular connect ions with quiver representations and tropical vector bundles. Based on Joi nt work with Jaiung Jun and Alex Sistko.\n\n \n\nMichael Zeng: K-Theory of Spanning Line Configurations\n\n \n\nAbstract: The space of spanning line configurations \$X_{n\,k}\$ is a generalization of the flag variety first introduced by Brendan Pawlowski and Brendon Rhoades. It provides geometri c foundations for the combinatorics of ordered set partitions aka. Fubini words. Moreover\, its cohomology ring \$R_{n\,k}\$ is a generalization of the classical coinvariant algebra. The \$K_0\$ ring of a variety is an enr ichment of the ordinary cohomology ring by recording how vector bundles as semble and decompose. In this talk\, we outline a computation of the \$K_0 \$ ring of \$X_{n\,k}\$ using Fulton and Lascoux's degeneracy loci formula in terms of double Grothendieck polynomials. We show that \$K_0(X_{n\,k}) \$ is again isomorphic to \$R_{n\,k}\$\, providing a new instance of an ex ceptional isomorphism between cohomology and \$K_0\$. DTSTART;TZID=America/Los_Angeles:20250312T153000 DTEND;TZID=America/Los_Angeles:20250312T170000 LAST-MODIFIED:20250310T202139Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Special episode Graduate Student Lightning Talks TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-12/special-episode-graduate- student-lightning-talks END:VEVENT BEGIN:VEVENT UID:52ab5ccb-ddb7-4977-9b6d-232a1548e964 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250311T180249Z DESCRIPTION:Speaker: Daniel Rostamloo\, UW\n\nA celebrated result of Bondal -Orlov shows that a smooth projective scheme \$X\$ with (anti-)ample canon ical bundle can be recovered from the triangulated structure of \$\operato rname{Perf} X\$. Recent work of Ito-Matsui gives a new proof of this theor em and introduces the Fourier-Mukai locus associated to \$X\$\, which is r oughly a gluing of its derived equivalences\, with a view toward providing a categorical approach to questions in birational geometry. I will explai n these constructions and\, time permitting\, discuss examples in the cont ext of abelian varieties. DTSTART;TZID=America/Los_Angeles:20250313T150000 DTEND;TZID=America/Los_Angeles:20250313T160000 LAST-MODIFIED:20250313T051327Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar A study of derived equivalences via Matsui spe ctra and the Fourier Mukai locus TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-13/student-ag-seminar-study- derived-equivalences-matsui-spectra-and-fourier-mukai END:VEVENT BEGIN:VEVENT UID:cc76e404-8f18-42d9-ade2-b94641f3ed69 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20250312T161653Z DTSTART;TZID=America/Los_Angeles:20250313T173000 DTEND;TZID=America/Los_Angeles:20250313T193000 LAST-MODIFIED:20260121T214440Z LOCATION:DEN 303 SUMMARY:: WXML open house TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-13/wxml-open-house END:VEVENT BEGIN:VEVENT UID:9981c04d-9984-43d8-bc0a-28e75b6c5962 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20250306T234233Z DESCRIPTION:Speaker: Math AI Lab\n\nCome see what the Math AI Lab (aka eXpe rimental Lean Lab) has been up to this quarter. Undergraduates will presen t their work on the following projects:\n\n\n What mathematical functions c an neural networks learn?\n Reinforcement Learning for polynomials\n Auto-fo rmalization with Language Models\n Metaprogramming in Lean\n Formalizing Pol yhedral Geometry in Lean\n Counterexamples in Commutative Algebra in Lean\n Formalizing Zariski Spaces in Lean DTSTART;TZID=America/Los_Angeles:20250314T143000 DTEND;TZID=America/Los_Angeles:20250314T160000 LAST-MODIFIED:20250306T234834Z LOCATION:CMU B-006 SUMMARY:: Math AI Lab Winter 2025 Projects TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-14/math-ai-lab-winter-2025-p rojects END:VEVENT BEGIN:VEVENT UID:afb0649e-b173-4bcf-bf24-3facbc805430 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250317T201643Z DESCRIPTION:Speaker: Joe Rogge\n\nAdvisor: Cynthia Vinzant DTSTART;TZID=America/Los_Angeles:20250318T103000 DTEND;TZID=America/Los_Angeles:20250318T113000 LAST-MODIFIED:20250317T201828Z LOCATION:THO 119 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-18/general-exam END:VEVENT BEGIN:VEVENT UID:af6dd5b9-aece-432e-9f4a-223bf104c32a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250313T000449Z DESCRIPTION:Speaker: Gal Yehuda\, Yale University\n\nAbstract: \n\nWhat is the size of the smallest neural network that computes the parity function? How many hyperplanes are needed to slice the Boolean hypercube? In this t alk we will discuss the connection between the problems as well as lower b ounds\, using methods from convex geometry\, probability and combinatorics .  DTSTART;TZID=America/Los_Angeles:20250318T143000 DTEND;TZID=America/Los_Angeles:20250318T153000 LAST-MODIFIED:20250313T000449Z LOCATION:PDL C-38 SUMMARY:: Lower bounds on neural networks and slicing the hypercube TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-03-18/lower-bounds-neural-netwo rks-and-slicing-hypercube END:VEVENT BEGIN:VEVENT UID:e724b206-43f0-474e-a787-3723d20b94bd DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210423Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n Committee Reports\n \n Undergraduate Program - Thomas\n \n \n New Business\n Executive Session\n Adjournment\n\n\nMINUTES\n\nThe regular meeting of the faculty of the Department of Mathematics was held in PDL C-38 at 3:30pm PS T\, April 1\, 2025. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.\n\nChair's Remarks\n\nLooking towards f iscal year 2026\, the department can viably fund up to 70 PhD students as the College is cutting our budget by 5%. We need to prepare the graduate s tudents for the decrease in available funding\, especially those continuin g past their fifth year.\n\nAnnouncements\n\nJarod Alper has started a Mat h AI lab.\n\nCorrine Yap will be giving a combinatorics seminar but also p resent her one-woman play Uniform Convergence. Details are on our website. \n\nThe department’s new IG account has been successfully advertising our various programs\, special topics classes\, and events. You can send them items for posting to instagram@math.washington.edu.\n\nTwo of our undergra duate majors received Honorable Mentions in the AMS poetry contest: Joseph Wang and Joeph Rafael. You can read their poems on our website.\n\nJenni Taggart created a Math Instructor Guide with lots of useful resources. Jen ni also serves as our Disability Resources for Students coordinator.\n\nUW -IT has created a UW Math group in Canvas Commons where we can share our c ourses with members of our own department. If you are interested in sharin g your Canvas course to the department or if you are interested in accessi ng shared materials\, first make sure that you’ve visited Canvas Commons a t least once. (From anywhere in Canvas\, you should see the 'Commons' icon in the main Canvas menu.) Once you’ve done that\, email Jenni Taggart for access.\n\nCommittee Reports\n\nThe Undergraduate Program Committee propo sed the following: \n\n\n Remove MATH 126 as a prerequisite for MATH 208\n R evise and update the BA Teacher Prep degree to align with requirements of similar institutions\n\n\nA motion was made to vote on both items via unan imous consent. The motion was seconded\, the vote held\, and passed.\n\nAl l of our 200-\, 300-\, and 400-level classes have gone up from 3 to 4 cred its.\n\nThere are new descriptions for almost all of our 400-level classes (MATH 491 is being fully revamped).\n\nUG course assistants are now being assigned to 200-level classes. Please encourage your strongest students t o apply. Questions can be fielded by Zhixu Su.\n\nADJOURNMENT\n\nThere bei ng no new business\, the meeting passed into executive session at 4:27pm. DTSTART;TZID=America/Los_Angeles:20250401T153000 DTEND;TZID=America/Los_Angeles:20250401T163000 LAST-MODIFIED:20250515T204436Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-01/faculty-meeting END:VEVENT BEGIN:VEVENT UID:551f4e0d-f362-49a6-bb77-dbbdf33b6a3c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T200926Z DESCRIPTION:Speaker: Sarafina Ford\, University of Washington\n\nAbstract: \n\nLocally gentle algebras are a class of infinite-dimensional\, non-conn ected algebras which have nice combinatorial interpretation in terms of qu ivers with relations. These relations ensure that each arrow is contained in a unique maximal path. In this talk\, I will discuss joint work with Ja mes Zhang and Amrei Oswald describing how these maximal paths determine th e spectrum\, growth\, and homological properties of locally gentle algebra s.\n\nNote: This talk begins with a pre-seminar (aimed at graduate student s) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https ://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250402T153000 DTEND;TZID=America/Los_Angeles:20250402T170000 LAST-MODIFIED:20250331T064627Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Combinatorics of locally gentle algebras TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-02/combinatorics-locally-gen tle-algebras END:VEVENT BEGIN:VEVENT UID:88fcdf7a-1d19-4e8f-ad00-baf220f9cfce DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20241001T145505Z DESCRIPTION:Speaker: Ao Sun (Lehigh)\n\nA central question in geometric flo w is to understand how the geometry and topology change after passing thro ugh singularities. I will explain how the local dynamics influence the sha pe of the flow near a singularity\, and how the geometry and topology of t he flow will change after passing through a singularity with generic dynam ics. This talk is based on joint work with Zhihan Wang and Jinxin Xue. DTSTART;TZID=America/Los_Angeles:20250402T160000 DTEND;TZID=America/Los_Angeles:20250402T170000 LAST-MODIFIED:20250319T172321Z LOCATION:PDL C-038 SUMMARY:: Local dynamics and shape of mean curvature flow passing through a singularity TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-02/local-dynamics-and-shape- mean-curvature-flow-passing-through-singularity END:VEVENT BEGIN:VEVENT UID:31c40366-8a07-4192-9045-e4a28d21cd96 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250304T015329Z DESCRIPTION:Speaker: Lihan Wang\, Cal State Long Beach\n\nSteklov eigenvalu es\, introduced by Steklov in 1902\, are a type of\neigenvalue arising in boundary value problems. In geometric analysis\,\nthere is a deep connecti on between extremal Steklov eigenvalue\nproblems and free boundary minimal surface theory. Steklov eigenvalues\ncan be viewed as eigenvalues of the Dirichlet-to-Neumann operator\,\nwhich plays a central role in inverse pro blems. They arise in fluid\ndynamics\, influencing the behavior of liquids in containers and\ninforming the design of engineering structures. In the talk\, we will\ndiscuss the question how rare simple Steklov eigenvalues are on\nmanifolds and its applications in nodal sets and critical points o f\neigenfunctions. DTSTART;TZID=America/Los_Angeles:20250402T170000 DTEND;TZID=America/Los_Angeles:20250402T180000 LAST-MODIFIED:20250307T051113Z LOCATION:PDL C-038 SUMMARY:: How rare are simple Steklov eigenvalues joint w IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-02/how-rare-are-simple-stekl ov-eigenvalues-joint-w-ip-seminar END:VEVENT BEGIN:VEVENT UID:0451253e-ec7e-4e04-b4d3-45be1398cfe8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250401T221559Z DESCRIPTION:Speaker: Andrew Tawfeek\, UW\n\nWe will open with a discussion of the Brill-Noether Theorem\, a statement concerning the topology of the Brill-Noether locus: the collection line bundles of degree \$d\$ and rank \$r\$ over a variety \$X\$. We then shift to discussing its conjectural tr opical formulation and a recent attempt to attack the problem by mimicking the classical proof: developing a tropical Porteous formula and applying it to an analogue of the Poincaré bundle. This talk is largely based on th e work of arXiv 2411.10578. DTSTART;TZID=America/Los_Angeles:20250403T150000 DTEND;TZID=America/Los_Angeles:20250403T160000 LAST-MODIFIED:20250401T221609Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp The quest towards a tropical Brill Noethe r Theorem TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-03/student-ag-seminar-nbsp-q uest-towards-tropical-brill-noether-theorem END:VEVENT BEGIN:VEVENT UID:e8262312-78f0-478a-965f-1c75074a1844 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250401T204905Z DESCRIPTION:Speaker: Michael R. Zeng\, University of Washington\n\nThe flag variety is a well-studied object in combinatorial algebraic geometry. It is a celebrated theorem by Borel that the cohomology ring of the flag vari ety is isomorphic to the coinvariant algebra. Pawlowski and Rhoades (2017) constructed the space of spanning line configurations X_{n\,k}\, a quasip rojective variety whose cohomology ring is isomorphic to a generalized coi nvariant algebra R_{n\,k}. The space X_{n\,k} provides a geometric foundat ion for the combinatorics of Fubini words.\n\nThe Grothendieck group K_0 c lassifies vector bundles over an algebraic variety and has close connectio ns to cohomology. In this talk\, we show that the Grothendieck group K_0(X _{n\,k}) is isomorphic to the generalized coinvariant algebra R_{n\,k}. Al ong the way\, we discuss Schubert and Grothendieck polynomials\, Fubini wo rds\, and the relevant combinatorics. DTSTART;TZID=America/Los_Angeles:20250403T163000 DTEND;TZID=America/Los_Angeles:20250403T173000 LAST-MODIFIED:20250402T210024Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar Flags spanning lines and Grothendieck s henanigans TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-03/writing-milestone-seminar -flags-spanning-lines-and-grothendieck-shenanigans END:VEVENT BEGIN:VEVENT UID:d2351978-59ba-49bc-8d1b-595fb3334c11 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T233400Z DESCRIPTION:Speaker: Jack Kendrick\, University of Washington\n\nSymmetry a rises often when learning from high dimensional data. For example\, data s ets consisting of point clouds\, graphs\, and unordered sets appear routin ely in contemporary applications and exhibit rich underlying symmetries. M oreover\, many functions which we hope to learn from these data sets are w ell-defined regardless of the ambient dimension of the data. In this talk\ , we will explore how the phenomenon of representation stability can be ex ploited to learn invariant functions that generalize well as we vary the u nderlying dimension of data. In particular\, we will discuss three example s of machine learning models: equivariant neural networks\, invariant poly nomial regression\, and invariant kernels.\n\nZoom Link: https://washingto n.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250404T143000 DTEND;TZID=America/Los_Angeles:20250404T152000 LAST-MODIFIED:20250330T233359Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Representation Stability for Machine Learning TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-04/1-2-3-seminar-representat ion-stability-machine-learning END:VEVENT BEGIN:VEVENT UID:d457a280-1e5b-428e-9538-87b44e67e318 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250307T183223Z DESCRIPTION:Speaker: Sharon Arroyo and Joerg Gablonsky\, The Boeing Company \n\nSharon and Joerg are members of the Boeing Applied Mathematics organiz ation. They partner with business units to develop applied math solutions and tools that help Boeing reduce costs\, improve products and operations. In this presentation\, Sharon and Joerg will give an overview of some of the projects on which they have worked and will give insights into what it is like to work as a mathematician in industry.There will be an informal discussion following the talk. Sharon Arroyo is a Senior Technical Fellow in the Boeing Applied Mathematics Group. She partners with collaborators t o develop operations research and optimization tools that help Boeing redu ce costs and improve products and operations. She also leads the strategy\ , acquisition\, development and transition of applied mathematics and oper ations research technology that is used company-wide. She has developed op erations research and optimization solutions for applications across Boein g including supply chain\, airline scheduling\, wind tunnel testing\, airc raft delivery\, robot scheduling\, logistics\, communication networks\, an d sensor fusion and scheduling.  Prior to joining Boeing\, she was an Assi stant Professor at Iowa State University. She received her B.S. in Mathema tics from Stanford University and her M.S. and Ph.D. in Operations Researc h from Cornell University.  Sharon is a Fellow of the Society for Industri al and Applied Mathematics (SIAM).Joerg Gablonsky is a Boeing Technical Fe llow\, technical lead for the numerical optimization group in the Boeing R esearch & Technology (BR&T) Applied Mathematics group\, and the Chair of t he Enterprise HPC Council. As the Chair of the Enterprise HPC Council he b rings together all stakeholders in the Enterprise HPC Service to provide s trategic guidance to the Service (EHPCS)\, support the setting of appropri ate budgets\, and guide the exploration and adoption of future technologie s. In this role he also interfaces with HPC service providers like AWS and government organizations like the Department of Energy and NASA. As the N umerical Optimization technical lead Joerg leads and develops a world clas s team of applied optimization specialists\, and supports Boeing teams in applying the best design space exploration methods to their problems.  He received his Diplom in Mathematics and Business Administration from the Un iversity of Trier in Germany and his Ph.D. in Applied Mathematics from Nor th Carolina State University. DTSTART;TZID=America/Los_Angeles:20250404T153000 DTEND;TZID=America/Los_Angeles:20250404T163000 LAST-MODIFIED:20260121T211934Z LOCATION:ECE 125 SUMMARY:: Flying High with Math TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-04/flying-high-math END:VEVENT BEGIN:VEVENT UID:13c9a8fe-f967-454e-b723-e23b9d7c8264 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250401T030014Z DESCRIPTION:Speaker: Benjamin Capdeville\, Université Paris Saclay\n\nSince a seminal paper by Jordan\, Otto\, and Kinderlehrer (98')\, it is now wel l known that some evolution PDEs\, such as diffusion and advection PDEs\, can be interpreted as gradient flows with respect to the Wasserstein dista nce. Since then\, there have been ongoing efforts to integrate various evo lutionary processes into this framework. In this talk\, I will introduce t he Moran process and the Kimura equation. I will go through the main ideas of Wasserstein gradient flow theory and explain how it is related to the Moran process and the Kimura equation. Indeed\, the key point here is to l ook at a conditioned version of the dynamics\, called the Q-process. The r esulting dynamics can then be seen as a Wasserstein gradient flow\, with d egenerate underlying geometry\, involving the Shahshahani metric. Finally\ , we will see that the dissipation induced by the hidden gradient flow in the continuous setting is a good approximation of the dissipation in the d iscrete setting in its high population limit. DTSTART;TZID=America/Los_Angeles:20250407T143000 DTEND;TZID=America/Los_Angeles:20250407T153000 LAST-MODIFIED:20250401T030014Z LOCATION:SMI 102 SUMMARY:: Hidden gradient flow structures for the Moran process and the Kim ura equation TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-07/hidden-gradient-flow-stru ctures-moran-process-and-kimura-equation END:VEVENT BEGIN:VEVENT UID:716d5de0-785f-48b1-ad76-87a581d1cab7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250404T162218Z DESCRIPTION:Speaker: Nathan (Nati) Srebro\, Toyota Technological Institute at Chicago and University of Chicago\n\nWeak-to-Strong Generalization (Bu rns et al.\, 2023) is the phenomenon whereby a strong student\, say GPT-4\ , learns a task from a weak teacher\, say GPT-2\, and ends up significantl y outperforming the teacher. We show that this phenomenon does not require a strong and complex learner like GPT-4\, nor pre-training. We consider s tudents and teachers that are random feature models\, described by two-lay er networks with a random and fixed bottom layer and trained top layer. A ‘weak’ teacher\, with a small number of units (i.e. random features)\, is trained on the population\, and a ‘strong’ student\, with a much larger nu mber of units (i.e. random features)\, is trained only on labels generated by the weak teacher. We demonstrate\, prove and understand\, how the stud ent can outperform the teacher\, even though trained only on data labeled by the teacher\, with no pretraining or other knowledge or data advantage over the teacher. We explain how such weak-to-strong generalization is ena bled by early stopping. Importantly\, we also show the quantitative limits of weak-to-strong generalization in this model.\n\nJoint work with Marko Medvedev\, Kaifeng Lyu\, Dingli Yu\, Sanjeev Arora and Zhiyuan Li. DTSTART;TZID=America/Los_Angeles:20250407T153000 DTEND;TZID=America/Los_Angeles:20250407T163000 LAST-MODIFIED:20250404T162218Z LOCATION:CSE1 691 - Gates Commons SUMMARY:: Weak to Strong Generalization in Random Feature Models nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-07/weak-strong-generalizatio n-random-feature-models-nbsp END:VEVENT BEGIN:VEVENT UID:7f07c3b3-305b-4ea9-b385-7bea49d048dd DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250401T152532Z DESCRIPTION:Speaker: Nathan Cheung\n\nAdvisor: Gaku Liu DTSTART;TZID=America/Los_Angeles:20250408T120000 DTEND;TZID=America/Los_Angeles:20250408T130000 LAST-MODIFIED:20250401T152630Z LOCATION:THO 211 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-08/general-exam END:VEVENT BEGIN:VEVENT UID:5d87ddae-8add-4b26-8c7d-f0e2f77707af DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250404T144410Z DESCRIPTION:Speaker: José Yáñez (UCLA)\n\n\n\n\n\n\n\n\nTitle: Polarized en domorphisms and log Calabi-Yau pairs\n\nAbstract: In this pre-talk\, I wil l give details in some definition and examples related to polarized endomo rphisms and Calabi-Yau pairs.\n\n\n \n\n \n\n\n\n\nTitle: Polarized endomo rphisms of log Calabi-Yau pairs\n\nAbstract: An endomorphism on a normal p rojective variety X is said to be polarized if the pullback of an ample di visor A is linearly equivalent to qA\, for some integer q>1. Examples of t hese endomorphisms are naturally found in toric varieties and abelian vari eties. Indeed\, it is conjectured that if X admits a polarized endomorphis m\, then X is a finite quotient of a toric fibration over an abelian varie ty. In this talk\, we will restrict to the case of log Calabi-Yau pairs (X \,B). We prove that if (X\,B) admits a polarized endomorphism that preserv es the boundary structure\, then (X\,B) is a finite quotient of a toric lo g Calabi-Yau fibration over an abelian variety. This is joint work with Jo aquin Moraga and Wern Yeong.\n\n \n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250408T134500 DTEND;TZID=America/Los_Angeles:20250408T154500 LAST-MODIFIED:20250404T144434Z LOCATION:PDL C-38 SUMMARY:: Polarized endomorphisms of log Calabi Yau pairs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-08/polarized-endomorphisms-l og-calabi-yau-pairs END:VEVENT BEGIN:VEVENT UID:9ee7ab41-9eeb-4f64-a42d-8fd8e7930713 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201035Z DESCRIPTION:Speaker: Lucas Gagnon\, York University\n\nAbstract:\n\nSchuber t polynomials concretely embody the remarkable connection between the geom etry of the flag variety \$GL(n)/B\$ and the combinatorics of the symmetri c group. This talk will develop similar story for the forest polynomials r ecently introduced by Tewari–Nadeau by constructing a subvariety of \$GL(n )/B\$ that I will call the 'quasisymmetric flag variety' using an adaptati on of the BGG construction of Schubert varieties. By studying the torus-eq uivariant cohomology of this space\, one finds results that rhyme with the greatest hits of Schubert calculus\, including a realization of its cohom ology ring as the coninvariants of quasisymmetric polynomials. We end with a few connections back to ordinary Schubert calculus. This work is based on joint research with Nantel Bergeron\, Philippe Nadeau\, Hunter Spink\, and Vasu Tewari.\n\nNote: This talk begins with a pre-seminar (aimed at gr aduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 59 74 DTSTART;TZID=America/Los_Angeles:20250409T153000 DTEND;TZID=America/Los_Angeles:20250409T170000 LAST-MODIFIED:20250331T064932Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Double forest polynomials and the quasisymmetric flag variety TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-09/double-forest-polynomials -and-quasisymmetric-flag-variety END:VEVENT BEGIN:VEVENT UID:b1047931-6bda-4e8b-b882-48ecf06f9d7d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250304T015116Z DESCRIPTION:Speaker: W. Jacob Ogden (UW)\n\nWe derive constant rank theorem s for saddle solutions to special Lagrangian equations and the quadratic H essian equation. The constant rank theorem asserts that\, for solutions of the equations which verify a certain convexity condition\, a strong minim um principle holds for the minimum eigenvalue of the Hessian. We discuss c onnections between this result and the rigidity and regularity of solution s\, and also mention a conceptually simple approach to proving a general c onstant rank theorem for fully nonlinear inverse-convex elliptic equations . This is joint work with Yu Yuan. DTSTART;TZID=America/Los_Angeles:20250409T160000 DTEND;TZID=America/Los_Angeles:20250409T170000 LAST-MODIFIED:20250408T001644Z LOCATION:PDL C-038 SUMMARY:: A constant rank theorem for special Lagrangian equations TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-09/constant-rank-theorem-spe cial-lagrangian-equations END:VEVENT BEGIN:VEVENT UID:33854da3-d488-4489-8be7-5dfb97c00c23 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250408T002056Z DESCRIPTION:Speaker: Jesse Railo\, LUT\, Finland\n\nWe consider the followi ng inverse problem: Suppose \n\na (1 +1)-dimensional wave equation on R+ w ith zero initial conditions is\nexcited with a Neumann boundary data model led as a white noise\nprocess. Given also the Dirichlet data at the same p oint\, determine\nthe unknown first order coefficient function of the syst em. The\ninverse problem is then solved by showing that correlations of th e\nboundary data determine the Neumann-to-Dirichlet operator in the sense \nof distributions\, which is known to uniquely identify the coefficient. \nThe model has potential applications in acoustic measurements of\nintern al cross-sections of fluid pipes such as pressurised water\nsupply pipes a nd vocal tract shape determination. This talk is based\non a joint-work wi th Emilia Blåsten\, Antti Kujanpää and Tapio Helin\n(LUT)\, and Lauri Oksa nen (Helsinki). DTSTART;TZID=America/Los_Angeles:20250409T170000 DTEND;TZID=America/Los_Angeles:20250409T180000 LAST-MODIFIED:20250408T003652Z LOCATION:PDL C-038 SUMMARY:: Recovering a first order perturbation of one dimensional wave equ ation from white noise boundary data nbsp joint w IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-09/recovering-first-order-pe rturbation-one-dimensional-wave-equation-white-noise END:VEVENT BEGIN:VEVENT UID:e6d69c7e-dbce-4c88-b3ce-dd3713ee8b70 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250408T015627Z DESCRIPTION:Speaker: Benjamin Capdeville\, Université Paris Saclay\n\nSince a seminal paper by Jordan\, Otto\, and Kinderlehrer (98')\, it is now wel l known that some evolution PDEs\, such as diffusion and advection PDEs\, can be interpreted as gradient flows with respect to the Wasserstein dista nce. Since then\, there have been ongoing efforts to integrate various evo lutionary processes into this framework. In this talk\, I will introduce t he Moran process and the Kimura equation. I will go through the main ideas of Wasserstein gradient flow theory and explain how it is related to the Moran process and the Kimura equation. Indeed\, the key point here is to l ook at a conditioned version of the dynamics\, called the Q-process. The r esulting dynamics can then be seen as a Wasserstein gradient flow\, with d egenerate underlying geometry\, involving the Shahshahani metric. Finally\ , we will see that the dissipation induced by the hidden gradient flow in the continuous setting is a good approximation of the dissipation in the d iscrete setting in its high population limit. DTSTART;TZID=America/Los_Angeles:20250410T123000 DTEND;TZID=America/Los_Angeles:20250410T133000 LAST-MODIFIED:20250408T015627Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Hidden gradient flow structures for the Moran process a nd the Kimura equation TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-10/gsas-nbsp-hidden-gradient -flow-structures-moran-process-and-kimura-equation END:VEVENT BEGIN:VEVENT UID:c75dba29-e1e7-4bc3-9190-a7200867d632 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250408T004743Z DESCRIPTION:Speaker: Tyson Klingner\, University of Washington\n\nGiven a c ompact complex M manifold there is in general no natural choice metric. A natural question is to ask what is the ``best'' metric we can endow on M. In the 50's\, the differential geometer Eugenio Calabi studied this questi on and through considering various curvature notions made a conjecture on the existence of a special class of metrics called Kähler-Einstein metrics . In 1978\, Yau definitively proved the conjecture using geometric analysi s. This talk will be expository and cover this beautiful topic. DTSTART;TZID=America/Los_Angeles:20250410T163000 DTEND;TZID=America/Los_Angeles:20250410T173000 LAST-MODIFIED:20250414T210743Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar Yau s proof of the Calabi Conjecture TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-10/writing-milestone-seminar -yau-s-proof-calabi-conjecture END:VEVENT BEGIN:VEVENT UID:d4621882-0133-4d11-9a3d-bde96b6b94cb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250407T204633Z DESCRIPTION:Speaker: Charlie Magland\, University of Washington\n\n\n\nWhen studying representations of a group or group scheme\, we can find new rep resentations by 'adding' (taking a direct sum) or 'multiplying' (taking a tensor product) two representations. In this way\, we have a structure on the category of representations similar to a ring. With some additional co nditions to make this nice\, we call such a category a (symmetric) tensor category. In this talk we will look at examples of other tensor categories and see how representation theory leads to a conjectured classification o f all symmetric tensor categories of moderate growth.\n\nZoom Link: https: //washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250411T143000 DTEND;TZID=America/Los_Angeles:20250411T152000 LAST-MODIFIED:20250407T204633Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Representation Theory and Tensor Categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-11/1-2-3-seminar-representat ion-theory-and-tensor-categories END:VEVENT BEGIN:VEVENT UID:c7a351c3-09cb-4fa1-a631-8e107afdee7b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250409T171917Z DESCRIPTION:Speaker: Jarod Alper\, UW\n\nWe will revisit Drezet and Narasim han's computation from the 80s.  DTSTART;TZID=America/Los_Angeles:20250411T153000 DTEND;TZID=America/Los_Angeles:20250411T163000 LAST-MODIFIED:20250409T171929Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp The Picard group of the moduli of vector bundles on a curve TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-11/student-ag-seminar-nbsp-p icard-group-moduli-vector-bundles-curve END:VEVENT BEGIN:VEVENT UID:4ec84c26-d723-4974-bdea-a359931a2d77 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250401T191828Z DESCRIPTION:Speaker: Sayan Banerjee\, University of North Carolina\, Chapel Hill\n\nMean-field systems are interacting particle systems where particl es interact with each other only through the empirical measure encoding th eir locations. Typical results involve obtaining a McKean-Vlasov equation for the fluid limit that provides a good approximation for the particle sy stem over compact time intervals. However\, when the driving vector field governing the particle dynamics lacks a gradient structure or in the absen ce of convexity or functional inequalities\, the long-time behavior of suc h systems is far from clear. In this talk\, I will discuss two such system s\, one arising in the context of flocking and the other\nin the context o f sampling (Stein Variational Gradient Descent)\, where there is no unifor m-in-time control on the discrepancy between the fluid limit and prelimit dynamics. We will explore methods involving Lyapunov functions and weak co nvergence which shed light on their long-time behavior in the absence of s uch uniform control.\n\nBased on joint works with Amarjit Budhiraja\, Dils had Imon (UNC\, Chapel Hill)\, Krishnakumar Balasubramanian (UC Davis) and Promit Ghosal (UChicago). DTSTART;TZID=America/Los_Angeles:20250414T143000 DTEND;TZID=America/Los_Angeles:20250414T153000 LAST-MODIFIED:20250401T191828Z LOCATION:SMI 102 SUMMARY:: Non linear mean field systems in flocking and sampling TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-14/non-linear-mean-field-sys tems-flocking-and-sampling END:VEVENT BEGIN:VEVENT UID:86501417-96c0-462b-9440-2f7a907a33d6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240925T211517Z DESCRIPTION:Speaker: Tselil Schramm\, Stanford\n\nFor many optimization pro blems\, we lack time-efficient algorithms\; in many cases this is true eve n for 'average-case' inputs from simple data models. To what extent can to ols for complexity theory be adapted to this average-case setting? In this talk\, I will focus on a very basic tool from complexity: replacing a sea rch/optimization problem with a yes/no decision problem. I will survey som e settings in which this approach has been successful via the study of 'pl anted' average-case inputs. Then\, I will describe some problems for which I do not know of a natural average-case decision problem\, with (perhaps unfortunate) ties to Ramsey theory.\n\nTselil Schramm is an assistant prof essor of Statistics at Stanford University. Before joining Stanford\, she received her PhD from U.C. Berkeley and was also a postdoc at Harvard and MIT. She is broadly interested in the theory of algorithms\, optimization\ , and computational complexity\, especially for problems arising in statis tics. Her work aims to develop algorithmic tools for high-dimensional esti mation problems and to characterize and explain information-computation tr adeoffs. DTSTART;TZID=America/Los_Angeles:20250414T153000 DTEND;TZID=America/Los_Angeles:20250414T163000 LAST-MODIFIED:20250318T194032Z LOCATION:Gates Commons CSE1 691 SUMMARY:: Average case optimization search vs decision TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-14/average-case-optimization -search-vs-decision END:VEVENT BEGIN:VEVENT UID:302ce832-46f3-4139-91eb-7b77a4bfea69 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201135Z DESCRIPTION:Speaker: Jasper Moxuan Liu\, University of California San Diego \n\nAbstract:\n\nLet \$\operatorname{Mat}_{n \times n}(\mathbb C)\$ be the affine space of \$n \times n\$ complex matrices with coordinate ring \$\m athbb C[\mathbf{x}_{n\times n}]\$. We define graded quotients of \$\mathbb C[\mathbf{x}_{n\times n}]\$ where each quotient ring carries a group acti on. These quotient rings are obtained by applying the orbit harmonics meth od to matrix loci corresponding to the permutation matrix group \$\mathfra k S_n\$\, the colored permutation matrix group \$\mathfrak S_{n\,r}\$\, th e collection of all involutions in \$\mathfrak S_n\$\, and the conjugacy c lass of fixed point free involutions in \$\mathfrak S_n\$. In each case\, we explore how the algebraic properties of these quotient rings are govern ed by the combinatorial properties of the matrix loci. Based on joint work with Yichen Ma\, Brendon Rhoades\, and Hai Zhu.\n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main ta lk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/9154 7335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250416T153000 DTEND;TZID=America/Los_Angeles:20250416T170000 LAST-MODIFIED:20250331T065426Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Matrix loci orbit harmonics and shadow play TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-16/matrix-loci-orbit-harmoni cs-and-shadow-play END:VEVENT BEGIN:VEVENT UID:0b516c1e-92f1-4d4c-b883-677e0cdf4c56 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250315T191216Z DESCRIPTION:Speaker: Eric Klavins\, Proffessor at ECE\, UW\n\nI will descri be our recent efforts to formalize\, in Lean\, fundamental concepts from e ngineering mathematics including signal processing\, control theory\, and formal verification. I'll start with an overview of the relationship betwe en programming languages and formal logic\, which provides an astounding a venue for programmers and engineers to learn and hopefully contribute to m athematics. I will give several examples of projects engineering students have explored. I will then discuss various challenges\, mainly to do with rigorous software engineering\, that must be overcome before this kind of framework can be widely adopted in engineering.  DTSTART;TZID=America/Los_Angeles:20250417T150000 DTEND;TZID=America/Los_Angeles:20250417T160000 LAST-MODIFIED:20250315T191216Z LOCATION:PDL C-38 SUMMARY:: Formalizing Engineering Mathematics with Lean TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-17/formalizing-engineering-m athematics-lean END:VEVENT BEGIN:VEVENT UID:6c06ba6b-b790-4f30-ac7b-c2f28ca91264 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250415T020625Z DESCRIPTION:Speaker: Soham Ghosh\, UW\n\n \n\nAround 2001\, motivated by hi s work on singularities\, Casas-Alvero conjectured the following: If a mon ic univariate polynomial \$f(X)\$ of degree \$n\$\, over a field of charac teristic \$0\$\, has a non-trivial gcd with each of its formal derivatives \$f^{(i)}(X)\$ for \$1\leq i\leq n-1\$\, then \$f(X)\$ is a pure power of a monic linear polynomial. In this talk\, we will show that over any fiel d of characteristic \$p>0\$\, there are 'finitely many' counter-examples t o the conjecture\, and also sketch a proof of the conjecture over characte ristic \$0\$. As a corollary\, we will also obtain a new proof of the fact that rational normal curves are set-theoretic complete intersections (in characteristic \$0\$). Based on the preprints arxiv: 2402.18717 and arxiv: 2501.09272.\n\n  DTSTART;TZID=America/Los_Angeles:20250417T150000 DTEND;TZID=America/Los_Angeles:20250417T160000 LAST-MODIFIED:20250415T020717Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp On the Casas Alvero conjecture TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-17/student-ag-seminar-nbsp-c asas-alvero-conjecture END:VEVENT BEGIN:VEVENT UID:30324411-043f-4f4d-aa3c-8d325e59e30d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250414T165328Z DESCRIPTION:Speaker: Wolfgang Allred\, University of Washington\n\nBy ferti lizing the poor arid desert of triangulated categories with a monoidal str ucture we can grow a virile forest of tensor triangulated categories. But beware: it is a haunted forest full of spectres. Will we brave the dark to claim the rumored treasure of cohomological support varieties? Or will we turn tail and run home?  Tune in this week to find out. DTSTART;TZID=America/Los_Angeles:20250417T163000 DTEND;TZID=America/Los_Angeles:20250417T173000 LAST-MODIFIED:20250414T210818Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar Support Theory through Tensor Triangula ted Geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-17/writing-milestone-seminar -support-theory-through-tensor-triangulated-geometry END:VEVENT BEGIN:VEVENT UID:c4d50cf7-62dc-440b-94f9-f0227ba910a9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250414T034730Z DESCRIPTION:Speaker: Ethan MacBrough\, University of Washington\n\n\n\nAn a lgebraic surface is a smooth projective variety of dimension 2 (in this ta lk\, over C). An extensive study of these objects by the classical Italian school culminated in the 1910s with Enriques' coarse classification into 8 types\, but many basic questions about surfaces (especially the surfaces of 'general' type) remain unsolved. In this talk I will explain the Enriq ues classification and present a few explicit examples of surfaces with be autiful hidden geometry.\n\nZoom Link: https://washington.zoom.us/j/928495 68892 DTSTART;TZID=America/Los_Angeles:20250418T143000 DTEND;TZID=America/Los_Angeles:20250418T152000 LAST-MODIFIED:20250414T034730Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Algebraic surfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-18/1-2-3-seminar-algebraic-s urfaces END:VEVENT BEGIN:VEVENT UID:72c651e4-8fd8-4371-87bc-ed71e399bf0c DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20240904T212145Z DESCRIPTION:Speaker: Agnès Beaudry\, University of Colorado Boulder\n\nHomo logy and cohomology are powerful invariants: while easy to compute\, they contain rich information about spaces\, the geometry of manifolds\, vector bundles\, and more. (Co)homology satisfies a list of axioms which are eas y to generalize. The best-known generalization is K-theory\, but there are many more. In this talk\, my goal is to give an introduction to some gene ralized (co)homology theories that play a central role in modern-day stabl e homotopy theory and to discuss some of the fascinating phenomena they ex hibit. DTSTART;TZID=America/Los_Angeles:20250418T153000 DTEND;TZID=America/Los_Angeles:20250418T163000 LAST-MODIFIED:20250414T160046Z LOCATION:ECE 125 SUMMARY:: Chromatic co homology theories TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-18/chromatic-co-homology-the ories END:VEVENT BEGIN:VEVENT UID:962795c9-a102-4a56-8868-1291004d9e0e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250415T034122Z DESCRIPTION:Speaker: Xiaowen Zhou\, Concordia University\, Canada\n\nΛ-Flem ing-Viot process is a probability-measure-valued process that is dual to a Λ-coalescent involving\nmultiple collisions. It is well known that such a process can have the compact support property\, i.e. its support\nbecomes finite at any positive time even though the initial measure has an unboun ded support.\n       For Λ-Fleming-Viot processes with Brownian spatial mo tion and with the associated Λ-coalescents coming down from infinity\, app lying the lookdown representation we obtain asymptotic results characteriz ing how fast the initial supports become finite. Our results are expressed using asymptotics of tail distributions of the initial measures and speed functions of coming down from infinity for the associated Λ-coalescents. We will also mention briefly the parallel results for super-Brownian motio ns.\n        This talk is based on joint work with Zenghu Li and Huili Liu . DTSTART;TZID=America/Los_Angeles:20250421T143000 DTEND;TZID=America/Los_Angeles:20250421T153000 LAST-MODIFIED:20250415T035242Z LOCATION:SMI 102 SUMMARY:: Speed of coming down from infinity for Fleming Viot initial suppo rt TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-21/speed-coming-down-infinit y-fleming-viot-initial-support END:VEVENT BEGIN:VEVENT UID:bf562f8d-b2a6-42a3-82a6-2b4f14b5ab36 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250416T214411Z DESCRIPTION:Speaker: Alex Betts\, Cornell University\n\nWhen you want to so lve a Diophantine equation in practice\, one of the most powerful modern t echniques is the Chabauty—Kim method\, which proceeds by constructing p-ad ic functions vanishing on the rational solutions of your equation. In this talk\, I will discuss a heuristic which predicts when these functions cut out exactly the set of rational points. As we will see\, the naive versio n of the heuristic is not quite correct\, since there can occasionally be extra 'unexpected' algebraic irrational points where the functions vanish (in accordance with a conjecture of Stoll). I will outline what is known a bout these unexpected points\, including some ongoing work with Jennifer B alakrishnan. DTSTART;TZID=America/Los_Angeles:20250422T110000 DTEND;TZID=America/Los_Angeles:20250422T115000 LAST-MODIFIED:20250416T214411Z LOCATION:PDL C-401 SUMMARY:: Quadratic Chabauty and a conjecture of Stoll TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-22/quadratic-chabauty-and-co njecture-stoll END:VEVENT BEGIN:VEVENT UID:00c81f61-6a1c-4ea3-98e8-c064dcdb286c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201237Z DESCRIPTION:Speaker: Dmitry Ryabogin\, Kent State University\n\nAbstract:\n \nLet \$K\$ be a convex body made of material of uniform density less than 1 submerged into water of density 1. How to find the directions of equili brium of \$K\$? How many directions of equilibrium does a triangular prism have? (A direction \$n\$ orthogonal to the water surface is called the di rection of equilibrium if the line passing through the center of mass of \ $K\$ and the center of mass of the underwater part is parallel to \$n\$). \n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https:/ /washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250423T153000 DTEND;TZID=America/Los_Angeles:20250423T170000 LAST-MODIFIED:20250423T191744Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: On equilibrium positions of convex bodies TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-23/equilibrium-positions-con vex-bodies END:VEVENT BEGIN:VEVENT UID:daef25a9-971c-4f01-a82e-36b6582aa418 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250201T040130Z DESCRIPTION:Speaker: Ilias Ftouhi\, Friedrich-Alexander Universität\n\nA f undamental question that frequently arises in mathematics is to\nunderstan d inequalities between different quantities and\, ideally\,\nidentifying t he sharpest ones. Blaschke--Santal\'o diagrams provide an\nelegant and eff ective way to visualize the best possible inequalities\nrelating various q uantities.\n\nAs an example\, in this talk\, we focus on the spectrum of t he Laplace\noperator with Dirichlet boundary conditions on \$\partial \Ome ga\$\, where\n\$\Omega \subset \mathbb{R}^d\$\, specifically its first eig envalue\, also\nknown as the fundamental frequency \$\lambda_1(\Omega)\$. Unfortunately\,\nan explicit formula for \$\lambda_1(\Omega)\$ is generall y unavailable.\nThis motivates the search for estimates using other functi onals that are\neasier to manipulate\, such as the perimeter \$P(\Omega)\$ and the volume\n\$|\Omega|\$.\n\nTo better understand the inequalities li nking the first eigenvalue\, the\nperimeter and the volume\, we introduce the Blaschke--Santal\'o diagram\nof the triplet \$(P\, \lambda_1\, |\cdot| )\$\, defined as follows:\n$$\nC_{F_{ad}} := \{(P(\Omega)\, \lambda_1(\Ome ga))\ |\ \Omega \in F_{ad}\,\\n\text{and}\ |\Omega|=1\}\,\n$$\nwhere \$F_{ ad}\$ is a given class of subsets of \$\mathbb{R}^d\$. It is\nimportant to note that characterizing this diagram is equivalent to\nidentifying all p ossible inequalities involving the considered\nquantities.\n\nWe fully des cribe the diagram for open sets\, demonstrating that no\ninequalities exis t beyond the classical Faber--Krahn and the\nisoperimetric inequalities. T his motivates the exploration of other\nclasses of sets\, such as convex o nes\, for which we provide an advanced\ndescription of the corresponding d iagram. Finally\, we discuss the use of\nnumerical tools and shape optimiz ation methods to obtain an optimal\ncharacterization of such diagrams\, il lustrating our results with various\nexamples. This talk is based on joint works with Jimmy Lamboley\n(Sorbonne University\, France).\n\n  DTSTART;TZID=America/Los_Angeles:20250423T160000 DTEND;TZID=America/Los_Angeles:20250423T170000 LAST-MODIFIED:20250201T040324Z LOCATION:PDL C-038 SUMMARY:: Blaschke Santal o Diagrams An Essential Tool for Studying Isoperi metric Inequalities TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-23/blaschke-santal-o-diagram s-essential-tool-studying-isoperimetric-inequalities END:VEVENT BEGIN:VEVENT UID:a4ec1cce-2b8a-4db3-b062-cb7466201fcf DTSTAMP:20260617T145208Z CATEGORIES:Conferences CLASS:PUBLIC CREATED:20250305T174018Z DESCRIPTION:9:15-9:45: Jayadev Athreya\, Kronecker Factors for Pisot Linear Flows9:45-10:15: Elizabeth Field\, End-periodic homeomorphisms and volume s of 3-manifolds10:15-10:45: coffee break10:45-11:15: Paige Helms\, Matrix Soup11:15-11:45 Casey Mann\, Dynamical and Computational Tiling Problems1 2-1pm: Lunch (subsidized for students)Supported by NSF and PIMS DTSTART;TZID=America/Los_Angeles:20250424T090000 DTEND;TZID=America/Los_Angeles:20250424T120000 LAST-MODIFIED:20260121T221356Z LOCATION:PDL C-401 SUMMARY:: UW Dynamics Day TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-24/uw-dynamics-day END:VEVENT BEGIN:VEVENT UID:7d338663-929a-4d27-ab2b-36145454a458 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250421T172621Z DESCRIPTION:Speaker: Jack Kendrick\, University of Washington (Seattle)\n\n Many problems in data science and machine learning suffer from what is kno wn as the curse of dimensionality: as data becomes higher and higher dimen sional\, it gets harder and harder to learn from it. One way of combating this curse is by assuming that\, even when data lives in some high-dimensi onal space\, there exists some low-dimensional structure that can be explo ited to make learning easier. Previous work has assumed that in many high- dimensional problems\, the data actually lies on some low-dimensional subm anifold. A complementary approach is to assume that these high-dimensional problems exhibit some hidden algebraic structure that can be exploited to make learning more tractable. In this talk\, we will see two examples of problems where algebraic structure can be used to combat the curse of dime nsionality: invariant polynomial regression and kernel density estimation on algebraic varieties. DTSTART;TZID=America/Los_Angeles:20250424T123000 DTEND;TZID=America/Los_Angeles:20250424T133000 LAST-MODIFIED:20250421T172621Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Algebra In my graduate student analysis seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-24/gsas-nbsp-algebra-my-grad uate-student-analysis-seminar END:VEVENT BEGIN:VEVENT UID:1cfd8cff-5181-4866-b4c6-ef906afb2a1e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250420T025417Z DESCRIPTION:Speaker: Giovanni Inchiostro\, UW\n\nGiven a closed subscheme \ $Y\$ of a scheme \$X\$\, one can construct \$B\$ the blow-up of \$X\$ alon g \$Y\$. In this talk I will explain some special cases of the opposite si tuation: given a smooth variety \$B\$\, when can one construct another smo oth variety \$X\$ such that \$B\$ is the blow-up of \$X\$ at a smooth subv ariety \$Y\$? DTSTART;TZID=America/Los_Angeles:20250424T150000 DTEND;TZID=America/Los_Angeles:20250424T160000 LAST-MODIFIED:20250420T025424Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Smooth blow downs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-24/student-ag-seminar-smooth -blow-downs END:VEVENT BEGIN:VEVENT UID:f5921be4-e25f-4701-b5c7-1253f31c7d20 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250420T162410Z DESCRIPTION:Speaker: Dhruv Bhatia\, University of Washington\n\nA tropical curve is a graph (+ some extra data) that occurs as combinatorial informat ion associated with the limiting object of a family of smooth curves. I wi ll tell the story about how understanding the moduli space M^{trop}_{g\, n } of these gadgets can help us understand a small part of the cohomology o f  M_{g\, n}\, the moduli space of smooth projective curves. Along the way \, we'll do some mixed Hodge theory and also meet this little guy: DTSTART;TZID=America/Los_Angeles:20250424T163000 DTEND;TZID=America/Los_Angeles:20250424T173000 LAST-MODIFIED:20250506T164647Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar Tropical curves and the top weight coho mology of M g n TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-24/writing-milestone-seminar -tropical-curves-and-top-weight-cohomology-m-g-n END:VEVENT BEGIN:VEVENT UID:609129be-8431-4372-9c96-bae321c35701 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250415T195048Z DESCRIPTION:Speaker: Ting Gong\n\nAdvisor: Max Lieblich DTSTART;TZID=America/Los_Angeles:20250425T090000 DTEND;TZID=America/Los_Angeles:20250425T100000 LAST-MODIFIED:20250415T195144Z LOCATION:LOW 222 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-25/general-exam END:VEVENT BEGIN:VEVENT UID:5f627ff1-cc51-41dd-b5bd-d05938bb774c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250420T235729Z DESCRIPTION:Speaker: Yirong Yang\, University of Washington\n\n\n\nTernary graphs\, or trinity graphs\, or however people from different areas call t hem\, are graphs that avoid induced cycles of length divisible by 3. The t alk mainly consists of many pictures\, a healthy dose of graph theory\, an d some buzzwords from the ITM\, through which we explore the topology of t he independence complex of these graphs.\n\nZoom Link: https://washington. zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250425T143000 DTEND;TZID=America/Los_Angeles:20250425T152000 LAST-MODIFIED:20250420T235729Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Combinatorics and topology of ternary graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-25/1-2-3-seminar-combinatori cs-and-topology-ternary-graphs END:VEVENT BEGIN:VEVENT UID:976cf5cf-fad4-4b16-99dc-d6e93e055279 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250424T151608Z DESCRIPTION:Speaker: Haocheng Cai\n\nAdvisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20250428T130000 DTEND;TZID=America/Los_Angeles:20250428T140000 LAST-MODIFIED:20250424T151856Z LOCATION:SAV 169 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-28/general-exam END:VEVENT BEGIN:VEVENT UID:4b88149a-412c-4dd8-9b83-d5313d9f9ad6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250415T034457Z DESCRIPTION:Speaker: Soobin Cho\, University of Illinois Urbana-Champaign\n \nIn this talk\, we first discuss approximate factorizations of heat kerne ls and Green functions for purely discontinuous Markov processes. Under na tural conditions\, we show that the approximate factorization of the heat kernel is equivalent to that of the Green function. In the second part\, w e will discuss applications of these factorizations to derive two-sided he at kernel estimates for three classes of processes: stable-like processes with critical killing in $C^{1\,Dini}$ open sets\; killed stable-like proc esses with low regularity coefficients\; and non-symmetric stable processe s in $C^{1\,2-Dini}$ open sets. In particular\, we obtain sharp\, explicit two-sided estimates for the killed and censored stable processes in $C^{1 \,Dini}$ open sets. This is based on joint work with Professor Renming Son g (UIUC). DTSTART;TZID=America/Los_Angeles:20250428T143000 DTEND;TZID=America/Los_Angeles:20250428T153000 LAST-MODIFIED:20250415T034456Z LOCATION:SMI 102 SUMMARY:: Approximate factorizations for non symmetric jump processes TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-28/approximate-factorization s-non-symmetric-jump-processes END:VEVENT BEGIN:VEVENT UID:9b9d582f-bdd1-4702-bc1c-f5d340b1e1fc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250428T182302Z DESCRIPTION:Speaker: Sean Richardson\n\nGiven a surface\, we can define a c ertain manifold of complex \ndimension 2 whose complex structure encodes a particular flow over the \noriginal surface. Such manifolds have recently become a popular \nframework for studying inverse problems\, and this tal k will provide an \nintroduction to these so called 'transport twistor spa ces'. DTSTART;TZID=America/Los_Angeles:20250428T163000 DTEND;TZID=America/Los_Angeles:20250428T173000 LAST-MODIFIED:20250428T182412Z LOCATION:CMU B-006 SUMMARY:: nbsp SDGS Transport Twistor Spaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-28/nbsp-sdgs-transport-twist or-spaces END:VEVENT BEGIN:VEVENT UID:38d15457-f115-487a-a0e9-04dc91617673 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250416T202521Z DESCRIPTION:Speaker: Nelson Niu\n\nAdvisor: Danny Shi DTSTART;TZID=America/Los_Angeles:20250429T123000 DTEND;TZID=America/Los_Angeles:20250429T133000 LAST-MODIFIED:20250416T202619Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-29/general-exam END:VEVENT BEGIN:VEVENT UID:d3ecd730-8c6e-4d5e-8ef7-699268ec20d7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250424T211138Z DESCRIPTION:Speaker: Jakub Witaszek (Princeton)\n\n\n\n\n\n\n\n\nTitle: Hod ge Theory of Singularities in Positive Characteristic\n\nAbstract: I will start by reviewing various Hodge-theoretic invariants of complex singulari ties. After that\, I will discuss an approach to interpreting these invari ants using methods from positive characteristic. This is based on joint wo rk with Tatsuro Kawakami.\n\n \n\nTitle pretalk: F-splittings\, singularit ies\, and local cohomology\n\nAbstract pretalk: As an introduction to the main talk\, I will review various notions of singularities in characterist ic zero and positive characteristic.\n\n\n\n\n\n \n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250429T134500 DTEND;TZID=America/Los_Angeles:20250429T154500 LAST-MODIFIED:20250424T211138Z LOCATION:PDL C-38 SUMMARY:: Hodge Theory of Singularities in Positive Characteristic TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-29/hodge-theory-singularitie s-positive-characteristic END:VEVENT BEGIN:VEVENT UID:48a3af83-78c0-4243-aa4a-5d1e63ceb00c DTSTAMP:20260617T145208Z CATEGORIES:Special Events\, Student Activities CLASS:PUBLIC CREATED:20250226T225508Z DESCRIPTION:Speaker: Corrine Yap\, Georgia Tech\n\nUniform Convergence is a one-woman play\, written and performed by mathematician Corrine Yap. It j uxtaposes the stories of two women trying to find their place in a white m ale-dominated academic world. The first is of historical Russian mathemati cian Sofia Kovalevskaya\, who was lauded as a pioneer for women in science but only after years of struggle for recognition.  Her life’s journey is told through music and movement\, in both Russian and English. The second is of a fictional Asian-American woman\, known only as “Professor”\, tryin g to cope with the prejudice she faces in the present. As she teaches an i ntroductory real analysis class\, she uses mathematical concepts to draw p arallels to the race and gender conflicts she encounters in society today. DTSTART;TZID=America/Los_Angeles:20250429T163000 DTEND;TZID=America/Los_Angeles:20250429T173000 LAST-MODIFIED:20250312T162946Z LOCATION:PAA 110 SUMMARY:: Uniform Convergence TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-29/uniform-convergence END:VEVENT BEGIN:VEVENT UID:dafd8508-d22a-495f-ba52-1f8535142e1a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201354Z DESCRIPTION:Speaker: Corrine Yap\, Georgia Institute of Technology\n\nAbstr act:\n\nThe mathematics of origami\, or paper folding\, raises rich questi ons in combinatorics and computational geometry\, particularly related to flat-foldability: given a crease pattern\, represented as a planar graph\, and an assignment of mountains and valleys to the creases\, can the confi guration fold flat? Perhaps surprisingly\, this decision problem for “glob al” flat-foldability is NP-hard in general. In contrast\, “local' flat-fol dability (folding flat in a small ball around each vertex) can be characte rized by a few simple combinatorial conditions.\n\nIn this talk\, we’ll pr esent a new probabilistic perspective on flat-foldable origami. We conside r the uniform distribution on locally flat-foldable crease patterns and a natural Markov chain called the face-flip chain which approximately sample s from this distribution. We prove that this chain mixes rapidly for sever al natural families of origami tessellations—the square twist\, the square grid\, and the Miura-ori—as well as for the single-vertex crease pattern. We also show that on the square grid\, a random locally flat-foldable con figuration is exponentially unlikely to be globally flat-foldable. Joint w ork with Tom Hull and Marcus Michelen.\n\nThe pre-seminar will be a crash course on Markov chains and approximate sampling. No familiarity with orig ami will be assumed for either talk.\n\nNote: This talk begins with a pre- seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMee ting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250430T153000 DTEND;TZID=America/Los_Angeles:20250430T170000 LAST-MODIFIED:20250415T205217Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Random Locally Flat Foldable Origami TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-30/random-locally-flat-folda ble-origami END:VEVENT BEGIN:VEVENT UID:5407f0ef-1f7f-4dd5-abd4-38deb3fc66bf DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250115T195614Z DESCRIPTION:Speaker: Andrey Gogolev\, Ohio State U.\n\nThe smooth rigidity question in dynamics asks when an a priori weak form of equivalence autom atically leads to a much stronger form of equivalence. It turns out that r igidity is common in the context of Anosov flows ---  a continuous conjuga cy is automatically smooth. I will survey progress on this question and gi ve several geometric applications to the rigidity of negatively curved man ifolds. Based on joint work with F. Rodriguez Hertz. DTSTART;TZID=America/Los_Angeles:20250430T160000 DTEND;TZID=America/Los_Angeles:20250430T170000 LAST-MODIFIED:20250429T004321Z LOCATION:PDL C-038 SUMMARY:: Smooth rigidity for Anosov flows and geometric applications TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-04-30/smooth-rigidity-anosov-fl ows-and-geometric-applications END:VEVENT BEGIN:VEVENT UID:6e6e9f5a-cb76-4708-b31c-c4da9baddd94 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250429T085516Z DESCRIPTION:Speaker: Ruirui Wu\, University of Washingotn\n\nWe prove a uni queness result for the Calderón problem for the quasilinear conductivity e quation on a bounded domain in R^n. The proof of the result is based on th e higher order linearization method. In contrast to the higher dimensional case\, the proof involves delicate analysis of the correction terms of Bu khgeim type complex geometric solutions (CGOs)\, which have only limited d ecay. To prove our results\, we construct suitable families of CGOs whose phase functions have and do not have critical points. We also combine stat ionary phase analysis with estimates for the correction terms of the CGOs. This is a joint work with Tony Liimatainen at University of Helsinki. DTSTART;TZID=America/Los_Angeles:20250501T123000 DTEND;TZID=America/Los_Angeles:20250501T133000 LAST-MODIFIED:20250429T085516Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Calder n problem for the quasilinear conductivity equat ion in dimension 2 TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-01/gsas-nbsp-calder-n-proble m-quasilinear-conductivity-equation-dimension-2 END:VEVENT BEGIN:VEVENT UID:13ffab95-8faa-4a1e-b79c-e0eb738f3fcc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250417T202824Z DESCRIPTION:Speaker: Sándor Kovács\, UW\n\nHodge theory is a powerful tool that connects topological and holomorphic/algebraic information about comp lex manifolds. In particular\, there is a close connection between singula r and coherent cohomology of complex manifolds. The natural embedding of c onstant functions in the structure sheaf induces a natural morphism from s ingular cohomology of a complex manifold with complex coefficients to the coherent cohomology of its structure sheaf. Hodge theory tells us\, among many other things\, that this natural map is surjective. This may be inter preted as saying that the coherent cohomology of the structure sheaf has t opological origin. Kollár's principle states that when that happens\, it l eads to vanishing theorems for certain (coherent) cohomology groups. I wil l explain how this principle leads to an elegant proof (due to Kollár) of the Kodaira vanishing theorem. Time permitting\, I will mention how the sa me principle can be used to prove more general vanishing theorems. DTSTART;TZID=America/Los_Angeles:20250501T150000 DTEND;TZID=America/Los_Angeles:20250501T160000 LAST-MODIFIED:20250417T202832Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Koll r s principle Topological origin lea ds to vanishing theorems TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-01/student-ag-seminar-nbsp-k oll-r-s-principle-topological-origin-leads-vanishing END:VEVENT BEGIN:VEVENT UID:84faf257-d666-4301-aa68-2682aa733b67 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250428T210857Z DESCRIPTION:Speaker: Luz Grisales Gomez\n\nLinear incidence geometry is per haps one of the oldest subjects studied in Mathematics. It is concerned wi th configurations of points\, lines\, and hyperplanes that are given by in cidence constraints. Despite the beauty of the proofs and the valuable ins ights that they offer to any geometer\, this subject has been dormant for a while. This is because\, in recent decades\, new algorithmic approaches to verifying such theorems have been proven to be highly effective to the point that theorems of this kind can now be checked with minimal human inp ut. However\, a new set of questions has now arisen with Fomin and Pylyavs kyy's Master Theorem\, which not only gives a completely new approach to t he subject by associating tilings of a surface to incidence theorems but a lso is a useful tool for proving and generating incidence theorems in all dimensions. DTSTART;TZID=America/Los_Angeles:20250501T163000 DTEND;TZID=America/Los_Angeles:20250501T173000 LAST-MODIFIED:20250428T210915Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar On the master theorem connecting incide nces and tilings TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-01/writing-milestone-seminar -master-theorem-connecting-incidences-and-tilings END:VEVENT BEGIN:VEVENT UID:8e906e8c-142d-44e2-81bc-a95e5a7d751f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250423T194541Z DESCRIPTION:Speaker: Jackson Morris\, University of Washington\n\n\n\nLocal ization techniques are essential to modern mathematics. In commutative alg ebra and algebraic geometry\, localization of rings lets one 'zoom-in' on a problem to a particular place\, and in nice situations one can assemble all these simpler zoomed-in problems to answer the original one. This idea of 'zooming-in' or 'inverting irrelevant information is extremely powerfu l\, and its categorical generalizations lead to deep understandings of glo bal structures. In this talk\, I will introduce the notion of localization from ring theory and then move on to its categorical analogue\, giving ex amples along the way. I will end with a case-study of brief overview of th e telescope conjecture\, a long and fabled story about the difference betw een two particular families of localizations.\n\nZoom Link: https://washin gton.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250502T143000 DTEND;TZID=America/Los_Angeles:20250502T152000 LAST-MODIFIED:20250423T194541Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Localizations and Justifications TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-02/1-2-3-seminar-localizatio ns-and-justifications END:VEVENT BEGIN:VEVENT UID:4bcf2688-bb26-4046-897d-75044e212130 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20250218T215416Z DESCRIPTION:Speaker: Jarod Alper\, University of Washington\n\nIn the rich landscape of algebraic varieties\, moduli spaces stand out as some of the most enchanting varieties\, capturing the imagination of algebraic geomete rs with their profound elegance and deep connections to other branches of mathematics.   Moduli\, the plural of modulus\, is a term coined by Rieman n to describe a space whose points afford an alternative description as ce rtain classes of geometric objects.  We will trace the origins of moduli s paces through the discoveries of Riemann\, Hilbert\, Grothendieck\, Mumfor d\, and Deligne\, as a means to explain many of the fundamental concepts o f moduli spaces.  We will then survey how the foundations of moduli theory have further evolved over the last 50 years. DTSTART;TZID=America/Los_Angeles:20250502T153000 DTEND;TZID=America/Los_Angeles:20250502T163000 LAST-MODIFIED:20250218T215806Z LOCATION:ECE 125 SUMMARY:: Evolution of Moduli TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-02/evolution-moduli END:VEVENT BEGIN:VEVENT UID:18e1d605-0177-4fe0-9be0-3a46c5338c99 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250428T210232Z DTSTART;TZID=America/Los_Angeles:20250505T043000 DTEND;TZID=America/Los_Angeles:20250505T053000 LAST-MODIFIED:20250428T210232Z LOCATION:CMU-B006 SUMMARY:: SDGS Ricci flow on surfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-05/sdgs-ricci-flow-surfaces END:VEVENT BEGIN:VEVENT UID:d09972e1-4ea0-4616-a7fa-bab7cc0e4215 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250424T040220Z DESCRIPTION:Speaker: Tom Trogdon\, University of Washington\n\nThis talk wi ll give an overview of the study of algorithms on random data\, and in par ticular\, algorithms from numerical linear algebra (NLA) on random matrice s.  The combination of ideas from numerical linear algebra and random matr ices goes back\, at least\, to the seminal work of Goldstine and von Neuma nn.  The works of Trotter\, Silverstein\, Edelman\, Dumitriu & Edelman\, P frang\, Deift & Menon\, and many others\, developed these ideas further.   A core subset of NLA algorithms\, the Krylov subspace methods\, play part icularly well with existing random matrix theory.  Through the study of ra ndom orthogonal polynomials\, as perturbations of deterministic orthogonal polynomials\, the concentration phenomenon in these methods can be explai ned using local laws from random matrix theory.  We will use these ideas\, and methods\, to efficiently and robustly perform spike detection in the spiked sample covariance model\, and move towards PCA without the SVD. DTSTART;TZID=America/Los_Angeles:20250505T143000 DTEND;TZID=America/Los_Angeles:20250505T153000 LAST-MODIFIED:20250424T040219Z LOCATION:SMI 102 SUMMARY:: Towards PCA without nbsp the SVD Lanczos based spike detection TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-05/towards-pca-without-nbsp- svd-lanczos-based-spike-detection END:VEVENT BEGIN:VEVENT UID:683498f4-2c08-4913-8dd4-95c3c0548c78 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250305T173834Z DESCRIPTION:Speaker: Jon Chaika\, Utah\n\nConsider a point mass traveling i n a polygon. It travels in a straight line\, with constant speed\, until i t hits a side\, at which point it obeys the rules of elastic collision. Wh at can we say about this? When all the angles of the polygon are rational multiples of pi\, the unit tangent bundle is foliated by invariant surface s and we know a lot about it. In the case when at least one of the angles is irrational\, it is much less understood\, though from approximating wit h the rational case we know a couple of things. Kerckhoff\, Masur and Smil lie proved that there exists a billiard in an irrational polygon where the billiard flow is 'ergodic' with respect to the natural measure. This mean s that the amount of time the typical trajectory spends in a given box in the table (or even a cube in the three dimensional unit tangent bundle) is proportional to its area (or volume). This talk will present two results\ , both concerning a strengthening of ergodicity called ‘weak mixing’:\n\n1 ) A strengthening of Kerckhoff\, Masur and Smillie’s result: There exists a polygon where billiard flow is weakly mixing with respect to the natural volume on the unit tangent bundle.\n\n2) A classification of the rational polygons where the billiard flow is weakly mixing with respect to the nat ural area on the invariant surfaces that foliate the unit tangent bundle. \n\nThis talk will introduce ergodic theory and weak mixing\, connect bill iards in rational polygons to translation surfaces\, before moving on to t he ‘Veech criterion\,’ the key tool to show weak mixing. Open questions wi ll be presented and no previous knowledge of billiards\, ergodic theory no r translation surfaces will be assumed. This is joint work with Francisco Arana-Herrera and Giovanni Forni. DTSTART;TZID=America/Los_Angeles:20250506T133000 DTEND;TZID=America/Los_Angeles:20250506T153000 LAST-MODIFIED:20250423T004259Z LOCATION:PDL C-401 SUMMARY:: Billiards in polygons TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-06/billiards-polygons END:VEVENT BEGIN:VEVENT UID:6ad9467b-f450-498d-aedb-ddd1abdc5a39 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201729Z DESCRIPTION:Speaker: Yuval Roichman\, Bar-Ilan University\n\nAbstract:\n\nT he \$k\$-th root enumerator of a finite group \$G\$ is an integer valued f unction on \$G\$\, which counts the number of \$k\$-th roots of each eleme nt. A long-standing open problem is to classify the finite groups\, for wh ich the \$k\$-th root enumerator is a proper (non-virtual) character for a ll \$k\$. Another well known problem is to construct Gelfand models\; thes e are multiplicity-free sums of all the irreducible characters of a finite group.\n\nIt will be shown that for all classical Weyl groups\, all \$k\$ -th root enumerators are proper\, extending the results of Scharf and Thib on. The proof is constructive and presents the root enumerator as a multip licity-free sum of higher Lie characters. Related constructions of Gelfand models for classical and affine Weyl groups will be presented. Applicatio ns to permutation statistics will be described.\n\nBased on joint works wi th Ron Adin and Pal Hegedus.\n\nNote: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.\n \nJoin Zoom Meeting: https://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250507T153000 DTEND;TZID=America/Los_Angeles:20250507T170000 LAST-MODIFIED:20250502T200553Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: On permutation statistics root enumeration and Gelfand models TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-07/permutation-statistics-ro ot-enumeration-and-gelfand-models END:VEVENT BEGIN:VEVENT UID:9c76df34-4c5d-402a-8340-c9a117560e03 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250304T015457Z DESCRIPTION:Speaker: Shen Zhang\, Michigan State\n\nThis study explores an inverse problem approach to Mean Field Games\n(MFGs) using Cauchy data aro und unknown stationary states. We propose\na novel method that generalizes MFG formulations\, relaxes probability\nmeasure constraints\, and introdu ces high-order linearization around\nnon-trivial stationary states. These contributions enhance the unique\nidentifiability of key system parameters \, enabling effective model\nreconstruction with applications in economics \, finance\, and\ntransportation. DTSTART;TZID=America/Los_Angeles:20250507T160000 DTEND;TZID=America/Los_Angeles:20250507T170000 LAST-MODIFIED:20250307T112103Z LOCATION:PDL C-038 SUMMARY:: Inverse Problems in Mean Field Games Decoding via Cauchy Data joi nt w IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-07/inverse-problems-mean-fie ld-games-decoding-cauchy-data-joint-w-ip-seminar END:VEVENT BEGIN:VEVENT UID:8241d887-0481-40e9-9333-f5bc4fcde38e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250506T163336Z DESCRIPTION:Speaker: Cordelia Li\, University of Washington\n\nGiven a perm utation in S_n\, one can ask how many ways to decompose it into a minimal- length\, transitive product of transpositions. We show that the number of minimal transitive factorizations of the identity permutation in S_n into transpositions supported on a given quasi-threshold graph G is always divi sible by (2n-2)!/n!\, generalizing results of Hurwitz for the complete gra ph and Pak for the star graph. We give a combinatorial formula for the quo tient as a sum over certain weighted spanning trees of G called factorizat ion trees. DTSTART;TZID=America/Los_Angeles:20250508T163000 DTEND;TZID=America/Los_Angeles:20250508T173000 LAST-MODIFIED:20250506T163347Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar Minimal transitive factorizations suppo rted on quasi threshold graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-08/writing-milestone-seminar -minimal-transitive-factorizations-supported-quasi END:VEVENT BEGIN:VEVENT UID:edd9aef2-f431-4ae7-b01f-77d98322e7d5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250505T042907Z DESCRIPTION:Speaker: Ting Gong\, University of Washington\n\n\n\nIn this ta lk\, I am going to introduce and give intuitions about many geometric obje cts via examples. We are going to start with ideas in manifolds\, step tow ards schemes and algebraic spaces\, and finally talk about stacks and 'ger bes' via the many variations of the example of a bug eyed line.\n\nZoom Li nk: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250509T143000 DTEND;TZID=America/Los_Angeles:20250509T152000 LAST-MODIFIED:20250505T042907Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar From manifolds schemes and group actions TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-09/1-2-3-seminar-manifolds-s chemes-and-group-actions END:VEVENT BEGIN:VEVENT UID:0935d6e2-cb96-4c1e-bf01-1c3f4df9ec0f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250428T210609Z DTSTART;TZID=America/Los_Angeles:20250512T043000 DTEND;TZID=America/Los_Angeles:20250512T053000 LAST-MODIFIED:20250428T210636Z LOCATION:CMU-B006 SUMMARY:: SDGS TBD TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-12/sdgs-tbd END:VEVENT BEGIN:VEVENT UID:7f842a56-1ed0-4d64-8460-dffd60197ea7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250424T040444Z DESCRIPTION:Speaker: Krzysztof Burdzy\, University of Washington\n\nArchime des' principle says that the upward buoyant force that is exerted on a bod y submerged in a fluid is equal to the weight of the displaced fluid. Ther e is no mathematical literature on Archimedes' principle except for two ar ticles co-authored by the speaker. This is because the principle can be ea sily derived from standard macroscopic laws of physics regarding pressure. I will show how the principle can be derived from Newtonian mechanics app lied to 'ideal gas' consisting of point particles. Besides the derivation from a 'lower level' theory\, the main novelty is that the macroscopic flo ating object is allowed to move\, unlike in the traditional proof.\n\nThe talk is based on joint research with Mauricio Duarte\, Carl-Eric Gauthier\ , Robin Graham\, Jacek Małecki and Jaime San Martin.\n\n  DTSTART;TZID=America/Los_Angeles:20250512T143000 DTEND;TZID=America/Los_Angeles:20250512T153000 LAST-MODIFIED:20250424T040511Z LOCATION:SMI 102 SUMMARY:: On Archimedes Principle for a ball in ideal gas TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-12/archimedes-principle-ball -ideal-gas END:VEVENT BEGIN:VEVENT UID:f6f18fd3-7e80-4066-a457-d1a7bb8d2c42 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250507T181936Z DESCRIPTION:Speaker: Soham Ghosh (UW)\n\n\n\n\n\n\n\n\nTalk title: Fourier- Mukai transform and a generalized Poincaré formula for tropical abelian va rieties\n\n \n\nAbstract: I will present a (cohomological) Fourier-Mukai t ransform for tropical abelian varieties and provide some applications\, in cluding a generalized Poincaré formula for any nondegenerate line bundle o n tropical abelian varieties. Based on joint work with Farbod Shokrieh.\n \n \n\nPretalk title: Fourier transform and intersection theory on complex abelian varieties\n\n \n\nAbstract: As an introduction to the tak\, I wil l describe the Fourier-Mukai transform on the chow ring of complex abelian varieties and how Beauville used it to obtain a generalized Poincaré form ula for symmetric ample line bundles on abelian varieties. \n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250513T134500 DTEND;TZID=America/Los_Angeles:20250513T154500 LAST-MODIFIED:20250507T181936Z LOCATION:PDL C-38 SUMMARY:: Fourier Mukai transform and a generalized Poincar formula for tro pical abelian varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-13/fourier-mukai-transform-a nd-generalized-poincar-formula-tropical-abelian END:VEVENT BEGIN:VEVENT UID:e651df25-776c-43ca-93a3-90903239c48f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201817Z DESCRIPTION:Speaker: Monica Vazirani\, University of California Davis\n\nAb stract:\n\nThe \$G\$-skein module for the 3-torus is finite dimensional by a result of Gunningham-Jordan-Safronov. For \$G = GL_N\$ and \$SL_N\$\,  there is a lovely combinatorial formula for these dimensions in terms of t he partitions of \$N\$ and the gcd of their parts.  Our formula arises fro m studying skeins on the 2-torus via the representation theory of the doub le affine Hecke algebra of type \$A\$ and its connection to quantum \$D\$- modules.\n\nThis is joint work with Sam Gunningham and David Jordan.\n\nNo te: This talk begins with a pre-seminar (aimed at graduate students) at 3: 30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Meeting: https://washi ngton.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250514T153000 DTEND;TZID=America/Los_Angeles:20250514T170000 LAST-MODIFIED:20250502T200637Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Skeins on tori TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-14/skeins-tori END:VEVENT BEGIN:VEVENT UID:2cd78115-14e3-49ae-b696-7f8b99ba7704 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250513T081404Z DESCRIPTION:Speaker: Leo Zhang\, University of Washington (Seattle)\n\nThe Calderón Problem is an inverse problem motivated by the physical question of whether one can find the conductivity of the interior of a medium by ma king voltage and current measurements on the boundary. We will prove that these “measurements” uniquely determine isotropic conductivities in dimens ion 3 and higher\, a result due to Sylvester and Uhlmann in 1987.  DTSTART;TZID=America/Los_Angeles:20250515T123000 DTEND;TZID=America/Los_Angeles:20250515T133000 LAST-MODIFIED:20250513T081404Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Calder n Problem for isotropic conductivity equation in dimension 3 and higher TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-15/gsas-nbsp-calder-n-proble m-isotropic-conductivity-equation-dimension-3-and-higher END:VEVENT BEGIN:VEVENT UID:b482f04d-6488-4009-be10-6eeacc8f86ac DTSTAMP:20260617T145208Z CATEGORIES:Lectures CLASS:PUBLIC CREATED:20250512T223706Z DESCRIPTION:Speaker: Andres Fernandez Herrero (U Penn)\n\n\n\n\n\n\n\n\n\nA bstract: This series of lectures aims to introduce the audience to some re cent tools in the construction of good moduli spaces for stacks.\n\nWe wil l begin with a brief introduction to Halpern-Leistner's theory of Theta-st ability. We will then discuss 'Infinite dimensional GIT'\, which is a tech nique to prove the existence of good moduli spaces for the semistable loci of certain stability conditions. Throughout the lecture series\, our guid ing example will be the moduli problem of decorated principal bundles on a smooth projective curve. If time allows\, I will also explain how to use these techniques to obtain compact moduli spaces of decorated vector bundl es for families of nodal curves.\n\n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250515T130000 DTEND;TZID=America/Los_Angeles:20250515T140000 LAST-MODIFIED:20250512T223706Z LOCATION:PDL C-38 SUMMARY:: Lectures on moduli of decorated bundles on curves I TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-15/lectures-moduli-decorated -bundles-curves-i END:VEVENT BEGIN:VEVENT UID:453cacca-2e1d-4e33-b581-e1c1c87922d3 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250511T200629Z DESCRIPTION:Speaker: Arkamouli Debnath\, UW\n\nIn this talk\, which is main ly based on the paper https://arxiv.org/abs/2202.12876 by \nDaniel Halpern -Leistner\, Kimoi Kemboi\, I will try to investigate the derived category of linear GIT quotients by rank 2 groups\, such as \$\operatorname{GL}_2\$ . The main focus of the talk is to understand what is called the 'window c ategory' which will give us an exceptional collection. Under very special conditions this will also be a full exceptional collection. DTSTART;TZID=America/Los_Angeles:20250515T150000 DTEND;TZID=America/Los_Angeles:20250515T160000 LAST-MODIFIED:20250511T200639Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Understanding the derived category of lin ear GIT quotients by rank 2 groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-15/student-ag-seminar-nbsp-u nderstanding-derived-category-linear-git-quotients-rank END:VEVENT BEGIN:VEVENT UID:48689a60-16e9-4eae-a356-2bb45ce411bc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250506T164122Z DESCRIPTION:Speaker: Roundtable Discussion\n\nA roundtable discussion about people's experiences with the writing milestone so far. We'll discuss how people found professors to review their milestone\, how they chose their topic and how the writing process went. First years are encouraged to atte nd with their questions about the writing milestone\, and older students a re invited to come share their experience! DTSTART;TZID=America/Los_Angeles:20250515T163000 DTEND;TZID=America/Los_Angeles:20250515T173000 LAST-MODIFIED:20250513T180119Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Experience nbsp Roundtable TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-15/writing-milestone-experie nce-nbsp-roundtable END:VEVENT BEGIN:VEVENT UID:43233ab2-16e5-4257-b07b-a3687b34899a DTSTAMP:20260617T145208Z CATEGORIES:Lectures CLASS:PUBLIC CREATED:20250512T223749Z DESCRIPTION:Speaker: Andres Fernandez Herrero (U Penn)\n\n\n\n\n\n\n\n\n\nA bstract: This series of lectures aims to introduce the audience to some re cent tools in the construction of good moduli spaces for stacks.\n\nWe wil l begin with a brief introduction to Halpern-Leistner's theory of Theta-st ability. We will then discuss 'Infinite dimensional GIT'\, which is a tech nique to prove the existence of good moduli spaces for the semistable loci of certain stability conditions. Throughout the lecture series\, our guid ing example will be the moduli problem of decorated principal bundles on a smooth projective curve. If time allows\, I will also explain how to use these techniques to obtain compact moduli spaces of decorated vector bundl es for families of nodal curves.\n\n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250516T143000 DTEND;TZID=America/Los_Angeles:20250516T153000 LAST-MODIFIED:20250512T223748Z LOCATION:PDL C-38 SUMMARY:: Lectures on moduli of decorated bundles on curves II TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-16/lectures-moduli-decorated -bundles-curves-ii END:VEVENT BEGIN:VEVENT UID:d639828d-0abf-4472-8b92-64e51ebf6a7a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250512T203346Z DESCRIPTION:Speaker: Jay Reiter\, University of Washington\n\n\n\nClassical faithfully flat descent is a powerful technique from algebraic geometry t hat allows us to prove things about “harder objects” by extending them to “easier objects\,” and then coming back down. In this talk\, we’ll see how an even richer theory of descent can be obtained by passing to derived ca tegories. We will present the resulting theory of “derived descent” as an entry point to “derived algebraic geometry\,” the theory obtained by repla cing ordinary commutative rings with homotopical objects called E-infinity rings. Along the way\, we’ll give an algebra-forward introduction to spec tra as “the derived category of the sphere” and see how the mechanism for doing derived descent is exactly the Adams spectral sequence.\n\nZoom Link : https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250516T143000 DTEND;TZID=America/Los_Angeles:20250516T152000 LAST-MODIFIED:20250512T203346Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Descent derived descent and the Adams spectral sequ ence TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-16/1-2-3-seminar-descent-der ived-descent-and-adams-spectral-sequence END:VEVENT BEGIN:VEVENT UID:ad1d874a-636d-4017-99a2-022e97f85c62 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20250327T174156Z DESCRIPTION:Speaker: Nick Trefethen\, Harvard University\n\nWhat does it me an to be a scientist\, a mathematician\, a numerical mathematician in 2025 ?  This event will be a reflection on such questions based on fifteen imag es from my intellectual life past and present. DTSTART;TZID=America/Los_Angeles:20250516T153000 DTEND;TZID=America/Los_Angeles:20250516T163000 LAST-MODIFIED:20250414T234251Z LOCATION:ECE 125 SUMMARY:: Joint MATH AMATH Colloquium Fifteen Images for Discussion TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-16/joint-math-amath-colloqui um-fifteen-images-discussion END:VEVENT BEGIN:VEVENT UID:281cd601-3053-43f8-ba5f-c97162769e45 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities\, Workshops CLASS:PUBLIC CREATED:20250510T033854Z DESCRIPTION:Speaker: Monica Vazirani\, UC Davis\n\nAbstract:If you want to count the number of tiles in your floor\, you probably will not count each one individually\, but be lazy and look for a shortcut. For instance\, if the room is rectangular and walking part of its perimeter you discover th ere are 8 tiles along the north wall and 6 tiles along the west wall\, you expect 48 tiles total. This shortcut employs the power of symmetry. (And a bit of algebra.)In this talk\, we’ll discuss a powerful counting method that is often referred to as Burnside’s Lemma\, although it goes back to F robenius (1887) and Cauchy (1845). This method uses symmetry and a bit mor e algebra. We will illustrate the lemma by counting necklaces strung with colored beads. Other applications include counting isomers of a given mole cule\, crystal structures\, chords in a twelve-tone musical scale\, Latin squares\, and finite automata. DTSTART;TZID=America/Los_Angeles:20250518T130000 DTEND;TZID=America/Los_Angeles:20250518T140000 LAST-MODIFIED:20260121T212646Z LOCATION:ARC 147 SUMMARY:: Applications of symmetry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-18/applications-symmetry END:VEVENT BEGIN:VEVENT UID:181f4226-97da-47e7-9438-bbd29d86b15c DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250508T213129Z DESCRIPTION:Speaker: Linhang Huang\n\nAdvisor: Stefan Steinerberger DTSTART;TZID=America/Los_Angeles:20250519T090000 DTEND;TZID=America/Los_Angeles:20250519T100000 LAST-MODIFIED:20250508T213243Z LOCATION:DEM 112 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-19/general-exam END:VEVENT BEGIN:VEVENT UID:8dee8559-7670-401d-9dbc-20128d657cbf DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250506T024254Z DESCRIPTION:Speaker: Stefan Steinerberger\, University of Washington\n\n\n \n Suppose we want to distribute n points in the unit cube in such a way t hat any axis-parallel rectangle anchored in the origin (a natural generali zation of the CDF) captures a number of points approximately proportional to its volume\; how do we do it and what's the best we can hope for?  We'l l discuss the state of the art and explain the idea behind the existing ar guments. This leads to another natural problem: if someone gives us n iid uniformly distributed random points on the unit interval\, how regular can we make the set by deleting (joint work with Bilyk '25) or moving (Smirno v-Vershynin '25) some of them?   \n\n  DTSTART;TZID=America/Los_Angeles:20250519T143000 DTEND;TZID=America/Los_Angeles:20250519T153000 LAST-MODIFIED:20250506T024254Z LOCATION:SMI 102 SUMMARY:: Regularizing random points by deleting a few TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-19/regularizing-random-point s-deleting-few END:VEVENT BEGIN:VEVENT UID:2b246bdc-5b8b-41e7-83f3-4e1cfbdb0d9c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20240925T211625Z DESCRIPTION:Speaker: Tamara Broderick\, MIT\n\nPractitioners will often ana lyze a data sample with the goal of applying any conclusions to a new popu lation. For instance\, if economists conclude microcredit is effective at alleviating poverty based on observed data\, policymakers might decide to distribute microcredit in other locations or future years. Typically\, the original data is not a perfect random sample from the population where po licy is applied --- but researchers might feel comfortable generalizing an yway so long as deviations from random sampling are small\, and the corres ponding impact on conclusions is small as well. Conversely\, researchers m ight worry if a very small proportion of the data sample was instrumental to the original conclusion. So we propose a method to assess the sensitivi ty of conclusions to the removal of a very small fraction of the data set. Manually checking all small data subsets is computationally infeasible\, so we propose an approximation based on the classical influence function. Our method is automatically computable for common estimators. We provide e rror bounds on approximation performance and a low-cost exact lower bound on sensitivity. We find that sensitivity is driven by a signal-to-noise ra tio in the inference problem\, does not disappear as data accrues\, and is not decided by misspecification. Empirically we find that many data analy ses are robust\, but the conclusions of several influential economics pape rs can be changed by removing (much) less than 1% of the data. DTSTART;TZID=America/Los_Angeles:20250519T153000 DTEND;TZID=America/Los_Angeles:20250519T163000 LAST-MODIFIED:20250515T000050Z LOCATION:Gates Commons CSE1 691 SUMMARY:: An Automatic Finite Sample Robustness Check Can Dropping a Little Data Change Conclusions TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-19/automatic-finite-sample-r obustness-check-can-dropping-little-data-change END:VEVENT BEGIN:VEVENT UID:58fc615b-0cc2-4a18-b5ad-1d069bb1e04f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250428T210745Z DTSTART;TZID=America/Los_Angeles:20250519T163000 DTEND;TZID=America/Los_Angeles:20250519T173000 LAST-MODIFIED:20250519T223850Z LOCATION:CMU-B006 SUMMARY:: SDGS nbsp Morse Bott Theory nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-19/sdgs-nbsp-morse-bott-theo ry-nbsp END:VEVENT BEGIN:VEVENT UID:a073144d-a9a3-4e90-ab48-43b2afab9ae5 DTSTAMP:20260617T145208Z CATEGORIES:Lectures CLASS:PUBLIC CREATED:20250512T223910Z DESCRIPTION:Speaker: Andres Fernandez Herrero (U Penn)\n\n\n\n\n\n\n\n\n\nA bstract: This series of lectures aims to introduce the audience to some re cent tools in the construction of good moduli spaces for stacks.\n\nWe wil l begin with a brief introduction to Halpern-Leistner's theory of Theta-st ability. We will then discuss 'Infinite dimensional GIT'\, which is a tech nique to prove the existence of good moduli spaces for the semistable loci of certain stability conditions. Throughout the lecture series\, our guid ing example will be the moduli problem of decorated principal bundles on a smooth projective curve. If time allows\, I will also explain how to use these techniques to obtain compact moduli spaces of decorated vector bundl es for families of nodal curves.\n\n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250520T100000 DTEND;TZID=America/Los_Angeles:20250520T110000 LAST-MODIFIED:20250514T225110Z LOCATION:PDL C-401 SUMMARY:: Lectures on moduli of decorated bundles on curves III TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/lectures-moduli-decorated -bundles-curves-iii END:VEVENT BEGIN:VEVENT UID:0ac9f90b-19c5-4478-bcf2-d00039e204bf DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250515T182916Z DESCRIPTION:Speaker: Sameera Vemulapalli\, Harvard University\n\nIn 1963\, Tate conjectured that the algebraic cycles of a variety can be described i n terms of the Galois invariants of certain étale cohomology groups. In th is talk\, I'll discuss a proof of several new cases of the Tate conjecture for abelian varieties over finite fields\, extending previous results of Dupuy--Kedlaya--Zureick-Brown\, Lenstra--Zarhin\, Tankeev\, and Zarhin. Th is is joint work with Santiago Arango-Piñeros and Sam Frengley. DTSTART;TZID=America/Los_Angeles:20250520T110000 DTEND;TZID=America/Los_Angeles:20250520T115000 LAST-MODIFIED:20250515T182916Z LOCATION:PDL C-401 SUMMARY:: Some cases of the Tate conjecture for abelian varieties over fini te fields TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/some-cases-tate-conjectur e-abelian-varieties-over-finite-fields END:VEVENT BEGIN:VEVENT UID:280dcfe1-1074-454a-b35d-15202a217477 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20250518T142018Z DESCRIPTION:Speaker: Stephen Wang\, Rice University\n\nIn-person student ac tivities in a flipped class can be used for many different purposes\, from computational practice to concept review to development of new principles .  Over the last several years\, I have employed some guided learning acti vities that attempt to impart what one could call 'morals': truths that ca n shape students' understanding of various aspects of linear algebra at an intuitive level.  In this talk\, I will present some of these activities and their rationales\, as well as student responses and outcomes.     DTSTART;TZID=America/Los_Angeles:20250520T120000 DTEND;TZID=America/Los_Angeles:20250520T130000 LAST-MODIFIED:20260121T213128Z LOCATION:Math Department Conference Room SUMMARY:: Teaching Brown Bag nbsp Inquiry based Activities for Imparting Li near Algebra Morals TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/teaching-brown-bag-nbsp-i nquiry-based-activities-imparting-linear-algebra-morals END:VEVENT BEGIN:VEVENT UID:5e5d8ce9-ff3c-45fa-8dbc-f2ad18f75277 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250514T231122Z DESCRIPTION:Speaker: Sarah Witherspoon\, Texas A&M\n\nAbstract: Many rings of interest can be described as twisted tensor products of other rings\, f or example\, quantum polynomial rings\, skew group algebras\, Ore extensio ns\, and Drinfeld doubles. Other rings may be viewed as deformations of th ese. In this talk\, we will introduce twisted tensor product algebras with examples\, including examples of their deformations.\n\n  DTSTART;TZID=America/Los_Angeles:20250520T134500 DTEND;TZID=America/Los_Angeles:20250520T144500 LAST-MODIFIED:20250514T231305Z SUMMARY:: Twisted tensor product algebras TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/twisted-tensor-product-al gebras END:VEVENT BEGIN:VEVENT UID:42199964-f90c-4768-a917-2c9ad9eb85f9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250514T230922Z DESCRIPTION:Speaker: Sarah Witherspoon\, Texas A&M\n\nAbstract: We will int roduce some homological techniques for understanding deformations of twist ed tensor product algebras. We will first describe a general construction of twisted tensor product resolution. We will\nthen focus on the special c ases of group actions and Hopf algebra actions on Koszul algebras\, with t he goal of understanding graded deformations of the corresponding twisted tensor product algebras. These include many classes of examples of interes t\, such as symplectic reflection algebras and infinitesimal Hecke algebra s. DTSTART;TZID=America/Los_Angeles:20250520T143000 DTEND;TZID=America/Los_Angeles:20250520T153000 LAST-MODIFIED:20250514T231113Z LOCATION:PDL C-38 SUMMARY:: Cohomology and deformations of twisted tensor product algebras TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/cohomology-and-deformatio ns-twisted-tensor-product-algebras END:VEVENT BEGIN:VEVENT UID:7e0bb239-8c6e-4cb7-815b-658bbd5f6e0c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250508T043609Z DESCRIPTION:Speaker: Katharina Eichinger\, INRIA\n\n\n\nLipschitz transport maps between two measures are useful tools for transferring analytical pr operties\, such as functional inequalities. The most well-known result in this field is Caffarelli’s contraction theorem\, which shows that the opti mal transport map from a Gaussian to a uniformly log-concave measure is gl obally Lipschitz. Note that the transfer of analytical properties does not depend on the optimality of the transport map. This is why several works have established Lipschitz bounds for other transport maps\, such as those derived from diffusion processes\, as introduced by Kim and Milman. Here\ , we use the control interpretation of the transport vector field inducing the transport map and a coupling strategy to obtain Lipschitz bounds for this map between asymptotically log-concave measures and their Lipschitz p erturbations. This talk is based on a joint work with Giovanni Conforti.\n \n  DTSTART;TZID=America/Los_Angeles:20250520T143000 DTEND;TZID=America/Los_Angeles:20250520T153000 LAST-MODIFIED:20250508T043749Z LOCATION:Padelford C-401 SUMMARY:: Lipschitz continuity of diffusion transport maps from a control p erspective TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/lipschitz-continuity-diff usion-transport-maps-control-perspective END:VEVENT BEGIN:VEVENT UID:f645e951-6cf4-4434-bec5-7b0db0c8f9e5 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20250509T163855Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsGraduate Progra m - PalCommittee ReportsGraduate Admissions - KoblitzNew BusinessExecutive SessionAdjournmentMINUTESThe regular meeting of the faculty of the Depart ment of Mathematics was held via Zoom at 3:30pm PST\, May 20\, 2025. Max L ieblich\, Chair\, presided over the meeting. Rose Choi was the recording s ecretary.Chair's RemarksCourse evaluations will now be run by default each quarter.Teaching coverage of TAs should be approved by faculty supervisor s ahead of time.The College is moving forward with shared services but it’ s been pushed back by a year for our department and a handful of others. T here will be considerable cuts to our TA budget next year.Max Lieblich sen t an email to faculty with proposals from the Structure Committee. The flo or was opened for questions and discussion.AnnouncementsThe Graduate Progr am Committee proposed the creation of a stacked certificate master’s degre e (Master of Science in Mathematics of Data Optimization and Generative Mo dels) that can provide the department with an additional source of revenue while future-proofing the grad program. A faculty committee has already m et and decided on a curriculum which was then reviewed by an industry advi sory board and adjusted accordingly. The target audience will  be both und ergrads interested in advanced math but not PhD research and local profess ionals who are looking to strengthen their theoretical base. Students will be required to receive a certificate in Mathematics of Optimization in Da ta Science and a Certificate in Mathematics of Random Models and Generativ e AI. This can be expanded or combined with other certificates and lead to shared revenues. Classes will be hybrid and are in line with similar prog rams in Applied Math and Statistics. Due to the scale of this project\, vo lunteers are absolutely necessary. The launch goal is Fall 2026.Committee ReportsThe entering class of 2025 will be considerably smaller than in pre vious years with five anticipated doctoral and one masters student.ADJOURN MENTThere being no new business\, the meeting passed into executive sessio n at 4:59pm. DTSTART;TZID=America/Los_Angeles:20250520T153000 DTEND;TZID=America/Los_Angeles:20250520T163000 LAST-MODIFIED:20251007T063244Z LOCATION:Zoom & PDL C-138 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-20/faculty-meeting END:VEVENT BEGIN:VEVENT UID:17f28a10-4ddf-4bfe-8293-37328b6b4654 DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250519T074501Z DESCRIPTION:Speaker: Maddy Brown\, University of Washington (Seattle)\n\nTh e Activated Random Walk (ARW) is one example of self-organized criticality \, which describes stochastic processes that tend to a critical point with out outside influence. In this talk\, we will discuss ongoing work about t he ARW and its universal properties. Then we will review some totally unre lated (but fun) work that the speaker did as a summer Data Intern at Sport s Reference! DTSTART;TZID=America/Los_Angeles:20250522T123000 DTEND;TZID=America/Los_Angeles:20250522T133000 LAST-MODIFIED:20250519T074522Z LOCATION:PDL C-401 SUMMARY:: GSAS nbsp Activated Random Walk Also Sports Data nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-22/gsas-nbsp-activated-rando m-walk-also-sports-data-nbsp END:VEVENT BEGIN:VEVENT UID:02922225-3d6e-43f3-a9a0-c7ce56cd097c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250520T182818Z DESCRIPTION:Speaker: Andres Fernandez Herrero (UPenn)\n\n\n\n\n\n\n\n\n\nTi tle: Projectivity of the moduli of branchvarieties\n\n \n\nAbstract: The m oduli of (reduced) equidimensional subvarieties of projective space is oft en not complete. In 2010\, Alexeev and Knutson introduced a compactificati on called the moduli of branchvarieties. This is a proper Deligne-Mumford stack parameterizing equidimensional varieties equipped with a finite morp hism to projective space. In principle\, this is a great parameter space t o carry out GIT constructions of moduli of varieties. However\, there is o ne caveat to this: Alexeev and Knutson left as an open problem whether the ir proper DM stack is projective. \n\n \n\nIn this talk\, I will explain a proof of projectivity obtained in joint work with Dan Halpern-Leistner\, Trevor Jones and Ritvik Ramkumar. This is used to obtain a moduli of 'Noet her normalized' varieties via classical GIT\, which is birational to a mod uli of K-semistable polarized varieties (indeed\, the leading order term o f the line bundle is the so-called CM line bundle).\n\n\n\n\n\n\n\n  DTSTART;TZID=America/Los_Angeles:20250522T133000 DTEND;TZID=America/Los_Angeles:20250522T143000 LAST-MODIFIED:20250520T182818Z LOCATION:PDL C-38 SUMMARY:: Projectivity of the moduli of nbsp branchvarieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-22/projectivity-moduli-nbsp- branchvarieties END:VEVENT BEGIN:VEVENT UID:36f1bd05-f3f7-4c58-aaa6-6ee910ed6ab3 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250519T052043Z DESCRIPTION:Speaker: Jackson Morris\, UW\n\nThe Picard group of a ring is a powerful invariant worth computing. Galois descent is a powerful tool for passing information from a larger and more understandable ring to a more complicated and often more interesting ring. In this talk\, we will use Ga lois descent to compute the derived Picard group by passing to a homotopic al context. We will introduce a useful generalization of the Picard group and discuss how it interacts with the Galois theory of rings and ring spec tra. Finally\, we will discuss a famous Galois extension involving topolog ical K-theory to compute the Picard group of real K-theory\, \$\operatorna me{Pic}(KO)\$. DTSTART;TZID=America/Los_Angeles:20250522T150000 DTEND;TZID=America/Los_Angeles:20250522T160000 LAST-MODIFIED:20250519T052121Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Galois descent and the Picard group of K theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-22/student-ag-seminar-nbsp-g alois-descent-and-picard-group-k-theory END:VEVENT BEGIN:VEVENT UID:0f34bd27-a290-4dc5-b456-245ee195d6d9 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250512T150025Z DESCRIPTION:Speaker: Curtiss Lyman\n\nSchrodinger Operators with Lattice In variant Potentials\n\nAdvisor: Alexis Drouot DTSTART;TZID=America/Los_Angeles:20250522T150000 DTEND;TZID=America/Los_Angeles:20250522T160000 LAST-MODIFIED:20250512T150142Z LOCATION:PDL C-401 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-22/final-exam END:VEVENT BEGIN:VEVENT UID:75aaeacc-eb71-4255-bf8e-e48488d6de02 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250506T164250Z DESCRIPTION:Speaker: Arkamouli Debnath\, University of Washington\n\nTaking quotients in algebraic geometry is difficult\, mainly because you don't j ust want a topological quotient but also a variety/scheme structure on it. Geometric Invariant Theory (GIT) gives one possible way to form quotients . On the other hand\, derived categories are homological tools that one as sociates to algebro-geometric objects (such as schemes or stacks) in a sim ilar way as one associates various algebraic invariants (such as the homot opy groups\, singular cohomology\, etc) to topological spaces. In my writi ng milestone I have explored derived categories that show up in the contex t of geometric invariant theory\, which will be the content of my talk. DTSTART;TZID=America/Los_Angeles:20250522T163000 DTEND;TZID=America/Los_Angeles:20250522T173000 LAST-MODIFIED:20250513T181825Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar nbsp Geometric Invariant Theory and Der ived Categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-22/writing-milestone-seminar -nbsp-geometric-invariant-theory-and-derived-categories END:VEVENT BEGIN:VEVENT UID:4f8728ae-94c3-4753-9ab2-4e46ef2a52b5 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250512T150443Z DESCRIPTION:Speaker: Paige Helms\n\nCounting Reciprocal Geodesics on Square Tiled Surfaces\n\nAdvisor: Jayadev Athreya DTSTART;TZID=America/Los_Angeles:20250523T103000 DTEND;TZID=America/Los_Angeles:20250523T113000 LAST-MODIFIED:20250512T150619Z LOCATION:SAV 131 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-23/final-exam END:VEVENT BEGIN:VEVENT UID:58d791a8-4f5a-4cec-8937-cf994234c798 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250518T212701Z DESCRIPTION:Speaker: Cameron Wright\, University of Washington\n\n\n\nCompl ex analytic geometry is among the most successful fusions of analysis and algebra in mathematics\, and much of this is reliant on the fact that the usual absolute value on \$\mathbb{C}\$ is highly unique. But what happens when we try to do analytic geometry with other absolute values or other fi elds? In the (more-typical) non-archimedean situation\, the metric spaces defined on rational points are particularly badly-behaved\, and we are in need of a 'fix' to have a coherent notion of analytic geometry. We survey some of these pathological properties\, describe how they can be remedied using inspiration from functional analysis\, and see how this remedy affor ds us powerful analytic techniques familiar from the complex setting.\n\nZ oom Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250523T143000 DTEND;TZID=America/Los_Angeles:20250523T152000 LAST-MODIFIED:20250518T212734Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Snapshots from Non Archimedean Analytic Geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-23/1-2-3-seminar-snapshots-n on-archimedean-analytic-geometry END:VEVENT BEGIN:VEVENT UID:fe30378f-0eb4-4e5e-ba03-e954a492c30d DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250512T150654Z DESCRIPTION:Speaker: Emily Casey\n\nParameterizations and rectifiability vi a geometric functions and singular integral operators\n\nAdvisor: Tatiana Toro DTSTART;TZID=America/Los_Angeles:20250523T150000 DTEND;TZID=America/Los_Angeles:20250523T160000 LAST-MODIFIED:20250512T150804Z LOCATION:CMU 230 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-23/final-exam-0 END:VEVENT BEGIN:VEVENT UID:ef906e25-26b9-4ffe-b92e-3b748bbd4948 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20250212T193506Z DESCRIPTION:Speaker: Andy Loveless\n\nExtreme grade pressure\, student lack of preparedness or engagement\, and accommodations overload... do you fee l an increase in these external forces on your classes?  Some of our facul ty have been thinking a lot about these issues.  We have met with groups a round campus\, presented ideas at the MAA meetings\, and are trying to fin d support for some actionable proposals.  Will you join the conversation? \n\nIt would be nice to share some of what we have tried and get more inpu t and data from others in our department.  We will center our discussion o n 2 questions...\n\n1. What external forces are making your classes less e ffective/joyful?\n\n2. If we created resources on mitigating and replying to external student issues\, what would you find most useful in such resou rces?\n\n  DTSTART;TZID=America/Los_Angeles:20250527T000000 DTEND;TZID=America/Los_Angeles:20250527T235900 LAST-MODIFIED:20250516T202900Z LOCATION:PDL C-38 SUMMARY:: A Joyful Learning Model TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-27/joyful-learning-model END:VEVENT BEGIN:VEVENT UID:cd95b46d-827b-4c74-be5f-1b19e8e239d2 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250520T190553Z DESCRIPTION:Speaker: Brian Nugent\n\n'Moduli of Very Ample Line Bundles'\n \nAdvisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20250527T140000 DTEND;TZID=America/Los_Angeles:20250527T150000 LAST-MODIFIED:20250520T191349Z LOCATION:PDL C-38 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-27/final-exam END:VEVENT BEGIN:VEVENT UID:cbc4cd1b-a9c3-4dff-91ee-4c7393bb1621 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20250509T163927Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsSheldon Levias\ , Associate Director for the Engineering Academic CenterCommittee ReportsU ndergraduate Program - ThomasCareer Development - BilleyGraduate Program - PevtsovaNew BusinessExecutive SessionAdjournmentMINUTESThe regular meetin g of the faculty of the Department of Mathematics was held via Zoom at 3:3 0pm PST\, May 27\, 2025. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.Chair's RemarksMax Lieblich updated the department on the climate of the graduate program and funding. There has been no news at this stage so nothing definitive can be stated but ext ensions beyond the fifth year will be few and far between\, there are a se ries of cuts in the horizon\, foreign enrollments may drop as complication s arise with student visas\, and TAs should anticipate working the full 20 hours per week.AnnouncementsSheldon Levias\, Associate Director for the E ngineering Academic Center (EAC)\, shared information on resources availab le to students at the EAC. Math faculty are invited to volunteer at a stud y session for Pathways for Inclusive Excellence (PIE) students at Loew Hal l on June 6th\, as well as to hold office hours at the facility for additi onal student support. Reach out to Sheldon at srl1@uw.edu if you would lik e to volunteer.Committee ReportsThe Undergraduate Program Committee propos ed the following:Add two new courses: Math 303 (The Unreasonable Elegance of Mathematics) and Math 200-201 (Discrete Mathematics). Details were sent via email. A vote was held by unanimous consent and passed.Add Math 200 t o the core of math’s BA/BS degree plans. A vote was held by unanimous cons ent and passed.Replace the current “competitive” admissions process for th e math major with one where students can enter at any time after meeting a set of minimum requirements. A vote was held by unanimous consent and pas sed.Change Math 336 to a topics class in analysis. A vote was held by unan imous consent and passed.The UPC also gave an overview of the current curr iculum and contrasted that with the new curriculum.The Career Development Committee added a new element to the Career Transition Series wherein stud ents who completed internships over the summer shared their experiences an d gave advice on the internship process. Many students received an interns hip this year so the department was able to place almost all of the remain ing students into a TAship. In the Fall\, faculty volunteers are needed (e specially those who have recently gone through the academic job process) t o provide guidance to graduating students interested in pursuing a researc h and teaching career. There will also be an industrial panel on Thursday with former students Clayton Barnes\, Rebecca Hoberg\, and Tvrtko Tadic. M any more events and volunteer opportunities are coming up so stay tuned.Th e Graduate Program Committee proposed two new linear algebra courses: Math 554 (The Matrix) and Math 555 (The Matrix Reloaded). A vote was held by u nanimous consent and passed. The committee also proposes updating the prer equisites to graduate courses in regard to undergraduate enrollment in the se courses including restricting independent study to only current graduat e students. A vote was held by unanimous consent and passed.ADJOURNMENTThe re being no new business\, the meeting passed into executive session at 5: 06pm. DTSTART;TZID=America/Los_Angeles:20250527T153000 DTEND;TZID=America/Los_Angeles:20250527T163000 LAST-MODIFIED:20251007T062753Z LOCATION:Zoom & PDL C-138 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-27/faculty-meeting END:VEVENT BEGIN:VEVENT UID:284c53eb-ab66-46db-b2ad-10feb0cbabdc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201957Z DESCRIPTION:Speaker: Katie Waddle\, University of Michigan\n\nAbstract:\n\n A fundamental problem in spherical distance geometry aims to recover an \$ n\$-tuple of points on a 2-sphere in \$\mathbb{R}^3\$\, viewed up to orien ted isometry\, from \$O(n)\$ input measurements. This talk will discuss an algebraic solution using only the four arithmetic operations. We will sho w how a new type of frieze pattern can be employed to arrange the measurem ent data. These friezes exhibit glide symmetry and a version of the Lauren t phenomenon.\n\nNote: This talk begins with a pre-seminar (aimed at gradu ate students) at 3:30–4:00. The main talk starts at 4:10.\n\nJoin Zoom Mee ting: https://washington.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250528T153000 DTEND;TZID=America/Los_Angeles:20250528T170000 LAST-MODIFIED:20250523T201708Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Spherical friezes TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-28/spherical-friezes END:VEVENT BEGIN:VEVENT UID:bdcc14c9-82b3-4c58-b1ba-23b61918b5e6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250227T180256Z DESCRIPTION:Speaker: Nick Edelen (Notre Dame)\n\nCapillary surfaces model t he geometry of liquids meeting a container at an angle\, and arise natural ly as (constrained) minimizers of the Gauss free energy.  We give improved estimates for the size of the singular set of minimizing capillary hypers urfaces: the singular set is always of codimension at least 4 in the surfa ce\, and this estimate improves if the capillary angle is close to $0$\, $ \pi/2$\, or $\pi$. For capillary angles that are close to $0$ or $\pi$\, o ur analysis is based on a rigorous connection between the capillary proble m and the one-phase Bernoulli problem.  This is joint work with Otis Chodo sh and Chao Li. DTSTART;TZID=America/Los_Angeles:20250528T160000 DTEND;TZID=America/Los_Angeles:20250528T170000 LAST-MODIFIED:20250525T061108Z LOCATION:PDL C-038 SUMMARY:: Improved regularity for minimizing capillary hypersurfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-28/improved-regularity-minim izing-capillary-hypersurfaces END:VEVENT BEGIN:VEVENT UID:5de19526-daae-4cae-8f17-be53ebf54795 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250526T202350Z DESCRIPTION:Speaker: Haoming Ning\, UW\n\nWalking around the department\, y ou might hear murmurs of strange words like “Du Bois complexes” and “highe r Du Bois singularities”. What are those? Has anyone ever bothered giving their definitions?! In this talk\, we will do the unthinkable — introduce the Du Bois complex and cubical hyperresolutions through a series of concr ete examples. Along the way\, we will discuss its Hodge theoretic origins and explore its profound applications towards MMP\, vanishing theorems\, a nd moduli theory. DTSTART;TZID=America/Los_Angeles:20250529T150000 DTEND;TZID=America/Los_Angeles:20250529T160000 LAST-MODIFIED:20250526T202411Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp What are Du Bois singularities TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-29/student-ag-seminar-nbsp-w hat-are-du-bois-singularities END:VEVENT BEGIN:VEVENT UID:6e90a11e-2253-487b-9680-f051fe43fb4c DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20250520T183928Z DESCRIPTION:Speaker: Clayton Barnes\, Rebecca Hoberg\, and Tvrtko Tadic\n \nIn a recent AMS Survey of New Doctorate Recipients\, 33 percent accept p ositions in government\, business and industry.  What are these jobs like?  How do you find them?  And\, are they interesting jobs?  To provide insi ght into these questions\, we will hold our annual Industrial Panel Discus sion featuring four UW alums from the PhD program.  The speakers on the pa nel are Clayton Barnes at Amazon Web Services\, Rebecca Hoberg at Meta\, a nd Tvrtko Tadic at Microsoft.   All are invited to attend!\n\nBiographical Sketch of the Panelists: \n\nRebecca (Becca) Hoberg graduated from UW in 2017 with a PhD in math\, focused on discrete optimization and advised by Thomas Rothvoss. She was pretty undecided about what direction she would g o after grad school\, but ended up at Facebook/Meta and has spent the last 6 years there. The first five years were as a data scientist and about a year ago she switched to become a data engineer. Her current focus is on p erformance\, reliability and efficiency for videos\, and she's based in th e Seattle area.\n\nTvrtko Tadić is a Senior Applied Scientist at Microsoft \, working on integrating real-time data into AI\, with a focus on advance d file search in M365 Copilot. He earned his PhD in Mathematics from the U niversity of Washington\, where he studied probability under the supervisi on of Krzysztof Burdzy. At Microsoft\, Tvrtko has contributed to various p rojects\, including Bing Maps\, local search\, the digital assistant Corta na\, knowledge mining and graph learning within Office 365. Tvrtko is also a Visiting Scientist in the department\, leveraging UW resources for rese arch on probabilistic methods in data science and AI. This work\, originat ing at Microsoft and partly developed there\, was featured at this year's JMM in Seattle and ICLR in Singapore. \n\nClayton Barnes graduated in 2018 with his PhD in Mathematics from UW\, studying probability under Krzyszto f Burdzy\, and also jointly earned his MS in Statistics from the Statistic s Department. After graduating\, he spent 1 year at the Université de Neuc hâtel in Switzerland to work with Michel Benaim as part of a Swiss NSF gra nt\, then 3 years at the Technion-Israel Institute of Technology as a Zuck erman Postdoctoral Fellow\, working with Leonid Mytnik and Haya Kaspi. In 2022 he moved to industry\, working as a Research Scientist at Amazon Web Services as part of the EKS/Kubernetes service working on the open source software Karpenter. When he's not yelling at Claude or trying to remember CLI commands\, he develops algorithms to approximate solutions for various flavors of the Bin-Packing Problem\, and designs/analyzes experiments. He stays somewhat in touch with academia\, actively refereeing articles and has some papers accepted recently-in the area of traveling wave solutions to SPDEs.\n\nThis talk will be hosted by Sara Billey and Linhang Huang.   DTSTART;TZID=America/Los_Angeles:20250529T160000 DTEND;TZID=America/Los_Angeles:20250529T173000 LAST-MODIFIED:20250604T224551Z LOCATION:PDL C-38 SUMMARY:: Industrial Panel 2025 TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-29/industrial-panel-2025 END:VEVENT BEGIN:VEVENT UID:21da3f76-d76e-44d4-9621-28d083202b6f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250506T164351Z DESCRIPTION:Speaker: Jay Reiter\, University of Washington\n\nIn the 1960s\ , Novikov noticed that descent along the unit map for MU\, the ring spectr um representing complex cobordism\, was a particularly fruitful method for computing the homotopy groups of spheres. Within a few years\, Quillen ob served a connection between MU and geometric objects called formal groups. This was the beginning of chromatic homotopy theory and\, among many othe r discoveries\, revealed new Bott-periodicity-like symmetries in the homot opy groups of spectra. Since the 2000s\, many of these results are best co nceptually understood through the language of stacks in which they take on a rich arithmetic flavor. In this talk\, we'll catch a glimpse of how the moduli stack of formal groups controls stable homotopy theory\, and in pa rticular how understanding its geometry offers conceptual explanations for these periodicity phenomena in the homotopy groups of spectra. DTSTART;TZID=America/Los_Angeles:20250529T163000 DTEND;TZID=America/Los_Angeles:20250529T173000 LAST-MODIFIED:20250525T210429Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar Chromatic homotopy theory and the modul i of formal groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-29/writing-milestone-seminar -chromatic-homotopy-theory-and-moduli-formal-groups END:VEVENT BEGIN:VEVENT UID:f8762514-053a-4214-b0b0-af1499e6141f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250524T194759Z DESCRIPTION:Speaker: Carina Hong (Stanford Math / Stanford Law / Axiom AI) \n\nAbstract:\n\nThe field of AI for Mathematics has moved its focus from solving benchmark problems with numerical solutions to generating formal p roofs to research-level mathematical questions. In this survey talk we wil l cover recent developments and future directions in AI4Math\, including t he following three topics:\n\n\n \n Formalization and auto-formalization\, w here natural language math contents (with LaTeX formulas) is converted int o Lean\, Isabelle\, and Coq programs.\n \n \n Automated theorem proving using LLMs\, where transformer‑based models now guide symbolic search of formal proofs and achieve competitive performances on benchmarks such as Mini-F2 F and PutnamBench. \n \n \n Conjecturing\, where programming language helps w ith new knowledge generation in Euclidean Geometry and pairing conjecturer and prover gives advances in performance. DTSTART;TZID=America/Los_Angeles:20250530T153000 DTEND;TZID=America/Los_Angeles:20250530T163000 LAST-MODIFIED:20250530T002348Z LOCATION:PDL C-38 SUMMARY:: AI Meets Mathematics A Survey of Recent Breakthroughs and Emergin g Directions TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-05-30/ai-meets-mathematics-surv ey-recent-breakthroughs-and-emerging-directions END:VEVENT BEGIN:VEVENT UID:ed4dabaf-fddb-49f5-a3a2-6dd85189123c DTSTAMP:20260617T145208Z CATEGORIES:Special Events CLASS:PUBLIC CREATED:20250510T034156Z DTSTART;TZID=America/Los_Angeles:20250601T100000 DTEND;TZID=America/Los_Angeles:20250601T110000 LAST-MODIFIED:20250510T034556Z LOCATION:Savery Hall SUMMARY:: UW Math Olympiad TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-01/uw-math-olympiad END:VEVENT BEGIN:VEVENT UID:7a9c9ff4-05f9-4663-aefb-1c66fbe55320 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250527T183533Z DESCRIPTION:Speaker: Shiping Cao\, University of Washington\n\n\n\n\n\nIn t his talk\, we study two-sided heat kernel estimates for symmetric reflecte d jump diffusions on Ahlfors regular domains in metric measure spaces. For symmetric jump processes on metric measure spaces\, it has been establish ed that mixed stable-like heat kernel estimates hold if and only if a two- sided jump kernel condition and a cut-off Sobolev inequality are satisfied . So the key is to show that the cut-off Sobolev inequality holds for refl ected jump diffusions on Ahlfors regular domains. For this\, we show that there is  a suitable extension operator from the Ahlfors regular domain to the whole metric space.  \n\nThis talk is based on joint work with Zhen-Q ing Chen.\n\n  DTSTART;TZID=America/Los_Angeles:20250602T143000 DTEND;TZID=America/Los_Angeles:20250602T153000 LAST-MODIFIED:20250527T184014Z LOCATION:SMI 102 SUMMARY:: Heat Kernels for reflected jump diffusions on Ahlfors regular dom ains nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-02/heat-kernels-reflected-ju mp-diffusions-ahlfors-regular-domains-nbsp END:VEVENT BEGIN:VEVENT UID:e7156f16-2810-4d21-87b7-e99270c241f5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250529T001809Z DESCRIPTION:Speaker: Prasit Bhattacharya (NMSU)\n\nFrom the point of view o f functor calculus\, stable homotopy theory is a linear approximation of u nstable homotopy theory. Functor calculus is a technique that allows tools from stable homotopy theory to approximate unstable homotopy. In this tal k\, we will focus on the functor calculus due to Michael Weiss and introdu ce its equivariant analog which is a recent joint work with Yang Hu. Time permitting\, we will discuss potential applications to equivariant geometr y. DTSTART;TZID=America/Los_Angeles:20250602T143000 DTEND;TZID=America/Los_Angeles:20250602T163000 LAST-MODIFIED:20250529T001818Z LOCATION:THO 235 SUMMARY:: Equivariant Weiss Calculus nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-02/equivariant-weiss-calculu s-nbsp END:VEVENT BEGIN:VEVENT UID:987a9463-2050-4e25-ad57-514644d12279 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250428T210904Z DTSTART;TZID=America/Los_Angeles:20250602T163000 DTEND;TZID=America/Los_Angeles:20250602T173000 LAST-MODIFIED:20250519T223925Z LOCATION:CMU-B006 SUMMARY:: SDGS nbsp Hormander s Propagation of Singularities TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-02/sdgs-nbsp-hormander-s-pro pagation-singularities END:VEVENT BEGIN:VEVENT UID:505cf70f-7453-4f13-9e0a-b722c07f27aa DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250527T200139Z DESCRIPTION:Speaker: Jesse Wolfson\, UC Irvine\n\n There are still complete ly open fundamental questions about polynomials in one variable. One examp le is Hilbert’s 13th Problem\, a conjecture going back long before Hilbert . Indeed\, the invention of algebraic topology grew out of an effort to un derstand how the roots of a polynomial depend on the coefficients. The goa l of this talk is to explain part of the circle of ideas surrounding these questions\, discuss partial progress and explore current obstructions. Th is is ongoing joint work with Benson Farb and Mark Kisin\, as well as with Claudio Gomez-Gonzales\, Sidhanth Raman and Alex Sutherland. DTSTART;TZID=America/Los_Angeles:20250603T110000 DTEND;TZID=America/Los_Angeles:20250603T120000 LAST-MODIFIED:20250602T234135Z LOCATION:PDL C-401 SUMMARY:: Perspectives on Hilbert s 13th Problem TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-03/perspectives-hilbert-s-13 th-problem END:VEVENT BEGIN:VEVENT UID:151d58c3-d933-40a4-8e4d-53b19b327760 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250529T002041Z DESCRIPTION:Speaker: Jackson Morris (UW) \n\nIn the 80s\, Mahowald used the bo-Adams spectral sequence to compute the v1-periodicity in the stable ho motopy groups of spheres. Towards computing this spectral sequence\, one m ust compute the ring of cooperations for bo. In motivic homotopy theory\, there is a spectrum representing Hermitian K-theory called kq\, which has many properties similar to bo. I will discuss the analogous computations i n motivic homotopy theory\, where the computational complexity increases d ramatically. We will compute the ring of cooperations for Hermitian K-theo ry over the real numbers and show what this indicates for the real kq-Adam s spectral sequence. Time permitting\, we will discuss connections with C2 -equivariant homotopy theory in joint work with Guchuan Li\, Sarah Peterse n\, and Liz Tatum. DTSTART;TZID=America/Los_Angeles:20250603T133000 DTEND;TZID=America/Los_Angeles:20250603T153000 LAST-MODIFIED:20250529T002108Z LOCATION:PDL C-401 SUMMARY:: The ring of cooperations for real Hermitian K theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-03/ring-cooperations-real-he rmitian-k-theory END:VEVENT BEGIN:VEVENT UID:95f75d9a-603f-4411-a79f-3b0cefe8ddcc DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250603T185109Z DESCRIPTION:Speaker: Juan Salinas\n\n'On the Moduli of Configurations and t heir Representations'\n\nAdvisor: Max Lieblich DTSTART;TZID=America/Los_Angeles:20250603T140000 DTEND;TZID=America/Los_Angeles:20250603T150000 LAST-MODIFIED:20250603T185507Z LOCATION:PDL C38 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-03/final-exam END:VEVENT BEGIN:VEVENT UID:7064b5c3-6daa-47c7-868c-7e540b26f6d7 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210452Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsMath AI Lab - A lperCommittee ReportsGraduate Program - PevtsovaNew BusinessExecutive Sess ionAdjournmentMINUTESThe regular meeting of the faculty of the Department of Mathematics was held in PDL C-38 at 3:30pm PST\, June 3\, 2025. Max Lie blich\, Chair\, presided over the meeting. Rose Choi was the recording sec retary.Chair's RemarksMax Lieblich announced that Teaching Professor Jenni Taggart will be retiring this year. He thanked her for her constant\, pos itive\, and wonderful presence in the department.The department’s summer r evenue this year nearly matched our research cost recovery and we are stil l looking into new revenue sources. Given how streamlined and efficient ou r department already is in regards to student hours\, teaching\, etc.\, th e next academic year should run as normal despite the on-going situation a t the College.AnnouncementsThe Math AI lab was started in Spring 2022 as X LL (Experimental Lean Lab). It has now run 30-40 projects with undergrads through great mentorship from our grad students\, especially Vasily Ilin\, Leopold Mayer\, and Herman Chau. Andy Heald has also been a wonderful fac ulty mentor. Several of these projects have led to Mathlib contributions w ith five of these projects having potential for publication. Madrona Ventu re Group has agreed to sponsor a Lean Hackathon in Fall 2025 with Leonardo de Moura\, the creator of Lean\, as a judge. We hope to appoint de Moura as an affiliate faculty member. We’d also like to offer more Math AI cours es next academic year and are looking for instructors to teach “Intro to F ormalization” and “Math and AI.”Committee ReportsThe future of the grad pr ogram is to have a target size of 60 students (Fall ‘25 projection is 94) with guaranteed graduate funding of no more than 5 years. One hope is to b e able to offer one quarter of RA support once the target has been reached . Details for this plan are available on the department’s faculty intranet . ADJOURNMENTThere being no new business\, the meeting passed into executi ve session at 4:33pm. DTSTART;TZID=America/Los_Angeles:20250603T153000 DTEND;TZID=America/Los_Angeles:20250603T163000 LAST-MODIFIED:20251006T225257Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-03/faculty-meeting END:VEVENT BEGIN:VEVENT UID:f54b1efb-db13-4935-a955-7c0fdcb00d70 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250213T230340Z DESCRIPTION:Speaker: Mihajlo Cekic (CNRS\, Paris)\n\nIn this talk I will co nsider a principal G-bundle over a closed Riemannian manifold (M\, g)\, an d equip P with a G-equivariant connection from which one defines the horiz ontal Laplacian \Delta_H\; \Delta_H is a second order sub-elliptic operato r on P. I will discuss several spectral theoretic properties of  \Delta_H: 1) (global) hypoellipticity under a density assumption of the holonomy gr oup of P\; 2) lower bounds on the first eigenvalue of \Delta_H on Fourier modes\; and 3) a quantum ergodicity result for \Delta_H on Fourier modes. The main idea is to introduce a semiclassical (microlocal) framework that we call the Borel-Weil calculus which allows to study G-equivariant operat ors on principal bundles. The semiclassical parameter in the calculus is t he highest weight in the Weyl chamber of the group G\, and the operators a re pseudodifferential in the base variable\, with values in Toeplitz opera tors on the flag manifold. This is joint work with Thibault Lefeuvre.\n\n  \n\n \n\n  DTSTART;TZID=America/Los_Angeles:20250604T160000 DTEND;TZID=America/Los_Angeles:20250604T170000 LAST-MODIFIED:20250527T051328Z LOCATION:PDL C-038 SUMMARY:: Spectral Theory of Horizontal Laplacians TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-04/spectral-theory-horizonta l-laplacians END:VEVENT BEGIN:VEVENT UID:02944325-7c4e-4ec4-91a1-3a44c6c586b9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250602T184039Z DESCRIPTION:Speaker: Michael Zeng\, UW\n\n \n\nEquivariant intersection the ory\, developed by Totaro\, Edidin-Graham and others\, is an algebraic ana logue of Borel-equivariant cohomology. The equivariant Chow groups record how algebraic cycles intersect with respect to a group action on a scheme and provide a way of defining cohomological invariants for quotient stacks . In this talk\, we will motivate these definitions through the classical Borel construction. After calculating basic examples\, we will sketch the determination of the Chow ring of the stack of smooth plane cubic curves f ollowing Fulghesu-Vistoli 2018.  DTSTART;TZID=America/Los_Angeles:20250605T150000 DTEND;TZID=America/Los_Angeles:20250605T160000 LAST-MODIFIED:20250602T184046Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar nbsp Equivariant Intersection Theory and the C how Ring of the Stack of Smooth Plane Cubics TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-05/student-ag-seminar-nbsp-e quivariant-intersection-theory-and-chow-ring-stack END:VEVENT BEGIN:VEVENT UID:b7c6b9b0-e328-4d27-9cc5-3915126faa1f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250506T164531Z DESCRIPTION:Speaker: Zawad Chowdhury\, University of Washington\n\nGraphica l Designs are subsets of a graph that perfectly average a suitable set of eigenvectors of the graph Laplacian. In this talk we'll discuss these desi gns for the hypercube graph. Some surprising connections will show up\, in cluding Hadamard Matrices and the Radon Transform! DTSTART;TZID=America/Los_Angeles:20250605T163000 DTEND;TZID=America/Los_Angeles:20250605T173000 LAST-MODIFIED:20250525T211331Z LOCATION:PDL C-401 SUMMARY:: Writing Milestone Seminar nbsp Graphical Designs of the Hypercube Graph TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-05/writing-milestone-seminar -nbsp-graphical-designs-hypercube-graph END:VEVENT BEGIN:VEVENT UID:0e3e418f-94ec-42a6-a092-d6c8e2f5bdbf DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20250528T213607Z DESCRIPTION:Speaker: Math AI Lab\n\nThe Math AI Lab will present their proj ects from the Spring quarter of 2025.  A list of our projects this quarter can be found on the Math AI Lab website: https://sites.math.washington.ed u/ai/spring2025.html DTSTART;TZID=America/Los_Angeles:20250605T173000 DTEND;TZID=America/Los_Angeles:20250605T190000 LAST-MODIFIED:20250528T213633Z LOCATION:DEN 303 SUMMARY:: Math AI Lab Poster Presentations TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-05/math-ai-lab-poster-presen tations END:VEVENT BEGIN:VEVENT UID:2771f4ac-13be-405f-adb5-1ee829a34f17 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20250603T195640Z DTSTART;TZID=America/Los_Angeles:20250605T173000 DTEND;TZID=America/Los_Angeles:20250605T190000 LAST-MODIFIED:20260121T213105Z LOCATION:Denny 303 SUMMARY:: WXML Open House TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-05/wxml-open-house END:VEVENT BEGIN:VEVENT UID:d94c4eb8-ff8e-4a83-a4b7-3e293007327f DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250603T185516Z DESCRIPTION:Speaker: Jonathan Nino-Cortes\n\n'Convex Algebraic Geometry of Higher-Rank Numerical Ranges'\n\nAdvisor: Cynthia Vinzant DTSTART;TZID=America/Los_Angeles:20250606T113000 DTEND;TZID=America/Los_Angeles:20250606T123000 LAST-MODIFIED:20250603T185637Z LOCATION:RAI 116 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-06/final-exam END:VEVENT BEGIN:VEVENT UID:930697c7-9a9e-4c4c-87c6-ac482f1bee65 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250602T183854Z DESCRIPTION:Speaker: Dan Guyer\, University of Washington\n\n\n\nKneser’s c onjecture was open for 20 years before Lovász used the Borsuk-Ulam Theorem to (tightly) bound the chromatic number of all Kneser Graphs. Since then\ , there has been much work expanding this theory by Babson-Kozlov and othe rs. Our goal will be to get a taste of the general ``test map” strategy an d illustrate a few combinatorial results that quickly fall to the power of these techniques. Such results will consist of bounds for the chromatic n umber of (hyper)graphs and embeddability results for simplicial complexes. \n\nZoom Link: https://washington.zoom.us/j/92849568892 DTSTART;TZID=America/Los_Angeles:20250606T143000 DTEND;TZID=America/Los_Angeles:20250606T152000 LAST-MODIFIED:20250602T183854Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Topological Techniques for Graph Colorings TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-06/1-2-3-seminar-topological -techniques-graph-colorings END:VEVENT BEGIN:VEVENT UID:95d89edf-8415-40c0-9de1-52586c34fc2a DTSTAMP:20260617T145208Z CATEGORIES:Ceremonies CLASS:PUBLIC CREATED:20250324T174633Z DESCRIPTION:Please join the Math Department in celebrating our 2024-2025 un dergraduate math majors.  Students need to RSVP.  More information can be found here.https://math.washington.edu/math-department-undergraduate-gradu ation-ce… DTSTART;TZID=America/Los_Angeles:20250611T100000 DTEND;TZID=America/Los_Angeles:20250611T104500 LAST-MODIFIED:20260121T222508Z LOCATION:HUB Ballroom SUMMARY:: Math Undergraduate Graduation Celebration TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-11/math-undergraduate-gradua tion-celebration END:VEVENT BEGIN:VEVENT UID:db83627f-2f16-4fc3-af07-c7c4e244f6fd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250330T201916Z DESCRIPTION:Speaker: Isaiah Siegl\, University of Washington\n\nAbstract:\n \nTatsuyuki Hikita recently proved the Stanley–Stembridge conjecture using probabilistic methods\, showing that the chromatic symmetric functions of unit interval graphs are positive in the basis of elementary symmetric fu nctions. Finding a combinatorial interpretation for these e-coefficients r emains a major open problem. Towards this goal\, I will introduce sets of strong and powerful P-tableaux and conjecture that these sets undercount a nd overcount the e-coefficients of the chromatic symmetric function. I wil l then present special cases for which strong and powerful P-tableaux coun t certain e-coefficients exactly. \n\nNote: There is no pre-seminar.\n\nJo in Zoom Meeting: https://washington.zoom.us/j/91547335974\nMeeting ID: 915  4733 5974 DTSTART;TZID=America/Los_Angeles:20250611T120000 DTEND;TZID=America/Los_Angeles:20250611T130000 LAST-MODIFIED:20250528T045054Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Upper and Lower Bounds for Chromatic Symmetric Functions TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-11/upper-and-lower-bounds-ch romatic-symmetric-functions END:VEVENT BEGIN:VEVENT UID:6c150c54-e4da-4833-b69c-6009128d1ba1 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250610T171120Z DESCRIPTION:Speaker: Isaiah Siegl\n\nAdvisor: Sara Billey DTSTART;TZID=America/Los_Angeles:20250611T120000 DTEND;TZID=America/Los_Angeles:20250611T130000 LAST-MODIFIED:20250610T171228Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-06-11/general-exam END:VEVENT BEGIN:VEVENT UID:1643d2c1-a6ae-4c48-8991-755326ba53fb DTSTAMP:20260617T145208Z CATEGORIES:Conferences CLASS:PUBLIC CREATED:20250714T210625Z DESCRIPTION:8:30 - 9:00: Coffee + Opening Remarks9:00 - 9:30: Jonathan Nova k (UCSD) - Invariant ensembles for coin flippers 9:30 - 10:00: Arnab Sen ( Minnesota) - Correlation decay of maximum weight matching on sparse graphs  10:00 - 10:30: Lucas Teyssier (UBC) - On the Naruse hook length formula a nd mixing times10:30 - 11:00: Coffee break11:00 - 11:30: Laura Eslava (UNA M) - Methods for cutting down random recursive trees11:30 - 12:00: Max New man (Indiana) - Quenched limit laws for coalescents of mean-field populati ons with selfing 12:00 - 2:00: Lunch break2:00 - 2:30: Stewart Ethier (Uta h) - Testing for dice control at craps 2:30 - 3:00: Marydol Soto Santarria ga (UDel) - The rightmost and k-rightmost columns of ordered Chinese resta urant processes up-down chains: Markov properties and intertwining3:00 - 3 :30: Coffee break + Coin Flipping Competition\, Part I3:30 - 4:00: David A ldous (UC Berkely & Washington) - Three open problems 4:00 - 4:30: Gourab Ray (UVic) - Integer valued Lipschitz functions on regular trees 5:30 - 8: 30: Informal dinner meetup at TBD DTSTART;TZID=America/Los_Angeles:20250717T000000 DTEND;TZID=America/Los_Angeles:20250717T235900 LAST-MODIFIED:20260203T003212Z LOCATION:Paccar 291 SUMMARY:: West Coast Coin Flippers Conference TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-07-17/west-coast-coin-flippers- conference END:VEVENT BEGIN:VEVENT UID:7e7dd189-8578-468c-818c-a76090f7afc2 DTSTAMP:20260617T145208Z CATEGORIES:Conferences CLASS:PUBLIC CREATED:20250714T210815Z DESCRIPTION:8:30 - 9:00: Coffee 9:00 -  9:30: Sean English (UNCW) - Pattern avoidance for online permutations 9:30 - 10:00: Qiang Wu (Minnesota) - Cl uster expansion of mean field spin glasses10:00 - 10:30: Mokshay Madiman ( UDel) - Log-concavity and Tracy-Widom universality10:30 - 11:00: Coffee br eak11:00 - 11:30: Erin Beckman (Utah State) - Chase escape with conversion 11:30 - 12:00: Stephen Melczer (Waterloo) - Automated combinatorial centra l limit theorems via ACSV12:00 - 2:00: Lunch break 2:00 - 2:30: Hugo Panzo (SLU) - Coalescing particles on an interval\, permutations\, and recursiv e trees 2:30 - 3:00: Tvrtko Tadić (Microsoft) - Node similarities and rand om projections in AI search and recommendation systems 3:00 - 3:30: Coffee break + Coin Flipping Competition\, Part II3:30 - 4:00: Kelvin Rivera-Lop ez (Gonzaga) 4:00 - 4:30: Noah Forman (McMaster) - Exchangeable hierarchie s\, tree growth\, and self-similar interval partition trees4:30 - 4:30 + e psilon: Closing Remarks DTSTART;TZID=America/Los_Angeles:20250718T000000 DTEND;TZID=America/Los_Angeles:20250718T235900 LAST-MODIFIED:20260203T003230Z LOCATION:Paccar 291 SUMMARY:: West Coast Coin Flippers Conference TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-07-18/west-coast-coin-flippers- conference END:VEVENT BEGIN:VEVENT UID:fc0260ba-6fbb-409f-b711-06fd34fcb9d9 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20250724T155343Z DESCRIPTION:Speaker: Ryan Bushling\n\n'Strong Exceptional Parameters for th e Dimension of Generalized Slices'\n\nAdvisor: Bobby Wilson DTSTART;TZID=America/Los_Angeles:20250805T090000 DTEND;TZID=America/Los_Angeles:20250805T100000 LAST-MODIFIED:20250724T155450Z LOCATION:PDL C-401 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-08-05/final-exam END:VEVENT BEGIN:VEVENT UID:bb43ded8-4069-4681-9e86-9e8585a266f3 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250730T012809Z DESCRIPTION:Speaker: Dan Guyer\, University of Washington\n\nAbstract:\n\nM otivated by trying to understand the behavior of the simplex method\, Atha nasiadis-De Loera-Zhang provided upper and lower bounds on the number of t he monotone paths on 3-polytopes. For simple 3-polytopes with \$2n\$ verti ces\, they showed that the number of monotone paths is bounded above by \$ (1+\varphi)^n\$\, with \$\varphi\$ being the golden ratio. We improve the result and show that for a larger family of graphs the number is bounded a bove by \$1.6779^n\$ times some universal constant. Meanwhile\, the best k nown construction and conjectured extremizer is approximately \$\varphi^n\ $.\n\nNote: There is no pre-seminar.\n\nJoin Zoom Meeting: https://washing ton.zoom.us/j/91547335974\nMeeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20250806T100000 DTEND;TZID=America/Los_Angeles:20250806T110000 LAST-MODIFIED:20250730T013138Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Maximizing the Number of Monotone Paths on 3 regular graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-08-06/maximizing-number-monoton e-paths-3-regular-graphs END:VEVENT BEGIN:VEVENT UID:e4182c9b-0f35-4267-b6bc-ed56d4dce851 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250724T155039Z DESCRIPTION:Speaker: Dan Guyer\n\nAdvisor: Isabella Novik DTSTART;TZID=America/Los_Angeles:20250806T100000 DTEND;TZID=America/Los_Angeles:20250806T110000 LAST-MODIFIED:20250724T155147Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-08-06/general-exam END:VEVENT BEGIN:VEVENT UID:9cf37a3d-925c-4a2a-b4d4-882d1cfafe93 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250805T185551Z DESCRIPTION:Speaker: Zawad Chowdhury\n\nAdvisors: Rekha Thomas and Stefan S teinerberger DTSTART;TZID=America/Los_Angeles:20250815T140000 DTEND;TZID=America/Los_Angeles:20250815T150000 LAST-MODIFIED:20250805T185645Z LOCATION:PDL C38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-08-15/general-exam END:VEVENT BEGIN:VEVENT UID:7bac236a-ad1d-4bac-8c7d-258e5f87f9fc DTSTAMP:20260617T145208Z CATEGORIES:Student Activities CLASS:PUBLIC CREATED:20250721T172047Z DESCRIPTION:Speaker: All Math Department Members and Alumni are invited!\n \nLet's gather for a picnic at Gas Works Park on Tuesday\, August 19\, at 6:00pm - 8:30 pm.    Please bring something to share in a potluck style.   Family is welcome to join.  Let's all wear purple shirts so we can be eas ily identified.   Games\, circus equipment\, and pets are also welcome.     Please RSVP here.  Please note\, the Duck Dodge Sailboat race will start at 7:00pm that evening.   You might want to get to the park early if you h ope to get parking.   Lots of people come to the park to watch the race.     DTSTART;TZID=America/Los_Angeles:20250819T180000 DTEND;TZID=America/Los_Angeles:20250819T203000 LAST-MODIFIED:20260121T213001Z LOCATION:Gas Works Park (Picnic Area #2) SUMMARY:: UW MATH Potluck Picnic TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-08-19/uw-math-potluck-picnic END:VEVENT BEGIN:VEVENT UID:8e546638-1aaa-4a3a-9adf-252553ed8de7 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20250911T191950Z DESCRIPTION:Speaker: Bryan Boehnke\n\nAdvisor: Bianca Viray DTSTART;TZID=America/Los_Angeles:20250922T100000 DTEND;TZID=America/Los_Angeles:20250922T110000 LAST-MODIFIED:20250911T192106Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-09-22/general-exam END:VEVENT BEGIN:VEVENT UID:fc22b9b0-2afd-43e9-8ff5-eb4dd0101190 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210546Z DESCRIPTION:AGENDA\n\n \n\n\n\n Call to Order\n Chair's Remarks\n Announcement s\n Committee Reports\n New Business\n Executive Session\n Adjournment DTSTART;TZID=America/Los_Angeles:20250923T110000 DTEND;TZID=America/Los_Angeles:20250923T120000 LAST-MODIFIED:20250807T215510Z LOCATION:PDL C-38 SUMMARY:: CANCELED: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-09-23/faculty-meeting END:VEVENT BEGIN:VEVENT UID:234619c2-2b77-487d-b3ef-11953bbc566d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250923T012158Z DESCRIPTION:Speaker: Daniel Rostamloo\, UW\n\nIn this two-part talk\, we wi ll give an introduction to Scholze’s theory of perfectoid spaces and diamo nds\, starting from basic elements of \$p\$-adic geometry and providing ma ny examples along the way. Time permitting\, we will discuss their role in Scholze’s proof of Deligne’s weight-monodromy conjecture. DTSTART;TZID=America/Los_Angeles:20250925T150000 DTEND;TZID=America/Los_Angeles:20250925T160000 LAST-MODIFIED:20250923T012158Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Perfectoid spaces and diamonds I TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-09-25/student-ag-seminar-perfec toid-spaces-and-diamonds-i END:VEVENT BEGIN:VEVENT UID:76a73080-5287-45cb-b356-6647a15d0511 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250915T231615Z DESCRIPTION:Speaker: hosted by Sara Billey\, Julia Pevstova\, and Zawad Cho wdhury\n\nAre you a graduate student applying for jobs this year?  If so\, please join us on Thursday\, September 25\, at 4:00 p.m. in C-38.  This i s an informal\, supportive gathering to share ideas and information about the job application process and to encourage camaraderie.  We will talk ab out creating application materials\, requesting letters of recommendation\ , and how to find the advertisements for jobs of interest to you.   Facult y are welcome to come share their experience with applications and on the hiring committee.   Please note\, this session is open only to students wh o are currently applying for jobs and/or planning to graduate this year.   See the Transition to Research if you just want a feeling for what comes next. DTSTART;TZID=America/Los_Angeles:20250925T160000 DTEND;TZID=America/Los_Angeles:20250925T173000 LAST-MODIFIED:20250915T231843Z LOCATION:Padelford C-38 SUMMARY:: Jobs and Cookies TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-09-25/jobs-and-cookies END:VEVENT BEGIN:VEVENT UID:f9718a37-45eb-47c7-84d3-4c5df22c550c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250925T215449Z DESCRIPTION:Speaker: Justin Bloom\n\nTitleGroup Schemes\, (co)induction\, r estriction\, and Frobenius reciprocity AbstractWe will discuss properties of some of the most fundamental operations in the representation theory of groups and of group schemes\, including Frobenius reciprocity\, featuring connections with algebraic geometry\, and homological perspectives.  DTSTART;TZID=America/Los_Angeles:20250929T113000 DTEND;TZID=America/Los_Angeles:20250929T123000 LAST-MODIFIED:20250925T215623Z LOCATION:SIG 228 SUMMARY:: Group Schemes co induction restriction and Frobenius reciprocity nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-09-29/group-schemes-co-inductio n-restriction-and-frobenius-reciprocity-nbsp END:VEVENT BEGIN:VEVENT UID:81a40825-e195-429c-aeb0-526e1cad0920 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250919T002446Z DESCRIPTION:Speaker: Haoming Ning (UW)\n\nPre-seminar Title: What are… Du B ois singularities?Pre-seminar Abstract: In this pre-talk\, we will introdu ce Du Bois singularities through a series of concrete examples. Along the way\, we will discuss its Hodge theoretic origins and explore its profound applications towards MMP\, vanishing theorems\, and moduli theory.  Title : Higher Du Bois and Higher Rational PairsAbstract: Du Bois and rational s ingularities are among the most important singularities studied in algebra ic geometry due to their nice cohomological behavior. Recently\, motivated by developments in Hodge theoretic methods\, there has been substantial i nterest in studying their higher analogs. This talk will survey recent lit erature on applications of these notions towards moduli problems and Hodge theory. I will also report on recent work (joint with Brian Nugent) exten ding the theory of higher Du Bois and higher rational singularities to pai rs\, following a guiding principle of the minimal model program. We genera lize numerous results to these higher pairs\, including “rational implies Du Bois”\, Bertini type theorems and a Kovács—Schwede type injectivity the orem.  DTSTART;TZID=America/Los_Angeles:20250930T134500 DTEND;TZID=America/Los_Angeles:20250930T153000 LAST-MODIFIED:20250919T002446Z LOCATION:PDL C-38 SUMMARY:: Higher Du Bois and Higher Rational Pairs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-09-30/higher-du-bois-and-higher -rational-pairs END:VEVENT BEGIN:VEVENT UID:7e70e8e5-5601-4829-a1e1-a3e8bee0ed15 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250923T035544Z DESCRIPTION:Speaker: Yu Yuan\, UW\n\nWe survey some new and old\, positive and negative results on a prioriestimate\, regularity\, rigidity\, and con stant rank results for specialLagrangian and quadratic Hessian equations. These equations originate incalibrated\, convex\, conformal\, and complex geometries among other fields.Unlike all other order Hessian equations suc h as the linear (Laplace) and toporder (Monge-Ampere) equations\, the regu larity/irregularity and a priori Hessian estimatesfor these two equations have not been settled yet in five and higher dimensions. DTSTART;TZID=America/Los_Angeles:20251001T150000 DTEND;TZID=America/Los_Angeles:20251001T160000 LAST-MODIFIED:20260203T003248Z LOCATION:DEN 111 SUMMARY:: Special Lagrangian nbsp and quadratic Hessian equations TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-01/special-lagrangian-nbsp-a nd-quadratic-hessian-equations END:VEVENT BEGIN:VEVENT UID:f44699fa-28d3-4d16-8ce4-b1d425a052ac DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250924T213511Z DESCRIPTION:Speaker: Colin Defant\, Harvard University\n\nAbstract:For each finite Coxeter group \$W\$ and each standard Coxeter element of \$W\$\, w e construct a triangulation of the \$W\$-permutahedron. Our proof relies o n the theory of total linear stability for Dynkin quivers. We also explore several notable combinatorial properties of these triangulations that rel ate the Bruhat order\, the noncrossing partition lattice\, and Cambrian co ngruences. Each triangulation gives an explicit mechanism for relating two different presentations of the corresponding braid group (the standard Ar tin presentation and Bessis's dual presentation). This is joint work with Melissa Sherman-Bennett and Nathan Williams. Note: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk star ts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meet ing ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251001T153000 DTEND;TZID=America/Los_Angeles:20251001T170000 LAST-MODIFIED:20250925T035141Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Braid Group Presentations and Triangulations of the Permutahedron TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-01/braid-group-presentations -and-triangulations-permutahedron END:VEVENT BEGIN:VEVENT UID:db9ef22a-c0a9-42b6-8c88-f85b12b38c44 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250929T203038Z DESCRIPTION:Speaker: Daniel Rostamloo\, UW\n\nHaving established the formal ism of adic spaces\, we will introduce perfectoid spaces and diamonds alon g with several examples. Time permitting\, we will discuss Scholze’s proof of Deligne’s weight-monodromy conjecture. DTSTART;TZID=America/Los_Angeles:20251002T150000 DTEND;TZID=America/Los_Angeles:20251002T160000 LAST-MODIFIED:20250929T203038Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Perfectoid spaces and diamonds II TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-02/student-ag-seminar-perfec toid-spaces-and-diamonds-ii END:VEVENT BEGIN:VEVENT UID:f88c8468-e1a8-4372-bc18-7fb50e561ecb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250915T232658Z DESCRIPTION:Speaker: hosted by Zawad Chowdhury\n\nThis is a new event aimed at helping us all get to know the first-year students right off the bat.  If you are a first year and willing to share a bit about your summer proj ects\, please let us know.  If you are anyone else\, please come meet our incoming students.   They want to talk with you!  This talk will be held T hursday\, October 2\, at 4:00 p.m. in C-38. This event is open to all grad students\, faculty\, and staff in Math.   DTSTART;TZID=America/Los_Angeles:20251002T163000 DTEND;TZID=America/Los_Angeles:20251002T180000 LAST-MODIFIED:20250929T204045Z LOCATION:Padelford C-38 SUMMARY:: First Year Spotlight TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-02/first-year-spotlight END:VEVENT BEGIN:VEVENT UID:9c082e04-8044-49a0-a6d7-4a570dec08b4 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250930T221711Z DESCRIPTION:Speaker: Nelson Niu\, University of Washington\n\nCategories wi th operations that are associative\, commutative\, and distributive up to isomorphism abound in mathematics: for instance\, in homotopy theory\, the y are the inputs to infinite loop space machines and K-theory functors. Bu t before we can work with such categories\, we must prove coherence theore ms for them to ensure these structures are well-behaved. In ongoing joint work with Jonathan Rubin\, we establish a general categorical approach to proving such coherence theorems versatile enough to incorporate (weak) dis tributivity laws\, module and algebra categories\, and the higher arity tw isted products that appear in equivariant settings. Building on Mac Lane’s original coherence proof for symmetric monoidal categories\, we employ to ols from logic and rewriting theory to study the relevant universal parame ter categories\, clarifying the necessary axioms. DTSTART;TZID=America/Los_Angeles:20251003T143000 DTEND;TZID=America/Los_Angeles:20251003T153000 LAST-MODIFIED:20250930T222921Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar A categorical framework for coherence theo rems TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-03/back-school-seminar-categ orical-framework-coherence-theorems END:VEVENT BEGIN:VEVENT UID:e7546221-3b59-4e42-b4be-0963fca81c7d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251005T065802Z DESCRIPTION:Speaker: Wolfgang Allred\n\nTitleThe Lyndon-Hochschild-Serre Sp ectral Sequence for Group SchemesAbstractAn essential tool for computing g roup cohomology\, the Lyndon-Hochschild-Serre(LHS) spectral sequence is a special case of the Grothendieck spectral sequence that relates the group cohomology of a group G to the cohomology of its normal subgroups and asso ciated quotients. We will examine the LHS in the context of group schemes\ , but this will first require us to talk a little bit about the subtleties involved in the quotients of group schemes. After this\, we will examine some of the applications of the LHS. DTSTART;TZID=America/Los_Angeles:20251006T113000 DTEND;TZID=America/Los_Angeles:20251006T123000 LAST-MODIFIED:20251005T065802Z LOCATION:SIG 228 SUMMARY:: The Lyndon Hochschild Serre Spectral Sequence for Group Schemes TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-06/lyndon-hochschild-serre-s pectral-sequence-group-schemes END:VEVENT BEGIN:VEVENT UID:4ede18e8-f51b-4f4d-ade0-6780e8ae34d3 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250929T220109Z DESCRIPTION:Speaker: Stefano Filipazzi (Duke)\n\nTitle: On the classificati on of algebraic varieties Abstract: The Minimal Model Program (MMP) is a p owerful tool that helps understanding varieties up to birational equivalen ce. In particular\, the MMP helps to identify three fundamental classes of varieties: Fano varieties\, K-torsion varieties\, and canonical models. I n this talk\, I will sketch how the MMP works and discuss the main propert ies of these classes of varieties\, with special focus on K-torsion variet ies.  Title: On the boundedness of fibered K-trivial varieties Abstract: A K-trivial variety X is a normal projective variety with mild singularitie s whose canonical divisor K_X is linearly trivial. Examples of K-trivial v arieties include abelian varieties\, Calabi-Yau varieties\, and hyperkähle r varieties. In dimension 2\, a K-trivial surface is either a (singular) K 3 surface or an abelian surface. Starting with dimension 3\, there is no c omplete classification of K-trivial varieties. In this talk\, I will discu ss recent progress about the classification of K-trivial varieties that ad mit a fibration. This talk is based on joint work with P. Engel\, F. Greer \, M. Mauri\, and R. Svaldi.  DTSTART;TZID=America/Los_Angeles:20251007T134500 DTEND;TZID=America/Los_Angeles:20251007T153000 LAST-MODIFIED:20250929T220109Z LOCATION:PDL C-38 SUMMARY:: On the boundedness of fibered K trivial varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-07/boundedness-fibered-k-tri vial-varieties END:VEVENT BEGIN:VEVENT UID:b089d32d-8ed5-44a1-87ce-73ce99df7a8e DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210507Z DESCRIPTION:AGENDA Call to OrderChair's RemarksDepartment Committee Assignm entsAnnouncementsGraduate student award nominations - PevtsovaConsent Agen daDiscussion of bylawsCommittee ReportsReport from the GSRNew BusinessExec utive SessionAdjournmentMINUTESThe regular meeting of the faculty of the D epartment of Mathematics was held in PDL C-38 at 3:30pm PST\, October 7\, 2025. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.Chair's RemarksMax Lieblich welcomed the new faculty\, Acting Assistant Professors Jinwoo Sung and Michele Pernice.We have three faculty who will be speaking at the 2026 International Congress of Mathem aticians: Jarod Alper\, Thomas Rothvoss\, and Cynthia Vinzant.We currently have 35 confirmed grants plus 18 more pending from faculty within the dep artment.I pitched a more ambitious plan with Jane Street Capital for this year and the Hargraves Estate donated $100k to the department.There is a n ew four-year-term faculty fellowship in the works. Details will be made av ailable soon. Our summer research program was very successful. We had a la rge turn out of students and we’ll be building upon this model moving forw ard.Our summer enrollment was also successful. We grossed $200k and antici pate bringing in closer to $300k next summer. This provides the department with a buffer for operating costs independent of the college and external grants. Soumik Pal is very close to submitting our master’s program propo sal. We are in the process of recording content for the courses which can also be used in existing courses.We will be hiring at least two more Actin g Assistant Professors this year. Isabella Novik is chairing the search co mmittee. We also hope to be able to admit around ten graduate students dep ending on the amount of funding made available by the college.Committee as signments are almost ready. The final core committees have yet to be final ized. Once those have been decided we can have a discussion of the departm ent’s bylaws.Following up on this morning’s email about our new shared IT services\, please read it thoroughly and follow the instructions on how to file a ticket for requests.The floor was opened to discuss changing the r egular meeting schedule. AnnouncementsAndrei Okounkov will be visiting the department next week to give the Walker-Ames Scholar Special Lecture alon g with a Math Hour talk and special graduate student colloquium. If you ar e interested in meeting with him please contact Julia Pevtsova or Farbod S hokrieh.The Math AI lab is off to a great start. They have 11 projects\, a round 45 undergraduates\, six or seven PhD students\, three faculty from m ath and one from ECE. They’ve also received $60k in outside funding.Richar d Kenyon will be delivering the Birnbaum Lecture at the Pacific Northwest Probability Seminar on Saturday\, October 18. There is a Y Math talk by Ch inmay Nirkhe this Friday.UW Math graduate students Alexander Wang and Came ron Wright helped mentor 30 students from around the country at the Park C ity Experimental Math Lab this past summer. Previous participants have bee n alums Sam Fairchild\, Albert Artiles\, and Paige Helms. Please send nomi nations for students to the SLMath summer graduate schools to Julia Pevtso va. She will also be collecting nominations for the department’s graduate student awards. Graduate TA award nominations should be directed to Charle s Camacho\, Andy Loveless\, or Elena Pezzoli.This is a reminder that the d epartment has travel funding available for graduate students to apply for but that the first method should be for support through their advisor. In addition\, there is funding via the graduate school. Consent AgendaA conse nt agenda was sent out to faculty in advance of the meeting re: approval o f the previous meeting's minutes\, the department’s retention policy\, and the delegation of authority for temporary appointments. A motion was made to sever the retention policy from the vote. The remaining items were app roved and passed.Report from the GSRZawad Chowdhury and Patrick O'Melveny are this year’s Graduate Student Representatives. The Current Topics semin ar will be rescheduled from the autumn to winter quarter to better align w ith first and second year student schedules. Requests for speakers will be going out via email. There are also several events geared towards graduat ing students providing support for job applications\, etc. in the Career T ransitions talks held every Thursday at 4:30pm.ADJOURNMENTThere being no n ew business\, the meeting passed into executive session at 4:15pm. DTSTART;TZID=America/Los_Angeles:20251007T153000 DTEND;TZID=America/Los_Angeles:20251007T163000 LAST-MODIFIED:20251115T011015Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-07/faculty-meeting END:VEVENT BEGIN:VEVENT UID:ad1ee516-58b1-4b0f-94b6-66f97846b58b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250926T005513Z DESCRIPTION:Speaker: Jan Bohr (Bonn)\n\nAbstract: A unitary connection on t he 2-sphere is called transparent\, if its parallel along all great circle s is the identity. In the scalar case this is equivalent to the connection being odd up to gauge\, but for higher ranks the situation is more intric ate. Mason proposed a classification of transparent connections on the 2-s phere in terms of complex geometric data on \$\mathbb{CP}^2\$. In the talk I will discuss a generalisation of this classification that incorporates unitary pairs (connection + matrix field)\, as well as other closed Rieman nian surfaces. The role of \$\mathbb{CP}^2\$ is then played by transport t wistor space\, a degenerate complex surface tailored to the geodesic flow\ , or (when available) its desingularisation.      DTSTART;TZID=America/Los_Angeles:20251008T150000 DTEND;TZID=America/Los_Angeles:20251008T160000 LAST-MODIFIED:20250926T180922Z LOCATION:DEN 111 SUMMARY:: Twistor correspondence for transparent pairs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-08/twistor-correspondence-tr ansparent-pairs END:VEVENT BEGIN:VEVENT UID:b558d297-ace1-4f0c-ab25-b2a8597f3e02 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250924T213656Z DESCRIPTION:Speaker: Zawad Chowdhury\, University of Washington\n\nAbstract :Graphical designs are subsets of vertices of a graph that perfectly avera ge a selected set of eigenvectors of the Graph Laplacian. We show that in highly-structured graphs\, graphical designs can coincide with highly stru ctured and well-known combinatorial objects: orthogonal arrays in hypercub e graphs\, combinatorial block designs and extremizers of the Erdős-Ko-Rad o theorem in Johnson graphs\, and \$t\$-wise uniform sets of permutations and symmetric subgroups in normal Cayley graphs on the symmetric group. Th ese connections allow tools from spectral graph theory to bear on these co mbinatorial objects.Note: This talk begins with a pre-seminar (aimed at gr aduate students) at 3:30–4:00. The main talk starts at 4:10.The pre-semina r has the following title and abstract:Title: Graphical designs from Gale dualityAbstract: The current state of the art for finding graphical design s of a specific graph is through Gale duality and the theory of polytopes\ , due to work of Catherine Babecki and Rekha Thomas. We will work through a concrete example of this computation. This pre-seminar talk will provide an introduction to graphical designs through a different lens than the on e highlighted in the main talk. Join Zoom Meeting: https://washington.zoom .us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251008T153000 DTEND;TZID=America/Los_Angeles:20251008T170000 LAST-MODIFIED:20250926T192009Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Graphical designs find combinatorial structures TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-08/graphical-designs-find-co mbinatorial-structures END:VEVENT BEGIN:VEVENT UID:52d5e6fe-b7ec-4fd2-8647-aba77ff674b1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250916T225034Z DESCRIPTION:Speaker: Tuoc Phan\, UT Knoxville\n\nWe discuss a class of line ar parabolic equations in non-divergence form in which the leading coeffic ients are measurable\, and they can be singular or degenerate through a we ight belonging to a class of Muckenhoupt weights. Krylov-Safonov Harnack i nequality for solutions is proved under some smallness assumption on a wei ghted mean oscillation of the weight.  To prove the results\, we introduce a class of weighted parabolic cylinders\, through which several growth le mmas are established. Additionally\, a perturbation method is used and the parabolic Aleksandrov-Bakelman-Pucci type maximum principle is applied to suitable barrier functions. As corollaries\, Holder regularity estimates of solutions with respect to a quasi-distance\, and a Liouville type theor em are obtained in the paper.  The talk is based on the paper arXiv:2409.0 9437\, which is the joint work with S. Cho (Gwangju National University of Education) and my graduate student J. Fang. DTSTART;TZID=America/Los_Angeles:20251008T163000 DTEND;TZID=America/Los_Angeles:20251008T173000 LAST-MODIFIED:20250925T185928Z LOCATION:PDL C-038 SUMMARY:: On Harnack inequality for singular or degenerate parabolic equati ons in non divergence form TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-08/harnack-inequality-singul ar-or-degenerate-parabolic-equations-non-divergence-form END:VEVENT BEGIN:VEVENT UID:fd3cd9d3-9cdd-4054-9fe6-ec3a1bffdfc8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251006T044344Z DESCRIPTION:Speaker: Ting Gong\, UW\n\nGrothendieck ring of varieties/stack s has received a lot of attention recently for its applications in rationa lity. In this talk\, we are going to introduce the audience to the study o f the Grothendieck ring of varieties and it connection to rationality. Fin ally\, if time allows\, we present a few results on rationality of motivic zeta function.  DTSTART;TZID=America/Los_Angeles:20251009T150000 DTEND;TZID=America/Los_Angeles:20251009T160000 LAST-MODIFIED:20251006T044352Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Grothendieck ring motivic classes and zeta fun ctions TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-09/student-ag-seminar-grothe ndieck-ring-motivic-classes-and-zeta-functions END:VEVENT BEGIN:VEVENT UID:256db701-f5b2-4e71-93f4-061e1c7c6e2c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T224414Z DTSTART;TZID=America/Los_Angeles:20251009T163000 DTEND;TZID=America/Los_Angeles:20251009T173000 LAST-MODIFIED:20251007T224603Z LOCATION:PDL C-38 SUMMARY:: Application drafting Q amp A TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-09/application-drafting-q-am p END:VEVENT BEGIN:VEVENT UID:e197d96f-f948-4f8b-994e-0abd0a2e7551 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251006T203941Z DESCRIPTION:Speaker: Jay Reiter\, UW\n\nTo a stable infinity category C equ ipped with a well-behaved homology functor to an abelian category A\, Patc hkoria--Pstrągowski associate a derived category which\, in a precise sens e\, interpolates between objects in C and Adams spectral sequences in A ab utting to them. In this talk\, we will begin by showing how this derived c ategory arises naturally when trying to categorify Adams resolutions of sp ectra and then take a close look at its construction which axiomatizes the deformation-theoretic ideas of synthetic spectra. As applications\, we wi ll catch a glimpse of a few very strong algebraicity results--that is\, re sults identifying stable infinity categories of interest with the derived categories of certain abelian categories. DTSTART;TZID=America/Los_Angeles:20251010T133000 DTEND;TZID=America/Los_Angeles:20251010T143000 LAST-MODIFIED:20251023T185225Z LOCATION:THO 325 SUMMARY:: DubTop Seminar Deformations of stable infinity categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-10/dubtop-seminar-deformatio ns-stable-infinity-categories END:VEVENT BEGIN:VEVENT UID:a07f10cb-07ce-4f0c-a9cd-79a31ce81b15 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T061113Z DESCRIPTION:Speaker: Grace O'Brien\, University of Washington\n\nHave you h eard the words 'neural networks' but not totally understood what they are? Are you interested in hearing about my experience interning at PNNL? Do y ou like pretty pictures? Come to my talk and get an introduction to machin e learning and the math behind it. I'll also discuss my specific project t his summer\, described below.AI systems are increasingly becoming a part o f our everyday lives\, including in safety-critical systems. However\, the innerworkings of deep neural networks are still largely a black box. Even in the case of classification tasks\, common methods used to assess model performance do not give insight into whether the model will generalize or into other performance nuances. In this project\, we use mathematical tec hniques to better understand how these processes work and explore how to i dentify problems such as overfitting\, memorization\, and poor generalizat ion.  In the process of training a model\, piecewise-linear activation fun ctions partition the input space into two\, creating a tiling that shifts over time. Following the work of Balestriero\, Baraniuk\, and others\, we use geometric tools to study this tiling to gain insight into the model’s training progress and\, potentially provide greater assurances that a mode l is ready for deployment.  DTSTART;TZID=America/Los_Angeles:20251010T143000 DTEND;TZID=America/Los_Angeles:20251010T153000 LAST-MODIFIED:20251009T002141Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar Spline time Using geometry to understand d eep neural networks TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-10/back-school-seminar-splin e-time-using-geometry-understand-deep-neural-networks END:VEVENT BEGIN:VEVENT UID:4b1002ef-70f4-48d2-92ab-d8f299be914c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250811T171917Z DESCRIPTION:Speaker: Chinmay Nirkhe\, CSE\, UW\n\nIn this talk\, I will des cribe the mathematics behind proving lower bounds on quantum circuit depth using light-cone arguments. These arguments have been used to prove lower bounds on the complexities of physically relevant ground states. No quant um computation background is assumed\, but a familiarity with linear algeb ra will be helpful.The talk will be followed by an informal Q&A session wi th food and beverages. DTSTART;TZID=America/Los_Angeles:20251010T153000 DTEND;TZID=America/Los_Angeles:20251010T163000 LAST-MODIFIED:20260226T181453Z LOCATION:ECE 105 SUMMARY:: Complexity of quantum states TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-10/complexity-quantum-states END:VEVENT BEGIN:VEVENT UID:05fc0465-346e-4147-a7a9-c105548773fa DTSTAMP:20260617T145208Z CATEGORIES:Student Activities\, Workshops CLASS:PUBLIC CREATED:20250910T000334Z DESCRIPTION:Speaker: Andrei Okounkov\, Columbia University\, 2025 Walker Am es scholar\n\nWhat does it mean to be rational or irrational and why some problems have rational solutions while others don’t? DTSTART;TZID=America/Los_Angeles:20251012T130000 DTEND;TZID=America/Los_Angeles:20251012T140000 LAST-MODIFIED:20260121T212915Z LOCATION:MGH 389 SUMMARY:: Rational and Irrational TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-12/rational-and-irrational END:VEVENT BEGIN:VEVENT UID:fa764240-d509-4828-a363-80ad55e0ba8f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251009T193453Z DESCRIPTION:Speaker: Charlie Magland\n\nTitle: What is a Reductive Group? A World Record Attempt!Abstract: I will be the first to attempt the challen ge posed by Justin Bloom on September 22nd\, 2025. Along the way we will l earn what a reductive group is\, some examples\, and why we care about the m. DTSTART;TZID=America/Los_Angeles:20251013T113000 DTEND;TZID=America/Los_Angeles:20251013T123000 LAST-MODIFIED:20251009T193453Z LOCATION:SIG 228 SUMMARY:: What is a Reductive Group A World Record Attempt TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-13/what-reductive-group-worl d-record-attempt END:VEVENT BEGIN:VEVENT UID:9cc7fef9-d0e2-4b8e-90fc-4e34e27adf18 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T234858Z DESCRIPTION:Speaker: Jinwoo Sung\, University of Washington\n\nAbstract: Li ouville quantum gravity (LQG) is a one-parameter model of surfaces with ra ndom geometry. The parameter\, called the central charge c\, controls how fractal the LQG surface is. Whereas the subcritical and critical phases of LQG\, corresponding to c≥25\, has been investigated extensively in recent years\, most of the available tools (Gaussian multiplicative chaos\, mati ng of trees\, etc) do not extend to the supercritical phase c∈(1\,25). In this talk\, I will present a random planar map model of supercritical LQG\ , based on the coupling with CLE(4) by Ang and Gwynne\, and consider its p ossible scaling limits. A priori\, it can have infinitely many vertices wi th positive probability\; conditioning on the event that this model is fin ite\, we obtain the continuum random tree as the scaling limit as predicte d in some of the physics literature. Without this conditioning\, we expect it to have a different scaling limit described by the Gaussian free field (GFF). To this end\, we formulate a precise scaling limit conjecture for the Tutte embedding of this model\, defined using a novel construction of random walks on graphs reflected off of its infinite ends. This is joint w ork with Manan Bhatia (MIT) and Ewain Gwynne (UChicago). DTSTART;TZID=America/Los_Angeles:20251013T143000 DTEND;TZID=America/Los_Angeles:20251013T153000 LAST-MODIFIED:20251007T234858Z LOCATION:LOW 101 SUMMARY:: Perspectives on discrete models of supercritical Liouville quantu m gravity TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-13/perspectives-discrete-mod els-supercritical-liouville-quantum-gravity END:VEVENT BEGIN:VEVENT UID:a15d3350-2013-4e64-8107-a9b7ec23bcfd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251010T213155Z DESCRIPTION:Speaker: Jennifer Li (Princeton)\n\nPretalk title: An introduct ion to weighted projective spacesAbstract: The focus of today's main talk involves certain surfaces in weighted projective space. This space is defi ned similarly to the usual projective space\, except now we may attach non trivial weights to the coordinates. In this pretalk\, I will introduce wei ghted projective spaces\, explain some of its interesting properties\, and provide many examples. Talk title: Weighted surfaces with maximal Picard numberAbstract: An algorithm due to Shioda computes the Picard number for certain surfaces which are defined by a single equation with exactly four monomials\, called Delsarte surfaces. We consider this method for surfaces in weighted projective 3-space with quotient singularities. In this talk\ , I will explain a criterion for such a weighted Delsarte surface X to hav e maximal Picard number. This condition is surprisingly related to the aut omorphism group of X. This is joint work with Louis Esser. DTSTART;TZID=America/Los_Angeles:20251014T134500 DTEND;TZID=America/Los_Angeles:20251014T153000 LAST-MODIFIED:20251010T213155Z LOCATION:PDL C-38 SUMMARY:: Weighted surfaces with maximal Picard number TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-14/weighted-surfaces-maximal -picard-number END:VEVENT BEGIN:VEVENT UID:aa628a00-9015-40ee-a4de-d020a7ed7065 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250926T005555Z DESCRIPTION:Speaker: Krutika Tawri (UW)\n\nIn this talk we will discuss rec ent results concerning stochastic (and deterministic) free boundary proble ms\, particularly arising in fluid structure interaction (FSI). We will be gin by considering a nonlinearly coupled FSI system perturbed by stochasti c effects involving a viscous fluid modeled by the Navier-Stokes equations in a 2D/3D domain\, where part of the fluid domain boundary consists of a n elastic deformable structure modeled by plate equations. The fluid and t he structure are coupled via two sets of coupling conditions (balance of s tress and kinematic entities) imposed at the fluid-structure interface. We will present results for both incompressible and compressible fluid flows . We will also discuss various kinematic coupling conditions and their imp lications for degeneracies in the problem. Finally\, we will discuss long- time behavior of the solutions to a reduced stochastic FSI model obtained by spatially averaging a component of the fluid velocity in long compliant tubes. DTSTART;TZID=America/Los_Angeles:20251015T150000 DTEND;TZID=America/Los_Angeles:20251015T160000 LAST-MODIFIED:20251007T015133Z LOCATION:DEN 111 SUMMARY:: On stochastic partial differential equations arising in fluid str ucture interaction TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-15/stochastic-partial-differ ential-equations-arising-fluid-structure-interaction END:VEVENT BEGIN:VEVENT UID:fe569c7d-4468-46f8-b0c3-5f1145a8095e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250924T214957Z DESCRIPTION:Speaker: Grant Barkley\, University of Michigan\n\nAbstract:Let \$u\$ and \$v\$ be two permutations of the numbers \$1\,\ldots\,n\$. Asso ciated to \$u\$ and \$v\$ is a polynomial \$P_{uv}\$\, called the Kazhdan- Lusztig polynomial\, which encodes numerical invariants that are central i n geometric representation theory. The coefficients of \$P_{uv}\$ simultan eously describe the singularities of Schubert varieties\, the structure of Hecke algebras\, and the representation theory of Lie algebras. Associate d to \$u\$ and \$v\$ is another object\, the Bruhat graph of \$(u\,v)\$\, which is a directed graph describing the transpositions taking \$u\$ to \$ v\$. The combinatorial invariance conjecture (CIC) of Dyer and Lusztig ass erts that the Bruhat graph of \$(u\,v)\$ uniquely determines \$P_{uv}\$. R ecently\, Geordie Williamson and Google DeepMind applied machine learning techniques to this problem. Using those techniques\, they conjectured an e xplicit recursion that would compute \$P_{uv}\$ from the Bruhat graph and thereby prove the CIC. In joint work with Christian Gaetz\, we prove the W illiamson-DeepMind conjecture in the case where \$u\$ is the identity perm utation. Along the way\, we prove two new identities for the Kazhdan--Lusz tig \$R\$ polynomials\, one of which implies new cases of the CIC.Note: Th e main talk will begin at 3:30. There is no pre-seminar.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251015T153000 DTEND;TZID=America/Los_Angeles:20251015T163000 LAST-MODIFIED:20251013T065312Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: The combinatorial invariance conjecture TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-15/combinatorial-invariance- conjecture END:VEVENT BEGIN:VEVENT UID:785357c0-99cc-46b9-804c-fb1819339489 DTSTAMP:20260617T145208Z CATEGORIES:Special Events CLASS:PUBLIC CREATED:20250916T004145Z DESCRIPTION:Speaker: Andrei Okounkov\, Samuel Eilenberg Professor of Mathem atics at Columbia University\n\nMathematics has its own language\, which i s used by all other sciences to describe our world. It is very important t o use it correctly\, and to appreciate how it changes with time. This impo rtance is growing rapidly with the ever wider use of large language models . There is great potential here\, but also many pitfalls\, as we will disc uss in this lecture.This talk will be geared towards a general audience.\n \n \n \n \n\n \n\n\n \nAndrei Okounkov is current ly the Samuel Eilenberg Professor of Mathematics at Columbia University. H is work has revealed profound new connections between different areas of m athematics and has brought new insights into problems arising in physics. Although his work is difficult to classify because it touches on such a va riety of areas\, two clear themes are the use of notions of randomness and of classical ideas from representation theory. This combination has prove n powerful in attacking problems from algebraic geometry and statistical m echanics.In 2004\, Okounkov received the European Mathematical Society Pri ze for work that “contributed greatly to the field of asymptotic combinato rics.” In 2006\, he was awarded a Fields Medal\, often described as the No bel Prize for math\, “for his contributions bridging probability\, represe ntation theory and algebraic geometry”\, his work having revealed “profoun d new connections between different areas of mathematics.” He became a fel low of the American Academy of Arts and Sciences in 2016. DTSTART;TZID=America/Los_Angeles:20251015T170000 DTEND;TZID=America/Los_Angeles:20251015T180000 LAST-MODIFIED:20251017T013231Z LOCATION:KNE 210 SUMMARY:: Walker Ames Scholar Special Lecture The Language of Mathematics TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-15/walker-ames-scholar-speci al-lecture-language-mathematics END:VEVENT BEGIN:VEVENT UID:de06a0af-7da2-4cf2-bc5a-6949032e9f48 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T003812Z DESCRIPTION:Speaker: Andrei Okounkov\, Columbia\n\nThis will be an introduc tory talk explaining what a quantum group is and how quantum groups can be used to answer enumerative geometry questions. DTSTART;TZID=America/Los_Angeles:20251016T150000 DTEND;TZID=America/Los_Angeles:20251016T160000 LAST-MODIFIED:20251007T224047Z LOCATION:MLR 301 SUMMARY:: Special Graduate Colloquium Quantum groups and enumerative geomet ry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-16/special-graduate-colloqui um-quantum-groups-and-enumerative-geometry END:VEVENT BEGIN:VEVENT UID:de343834-2474-4f99-953d-466925ccc31a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T224627Z DESCRIPTION:Speaker: Vasily Ilin\, Leo Mayer\, Clare Minnerath \, Grace O'Brien\, Andrew Tawfeek\n\nThis event features panelists who either rece ntly did internships\, have enrolled in a workshop with the Erdős Institut e\, or participated in some organized workshops outside of the typical  su mmer opportunities. They will share their experience about the work and th e application process. If you are considering applying for internships thi s summer\, this will be a great time to ask questions\, formulate your goa ls for next summer\, create a plan of action to achieve those goals\, and  encourage one another along the way.   DTSTART;TZID=America/Los_Angeles:20251016T163000 DTEND;TZID=America/Los_Angeles:20251016T173000 LAST-MODIFIED:20251014T182256Z LOCATION:PDL C-38 SUMMARY:: Internships and Erdos Institute Panel TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-16/internships-and-erdos-ins titute-panel END:VEVENT BEGIN:VEVENT UID:53848c24-dc5b-4e08-9a7f-af4206e70445 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20251013T154535Z DESCRIPTION:Speaker: Vasily Ilin\n\nSeed-Prover is the current best Lean mo del\, achieving 100% on minif2f\, 50% on PutnamBench and gold-level perfor mance on the 2025 IMO. I will briefly survey the history of formal theorem proving and talk about the Seed-Prover paper. You do not need to know Lea n to understand the talk.Zoom: https://washington.zoom.us/j/93878164589?pw d=JMgKEqmkweRU91rO7COjG8rknh… DTSTART;TZID=America/Los_Angeles:20251017T123000 DTEND;TZID=America/Los_Angeles:20251017T133000 LAST-MODIFIED:20260203T003500Z LOCATION:PDL-C38\, Zoom: https://washington.zoom.us/j/93878164589?pwd=JMgKE qmkweRU91rO7COjG8rknhjsuE.1 SUMMARY:: Seed Prover Deep and Broad Reasoning for Automated Theorem Provin g TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-17/seed-prover-deep-and-broa d-reasoning-automated-theorem-proving END:VEVENT BEGIN:VEVENT UID:e124b9a9-b6a9-4c1e-b7fc-4ad4947038b7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251015T174808Z DESCRIPTION:Speaker: Albert Yang\, University of Pennsylvania\n\nThe integr al Hodge conjecture was famously disproved by Atiyah and Hirzebruch\, who found a counterexample in the cohomology of the classifying space of a cer tain finite group. Following a question proposed by Totaro in his 2014 boo k\, it is natural to ask whether analogous phenomena occur in the motivic setting. In this talk\, I will study motivic classifying spaces in richer motivic cohomology theories\, including algebraic K-theory and hermitian K -theory. This is joint work with Prerna Dhankhar\, Rebecca Field\, Arjun N igam\, and J.D. Quigley. DTSTART;TZID=America/Los_Angeles:20251017T133000 DTEND;TZID=America/Los_Angeles:20251017T143000 LAST-MODIFIED:20251015T174808Z LOCATION:THO 325 SUMMARY:: DubTop Seminar Motivic classifying spaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-17/dubtop-seminar-motivic-cl assifying-spaces END:VEVENT BEGIN:VEVENT UID:083381a7-4c5f-42f4-98f7-81740dcaeb32 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251014T185653Z DESCRIPTION:Speaker: Clare Minnerath\, University of Washington\n\nThe stud y of \$SL_r(\mathbb{C})\$ tensor invariants has been extended by the addit ion of tensor diagrams. The search for a basis among webs\, the planar ver sion of tensor diagrams\, has yielded compelling results for \$r=2\$ and \ $3\$\, but has proven elusive for larger \$r\$. In an example forward fash ion\, we will see how you can go from a tensor diagram to an element of th e invariant ring\, explore the known web bases for \$SL_2\$ and \$SL_3\$ i nvariants\, and discuss what properties we hope for in a web basis when \$ r\ge 4\$.Based on lectures given by Christian Gaetz at SLMath: Graphical M odels in Algebraic Combinatorics. DTSTART;TZID=America/Los_Angeles:20251017T143000 DTEND;TZID=America/Los_Angeles:20251017T153000 LAST-MODIFIED:20251014T190958Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar The search for Web bases for SL r C invari ants TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-17/back-school-seminar-searc h-web-bases-sl-r-c-invariants END:VEVENT BEGIN:VEVENT UID:1d08b9ec-e6b7-4eae-b024-969076452b8f DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20250805T164343Z DESCRIPTION:Speaker: Kavita Ramanan\, Brown University\n\nThere are many sy nergies between probability theory and convex geometry\, especially in hig h-dimensional settings. We discuss some classical examples and then focus on a recent development concerning a famous theorem of von Neumann\, which establishes a one-to-one correspondence between unitarily invariant norms on nxn matrices and the class of 1-symmetric norms on Rn. We describe a m easure theoretic version of this theorem for the uniform distribution on p -Schatten balls\, and some ramifications. A key ingredient of the proof is the identification of a certain Rademacher phase of the unitary group\, w hich may be of independent interest.  This is based on joint work with Gri goris Paouris.Minimal prior knowledge will be assumed: all terms in the ti tle\, abstract and beyond will be defined in the talk. The hope is to make much of the lecture accessible to a broad audience\, including graduate s tudents. DTSTART;TZID=America/Los_Angeles:20251017T153000 DTEND;TZID=America/Los_Angeles:20251017T163000 LAST-MODIFIED:20251010T170225Z LOCATION:ECE 105 SUMMARY:: Towards a measure theoretic von Neumann theorem TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-17/towards-measure-theoretic -von-neumann-theorem END:VEVENT BEGIN:VEVENT UID:4f27fea9-c37e-4409-9575-50e60927ef0e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251013T175621Z DESCRIPTION:Speaker: Ting Gong\n\nTitle: What's the problem with taking quo tients? Abstract: As we have noted earlier in this seminar\, taking quotie nts can be quite painstaking. There is no guarantee that the naive functor G/H gives a group scheme\, and there is even no information on whether th e universal property guarantees the existence of group schemes. What do we need to make this work? In this talk\, we are going to briefly include Gr othendieck topologies and conditions for making quotients work nicely\, so that we can put our hearts back to our chest.  DTSTART;TZID=America/Los_Angeles:20251020T113000 DTEND;TZID=America/Los_Angeles:20251020T123000 LAST-MODIFIED:20251014T230305Z LOCATION:SIG 228 SUMMARY:: What s the problem with taking quotients TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-20/what-s-problem-taking-quo tients END:VEVENT BEGIN:VEVENT UID:a813d886-7f84-4088-8a1d-5a35e5e209d9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251016T211404Z DESCRIPTION:Speaker: Bianca Viray\, University of Washington\n\nFor geometr ically rational surfaces\, determining their rationality over a nonclosed field reduces to a question about the Galois action on the finite collecti on of curves that generate the Picard group.  For geometrically rational t hreefolds\, however\, the question becomes much more complicated and many aspects remain open. In this talk\, we consider the rationality question f or certain conic bundle threefolds.  In this case\, we show that the so-ca lled intermediate Jacobian torsor (IJT) rationality obstruction of Hassett --Tschinkel and Benoist--Wittenberg can be framed in terms of arithmetical ly interesting torsors under a Prym variety.  Using the structure of these torsors we show that the IJT obstruction characterizes rationality for th ese conic bundles over fields with trivial 2-torsion in the Brauer group\, but that it is not strong enough to characterize rationality over arbitra ry fields. This is joint work with S. Frei\, L. Ji\, S. Sankar\, and I. Vo gt. DTSTART;TZID=America/Los_Angeles:20251021T110000 DTEND;TZID=America/Los_Angeles:20251021T115000 LAST-MODIFIED:20251016T211428Z LOCATION:PDL C-401 SUMMARY:: Torsors under Prym varieties conic bundles threefolds and their c onnection to rationality TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-21/torsors-under-prym-variet ies-conic-bundles-threefolds-and-their-connection END:VEVENT BEGIN:VEVENT UID:dbabd979-103d-4881-a493-2525b8301b17 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251020T194456Z DESCRIPTION:Speaker: Bryan Lu\, UW\n\nRichard Stanley's resolution of McMul len's g-conjecture in the 1970s using the cohomology of toric varieties sp arked the use of toric geometry in geometric combinatorics. Since then\, c ombinatorialists have looked to toric varieties and toric ideals as a sour ce of questions and techniques for reasoning about polytopes. We take the former point of view and describe the correspondence between this large cl ass of (normal\, complex) varieties and the combinatorial data of polytope s. In particular\, we discuss how the combinatorics of polytopes and polyt opal fans not only characterizes all toric varieties\, but also encodes a wealth of intrinsic geometric information about the variety itself. Time-p ermitting\, we discuss some of the aforementioned combinatorial applicatio ns of toric geometry (and adjacent ideas).(Based on Toric Varieties by Cox \, Little\, and Schenck.)  DTSTART;TZID=America/Los_Angeles:20251023T150000 DTEND;TZID=America/Los_Angeles:20251023T160000 LAST-MODIFIED:20251020T194513Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Making Toric Varieties Count TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-23/student-ag-seminar-making -toric-varieties-count END:VEVENT BEGIN:VEVENT UID:3a2196cd-96ff-48b5-ae50-8bae5f6b4555 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T224904Z DESCRIPTION:Speaker: Charles Camacho\, Catherine Hsu\, Kevin Liu\, Jessie L oucks-Tavitas\, Andy Loveless\, Steve Klee\, Jonah Ostroff\n\nHear from fa culty with teaching-focused positions on how to apply to teaching or liber al arts positions. While the panel is focused on applications and thus mos t useful to graduating students\, all students are encouraged to come and learn about this important facet of academia. Come with questions! DTSTART;TZID=America/Los_Angeles:20251023T163000 DTEND;TZID=America/Los_Angeles:20251023T173000 LAST-MODIFIED:20251017T192750Z LOCATION:PDL C-38 SUMMARY:: Teaching and Liberal Arts Position Applications Panel TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-23/teaching-and-liberal-arts -position-applications-panel END:VEVENT BEGIN:VEVENT UID:66ac91d8-06a5-4afd-84d1-1356f42dee03 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251013T164144Z DESCRIPTION:Speaker: Alexander Chervov\, Institut Curie\n\nWe will present an AI-based open source Python library 'CayleyPy' which can handle googol- size Cayley graphs and significantly outperforms classical computer algebr a systems GAP/SAGE for several tasks. Hundreds conjectures and several res ults were obtained with its help. Classical group theory tasks e.g. decomp osition of the group elements\, can be rephrased as standard reinforcement learning tasks\, and approached in a similar manner as Google Deepmind's AlphaGo/Zero. We will also give an overview of various recent achievements in 'AI for math' emerging field of research. The talk will be based on:   arXiv:2509.19162\,  arXiv:2502.18663\,  arXiv:2502.13266. Zoom: https://wa shington.zoom.us/j/93878164589?pwd=JMgKEqmkweRU91rO7COjG8rknh… DTSTART;TZID=America/Los_Angeles:20251024T123000 DTEND;TZID=America/Los_Angeles:20251024T133000 LAST-MODIFIED:20260121T212341Z LOCATION:PDL-C38 and Zoom https://washington.zoom.us/j/93878164589?pwd=JMgK EqmkweRU91rO7COjG8rknhjsuE.1 SUMMARY:: CayleyPy Artificial intelligence methods for group and graph theo ries TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-24/cayleypy-artificial-intel ligence-methods-group-and-graph-theories END:VEVENT BEGIN:VEVENT UID:171b0e7c-07c2-4f38-be76-68245b39f064 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions\, Student Activities\, Workshops CLASS:PUBLIC CREATED:20251017T143936Z DESCRIPTION:Speaker: Vasily Ilin\n\nIf you have been curious about Lean -- the programming language to teach math to a computer -- but did not know h ow to get started\, come Lean with us! The Math AI Lab (ai.math.uw.edu) is organizing this event to bring Lean beginners together\, including level 0\, to quote Panda Po. This is also a good way to engage with the UW Math AI Lab in order to participate in future research projects. I will give a small demo that you will follow on your laptop right in the browser. We wi ll probably start with the Natural Number Game and proceed to Glimpse of L ean. DTSTART;TZID=America/Los_Angeles:20251024T133000 DTEND;TZID=America/Los_Angeles:20251024T153000 LAST-MODIFIED:20260121T212751Z LOCATION:CMU 243 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-24/lean-together END:VEVENT BEGIN:VEVENT UID:a62e2f6b-cb6d-4c5e-9aae-d08fb9fe6044 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251023T233323Z DESCRIPTION:Speaker: Ethan MacBrough\, University of Washington\n\nAlgebrai c geometers have developed several notions of 'nice singularity' which are useful in applications\; typically these nice singularities are chosen to balance flexibility (interesting geometric constructions you might want t o perform will often lead to singularities) and tame behavior (any interes ting geometric conclusions you might want to draw will be screwed up by su fficiently bad singularities). A third desirable feature is ease of determ ining whether or not a given singularity is nice\; unfortunately\, this th ird property often gets kicked to the road in favor of optimizing the abov e dichotomy. Aside from the psychological distress this may cause\, this b ecomes seriously problematic when you're trying to 'run experiments' (i.e. construct interesting examples) to analyze the subtle behavior of these s ingularities. Thankfully\, there are several tricks which are generally ef fective for analyzing the singularity type when you have explicit equation s. In this talk I will go through a few examples showing some of these tec hniques in action. Most of the talk will have no real prerequisites as lon g as you're willing to black box some details\, but in the later part I as sume familiarity with basic homological algebra. DTSTART;TZID=America/Los_Angeles:20251024T143000 DTEND;TZID=America/Los_Angeles:20251024T153000 LAST-MODIFIED:20251023T233323Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar Working with singularities explicitly TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-24/back-school-seminar-worki ng-singularities-explicitly END:VEVENT BEGIN:VEVENT UID:101a6465-92d3-49e7-af47-dd78f9c4a7f8 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20250805T165213Z DESCRIPTION:Speaker: Laurent Saloff-Coste\, Cornell University\n\nRandom wa lks  or diffusions with Dirichlet boundary condition (killing at the bound ary) admit a Perron-Frobenius eigenfunction (the unique positive normalize d eigenfunction when the domain is  bounded).  Starting with gambler's rui n problems\, we discuss the  key role of  this  eigenfunction and the chal lenges that arise to understand its shape. DTSTART;TZID=America/Los_Angeles:20251024T153000 DTEND;TZID=America/Los_Angeles:20251024T163000 LAST-MODIFIED:20251006T203640Z LOCATION:ECE 105 SUMMARY:: The geometry of the Perron Frobenius eigenfunction TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-24/geometry-perron-frobenius -eigenfunction END:VEVENT BEGIN:VEVENT UID:a2818850-bf5e-4c75-b53e-297887858cb6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251013T180256Z DESCRIPTION:Speaker: Monty McGovern\n\nTitle:  Introduction to the flag var ietyAbstract:  Following Fulton's treatment in his book Young Tableaux\, I will define the flag variety F_n (for the general linear group GL_n) and give explicit defining equations for it.  Using Young tableaux\, I will sh ow how these relations lead naturally to a realization of all finite-dimen sional polynomial representations of this group\, showing how these appear in the coordinate ring of F_n.  I will also briefly indicate how the equa tions generalize to other classical (i.e.\, symplectic and orthogonal) gro ups. DTSTART;TZID=America/Los_Angeles:20251027T113000 DTEND;TZID=America/Los_Angeles:20251027T123000 LAST-MODIFIED:20251013T180256Z LOCATION:SIG 228 SUMMARY:: Introduction to the flag variety TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-27/introduction-flag-variety END:VEVENT BEGIN:VEVENT UID:73d7930f-6f49-462a-ac87-5edd7c3d5b83 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251014T200702Z DESCRIPTION:Speaker: Benjamin H. Feintzeig\, University of Washington\, Sea ttle \n\nA recently proposed stochastic hidden variable model for quantum mechanics has been claimed to involve 'retrocausality' due to the appearan ce of equations of motion with future-time boundary conditions. We formula te an equivalent system of forward-time equations of motion that gives ris e to the same trajectories as solutions\, but involves only initial-time b oundary conditions. The forward-time dynamics involves a guidance term for the dynamical variables\, determined by the phase-space distribution corr esponding to a quantum wave function. We show\, however\, that this partic ular guidance term can be recovered as the mean-field limit of averaged pa irwise interactions among an ensemble of finitely many particles.   The re sults establish a general trade-off in stochastic models for quantum mecha nics between reverse-time and guiding wave formulations.  DTSTART;TZID=America/Los_Angeles:20251027T143000 DTEND;TZID=America/Los_Angeles:20251027T153000 LAST-MODIFIED:20251014T200702Z LOCATION:LOW 101 SUMMARY:: Forward Time Equivalent of a Retrocausal Diffusion Hidden Variabl e Model for Quantum Mechanics TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-27/forward-time-equivalent-r etrocausal-diffusion-hidden-variable-model-quantum END:VEVENT BEGIN:VEVENT UID:3542ebe7-de96-43f0-8672-8ea71486c991 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251021T060914Z DESCRIPTION:Speaker: Benjamin Feintzeig\, UW\n\nA recently proposed stochas tic hidden variable model for quantum mechanics has been claimed to involv e 'retrocausality' due to the appearance of equations of motion with futur e-time boundary conditions. We formulate an equivalent system of forward-t ime equations of motion that gives rise to the same trajectories as soluti ons\, but involves only initial-time boundary conditions. The forward-time dynamics involves a guidance term for the dynamical variables\, determine d by the phase-space distribution corresponding to a quantum wavefunction. We show\, however\, that this particular guidance term can be recovered a s the mean-field limit of averaged pairwise interactions among an ensemble of finitely many particles.   The results establish a general trade-off i n stochastic models for quantum mechanics between reverse-time and guiding wave formulations.  DTSTART;TZID=America/Los_Angeles:20251027T143000 DTEND;TZID=America/Los_Angeles:20251027T153000 LAST-MODIFIED:20251021T060914Z LOCATION:LOW 101 SUMMARY:: Forward Time Equivalent of a Retrocausal Diffusion Hidden Variabl e Model for Quantum Mechanics TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-27/forward-time-equivalent-r etrocausal-diffusion-hidden-variable-model-quantum-0 END:VEVENT BEGIN:VEVENT UID:bdd92118-07fe-483d-bbbc-632e45ef9a40 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251016T191137Z DESCRIPTION:Speaker: Daigo Ito (Berkeley)\n\nTitle pretalk: Reconstruction and birational geometry in the Matsui spectrum of derived categoriesAbstra ct pretalk: The bounded derived category of coherent sheaves captures vari ous properties of smooth projective varieties. One of the most important r esults is the Bondal--Orlov reconstruction theorem\, which states that if the (anti-)canonical bundle is ample\, then the variety can be reconstruct ed from its derived category. In this talk\, I will introduce a new and co nceptually straightforward proof using the Matsui spectrum\, a locally rin ged space constructed from the derived category in the spirit of tensor tr iangular geometry. I will then explain how this perspective naturally lead s to considering tensor-ample line bundles and extends to capture biration al geometric phenomena. Ttitle: A derived category analogue of the Nakai-- Moishezon criterionAbstract: In the study of derived categories of coheren t sheaves\, ample line bundles play a fundamental role\; their tensor powe rs generate the derived category. This raises a natural question: does thi s generation property characterize ampleness? The answer is negative\, but we show that this categorical property\, tensor-ampleness\, admits a clas sical numerical criterion naturally extending the Nakai–Moishezon criterio n. Moreover\, the cone of tensor-ample divisors lies between the big cone and the ample cone. In this talk I will focus on explaining the case of su rfaces\, where the geometry becomes especially clear. This is a joint work with Noah Olander. DTSTART;TZID=America/Los_Angeles:20251028T134500 DTEND;TZID=America/Los_Angeles:20251028T153000 LAST-MODIFIED:20251016T191137Z LOCATION:PDL C-38 SUMMARY:: A derived category analogue of the Nakai Moishezon criterion TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-28/derived-category-analogue -nakai-moishezon-criterion END:VEVENT BEGIN:VEVENT UID:481acf54-dff3-4867-a30f-cdca6b507f6d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250926T005638Z DESCRIPTION:Speaker: Nicholas Marshall (Oregon State)\n\nWe consider a regi on in the complex plane enclosed by a deltoid curve inscribed in the unit circle\, and define a family of polynomials that satisfy the same recurren ce relation as the Faber polynomials for this region. We use this family o f polynomials to give a constructive proof that z^n is approximately a pol ynomial of degree ~sqrt(n) within the deltoid region. Moreover\, we show t hat this family of polynomials is bounded in this deltoid region and has a useful rapid growth property.  We illustrate our polynomial approximation theory with an application to iterative linear algebra\, and discuss gene ralizations of the presented framework. (This talk is based on joint work with Peter Cowal and Sara Pollock) DTSTART;TZID=America/Los_Angeles:20251029T150000 DTEND;TZID=America/Los_Angeles:20251029T160000 LAST-MODIFIED:20251014T231410Z LOCATION:DEN 111 SUMMARY:: Faber Polynomials in a Deltoid Region Power Iteration with Moment um and Beyond TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-29/faber-polynomials-deltoid -region-power-iteration-momentum-and-beyond END:VEVENT BEGIN:VEVENT UID:fbb657cf-c0c3-4a4a-9903-afc51c0277b6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251017T041633Z DESCRIPTION:Speaker: Jayadev Athreya\, University of Washington\n\nAbstract :We compute the complexity of the billiard language of the regular Euclide an N-gons (and other families of rational lattice polygons)\, answering a question posed by Cassaigne-Hubert-Troubetzkoy. Our key technical result i s a counting result for saddle connections on lattice surfaces\, when we c ount by combinatorial length. No prior knowledge of geometry of surfaces w ill be assumed. This is joint work with Pascal Hubert and Serge Troubetzko y.Note: There is no pre-seminar. The main talk starts at 4:10.Join Zoom Me eting: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251029T153000 DTEND;TZID=America/Los_Angeles:20251029T170000 LAST-MODIFIED:20251017T041836Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Complexity for billiards in regular N gons TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-29/complexity-billiards-regu lar-n-gons END:VEVENT BEGIN:VEVENT UID:a982c0c5-bd42-41fa-9744-75d7532a6fe6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251015T011152Z DESCRIPTION:Speaker: Jackson Morris\, UW\n\nAlgebraic K-theory is a powerfu l invariant with surprising connections to algebraic geometry and number t heory. This talk will develop algebraic K-theory from the perspective of t hese connections. I will introduce lower K-groups\, Milnor K-theory\, and higher algebraic K-theory\, focusing on conjectures in number theory (both open and solved) which are phrased in the language of algebraic K-theory. Time permitting\, I will discuss connections with syntomic cohomology. DTSTART;TZID=America/Los_Angeles:20251030T150000 DTEND;TZID=America/Los_Angeles:20251030T160000 LAST-MODIFIED:20251015T011203Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Algebraic K theory nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-30/student-ag-seminar-algebr aic-k-theory-nbsp END:VEVENT BEGIN:VEVENT UID:555e2ff1-0ad2-4e96-b998-30794b349f69 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T225156Z DTSTART;TZID=America/Los_Angeles:20251030T163000 DTEND;TZID=America/Los_Angeles:20251030T173000 LAST-MODIFIED:20251007T230212Z LOCATION:PDL C-38 SUMMARY:: Milestone lightening talks and Halloween dress as your advisor TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-30/milestone-lightening-talk s-and-halloween-dress-your-advisor END:VEVENT BEGIN:VEVENT UID:f3519532-c99f-49ff-b71f-21e594a4e7a6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251030T003427Z DESCRIPTION:Speaker: Alex Gu\n\nLarge language models (LLMs) have made stea dy progress in formal mathematics\, achieving near–International Mathemati cal Olympiad (IMO) performance. This talk presents two complementary advan ces toward more capable and interpretable formal proving systems. First\, we introduce LeanDojo\, a foundational open-source toolkit bridging ML and Lean\, enabling large-scale data extraction\, interactive training\, and the development of ReProver\, a retrieval-augmented Lean prover. Next\, we turn to a critical challenge: proofs produced by LLMs are often unnecessa rily long\, redundant\, and opaque. To mitigate this\, we introduce ProofO ptimizer\, a system that automatically simplifies Lean proofs while preser ving correctness. It combines symbolic linting\, a fine-tuned 7B model\, a nd iterative refinement\, reducing proof length by up to 87% on MiniF2F an d 57% on PutnamBench\, even halving some IMO-level proofs. Together\, thes e systems demonstrate how AI can make automated proofs not only possible\, but also increasingly comprehensible. DTSTART;TZID=America/Los_Angeles:20251031T123000 DTEND;TZID=America/Los_Angeles:20251031T133000 LAST-MODIFIED:20260121T212216Z LOCATION:PDL C-038 SUMMARY:: Proving and Improving Language Models for Theorem Proving and Pro of Shortening in Lean TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-31/proving-and-improving-lan guage-models-theorem-proving-and-proof-shortening-lean END:VEVENT BEGIN:VEVENT UID:6daa0dd7-4ae0-4073-b040-c0665528fe30 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251031T172124Z DESCRIPTION:Speaker: Connor McCausland\, University of Washington\n\nReduce d pipe dreams are combinatorial objects that encode some of the algebraic\ , enumerative\, geometric\, and probabilistic properties of Schubert and G rothendieck polynomials. In this talk\, we will introduce the basic proper ties of pipe dreams and the Rubey poset on reduced pipe dreams. We will th en discuss the two recent papers by Axelrod-Freed\, Defant\, Mularczyk\, N guyen\, Tung and Billey\, Minnerath\, McCausland which independently prove d that the Rubey poset is a lattice. DTSTART;TZID=America/Los_Angeles:20251031T143000 DTEND;TZID=America/Los_Angeles:20251031T153000 LAST-MODIFIED:20251031T172531Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar Pipe dreams and Rubey s lattice TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-10-31/back-school-seminar-pipe- dreams-and-rubey-s-lattice END:VEVENT BEGIN:VEVENT UID:852af1b7-6dc6-469e-9ae6-abfeedd749f8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251013T180706Z DESCRIPTION:Speaker: Justin Bloom\n\nTitle: Finite flat group schemes and c ohomologyAbstract: We will discuss the geometry of finite flat group schem es and some beautiful applications of moduli theory to representation theo ry. We'll discuss a sixty-year history of finite generation results in coh omology\, culminating in van der Kallen's recent work over a noetherian ba se ring. DTSTART;TZID=America/Los_Angeles:20251103T113000 DTEND;TZID=America/Los_Angeles:20251103T123000 LAST-MODIFIED:20251013T180706Z LOCATION:SIG 228 SUMMARY:: Finite flat group schemes and cohomology TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-03/finite-flat-group-schemes -and-cohomology END:VEVENT BEGIN:VEVENT UID:50acdc1e-b886-43e3-94b5-813b4cf90637 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251028T145630Z DESCRIPTION:Speaker: Garrett Mulcahy\, UW\n\nThe central question in optima l transport is the following: how does one 'optimally' move a unit mass fr om one distribution to another? A computationally feasible way to approxim ately compute this optimal transport plan is done by regularizing with a q uantity called relative entropy\, giving rise to an object called the Schr ödinger bridge. In this talk\, we present a collection of explicit diffusi on approximations to small temperature (i.e. small regularization paramete r) Schrödinger bridges. In the case when both marginals are the same\, the setting we consider includes manifold-valued diffusions and Schrödinger b ridges computed with respect to reversible reference diffusions. By choosi ng the underlying space to be a Hessian manifold\, this approach gives an explicit diffusion approximation to the Euclidean Schrödinger bridge with different marginals. Joint work with Soumik Pal.   DTSTART;TZID=America/Los_Angeles:20251103T143000 DTEND;TZID=America/Los_Angeles:20251103T153000 LAST-MODIFIED:20251028T145630Z LOCATION:LOW 101 SUMMARY:: Diffusion Approximation to Schr dinger Bridges on Manifolds TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-03/diffusion-approximation-s chr-dinger-bridges-manifolds END:VEVENT BEGIN:VEVENT UID:7e895f00-6de3-49db-9e99-ac7ac8485114 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251016T211519Z DESCRIPTION:Speaker: Alexander Smith\, Northwestern University\n\nAmong the nondegenerate C^4 hypersurfaces\, we characterize the rational quadrics a s the hypersurfaces that are the least well approximated by rational point s. For all other hypersurfaces\, we give a heuristically sharp lower bound for the number of rational points near them\, improving the sensitivity o f prior results of Beresnevich and Huang. Our methods are dynamical\, invo lving the application of Ratner's theorems for unipotent orbits\, and we w ill show how our work relates to the dynamical resolution of the Oppenheim conjecture by Margulis. DTSTART;TZID=America/Los_Angeles:20251104T110000 DTEND;TZID=America/Los_Angeles:20251104T115000 LAST-MODIFIED:20251028T171746Z LOCATION:PDL C-401 SUMMARY:: Diophantine approximation for hypersurfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-04/diophantine-approximation -hypersurfaces END:VEVENT BEGIN:VEVENT UID:826bb273-fb46-4e13-91a0-a1256e3a7409 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251031T023528Z DESCRIPTION:Speaker: Martin Bishop (Northwestern)\n\nTitle pretalk: Introdu ction to twisted stable maps Abstract pretalk: Twisted stable maps are a g eneralization of stable maps\, which themselves are a generalization of st able curves. In this talk\, I will introduce and give examples of all of t hese objects. Title: A tour of twisted stable maps Abstract: In this talk I will discuss the various lines of thinking which have resulted from a jo int project with William C. Newman on the moduli space of twisted stable m aps. This talk will range over several topics: from stable maps to gerbes to Brauer and Picard groups. The goal of all of this will be to analyze th e structure of the moduli space of twisted stable maps and describe the in tegral Chow ring in some simple cases. DTSTART;TZID=America/Los_Angeles:20251104T134500 DTEND;TZID=America/Los_Angeles:20251104T153000 LAST-MODIFIED:20251031T023527Z LOCATION:PDL C-38 SUMMARY:: A tour of twisted stable maps TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-04/tour-twisted-stable-maps END:VEVENT BEGIN:VEVENT UID:4ae03c2a-cac2-4ae0-8115-f9d3af914aa4 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251017T042431Z DESCRIPTION:Speaker: Ada Stelzer\, University of Illinois Urbana-Champaign \n\nAbstract:When a reductive group \$G\$ acts on an embedded projective v ariety \$X\$\, the associated coordinate ring \$\mathbf C[X]\$ is a \$G\$- representation. The data of this representation may be recorded directly a s the \$G\$-equivariant Hilbert series of \$\mathbf C[X]\$\, or more compa ctly as its \$K\$-polynomial or twisted \$K\$-polynomial (which are connec ted to the minimal free resolution and multidegree of \$\mathbf C[X]\$ res pectively). Non-cancellative combinatorial rules for the coefficients in a ll three polynomials are therefore desirable. In this talk we focus on det erminantal varieties\, where the combinatorics of pipe dreams and the Robi nson-Schensted-Knuth correspondence naturally arise. We present joint work with Abigail Price and Alexander Yong describing the \$G\$-equivariant Hi lbert series of generalized determinantal varieties\, along with open prob lems and directions for future research.Note: This talk begins with a pre- seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting I D: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251105T153000 DTEND;TZID=America/Los_Angeles:20251105T170000 LAST-MODIFIED:20251017T042702Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Grothendieck polynomials determinantal varieties and equivariant Hilbert series TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-05/grothendieck-polynomials- determinantal-varieties-and-equivariant-hilbert-series END:VEVENT BEGIN:VEVENT UID:7c86adef-f0ff-4185-991f-8c1e9b3bee49 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251031T235205Z DESCRIPTION:Speaker: Peter May\, University of Chicago \n\nIn the 1990's\, symmetric monoidal categories of spectra were introduced\, That raised the question of how one can construct rings\, modules\, and other multiplicat ive structures in such categories.  I will explain a new approach that sta rts from an elementary new understanding of three equivalent formulations of exactly what symmetric monoidal categories are: the traditional definit ion made precise by Saunders MacLane long before my time\, a folklore oper adic definition as pseudoalgebras over the permutativity operad that was u nderstood in the 1970s\, and a new definition as special pseudofunctors fr om the category of finite based sets to categories.  With this equivalence \, it is quite easy to construct a functor from the multicategory of symme tric monoidal categories to the multicategory of spectra. The punchline is that this approach works equivariantly for any finite group G. For exampl e\, that gives an easy new way to construct the algebraic $K$-theory of a Galois extension with group $G$ as the homotopy groups of an $E_{\infty}$ ring $G$-spectrum. DTSTART;TZID=America/Los_Angeles:20251105T153000 DTEND;TZID=America/Los_Angeles:20251105T173000 LAST-MODIFIED:20251031T235237Z LOCATION:CMU-228 SUMMARY:: From symmetric monoidal categories to E infty ring spectra TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-05/symmetric-monoidal-catego ries-e-infty-ring-spectra END:VEVENT BEGIN:VEVENT UID:4b46fe20-3fd0-4c3d-a5e3-6728b794ddf0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251030T235631Z DESCRIPTION:Speaker: Alex Galarraga\, UW\n\nIn order to study the arithmeti c of curves over global fields\, I'll introduce the density degree set and its more geometric analogue\, the potential density degree set. We will s ee how the Mordell-Lang conjecture gives a geometric description of the po tential density degree set and use the geometry of the Picard group to com pute the potential density degree set for some nice curves. DTSTART;TZID=America/Los_Angeles:20251106T150000 DTEND;TZID=America/Los_Angeles:20251106T160000 LAST-MODIFIED:20251030T235644Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar The Potential Density Degree Set TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-06/student-ag-seminar-potent ial-density-degree-set END:VEVENT BEGIN:VEVENT UID:a633fd41-a6c8-4db6-abbe-68f6181eb747 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251105T091107Z DESCRIPTION:Speaker: Yu Shen\, Michigan State University\n\nIn this talk\, we study the category of twisted sheaves over a scheme \$X\$. Let \$M\$ be a quasi-coherent sheaf on \$X\$\, and \$\alpha\$ in \$\mathrm{Br}(X)\$. W e show that the functor \$- \otimes_{\mathcal{O}_X} M:\mathrm{QCoh}(X\,\al pha) \to \mathrm{QCoh}(X\,\alpha)\$ is naturally isomorphic to the identit y functor if and only if \$M \cong \mathcal{O}_X\$. As a corollary\, the a ction of \$\mathrm{Pic}(X)\$ on \$\mathrm{D}^b(X\,\alpha)\$ is faithful fo r any Noetherian scheme \$X\$. DTSTART;TZID=America/Los_Angeles:20251106T160000 DTEND;TZID=America/Los_Angeles:20251106T170000 LAST-MODIFIED:20251106T203407Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Picard group action on the category of twisted sheaves TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-06/student-ag-seminar-picard -group-action-category-twisted-sheaves END:VEVENT BEGIN:VEVENT UID:d9760ca4-4816-4a1e-888f-109c59392d70 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251007T225417Z DTSTART;TZID=America/Los_Angeles:20251106T163000 DTEND;TZID=America/Los_Angeles:20251106T180000 LAST-MODIFIED:20251020T230600Z LOCATION:PDL C-38 SUMMARY:: Application materials final reading session TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-06/application-materials-fin al-reading-session END:VEVENT BEGIN:VEVENT UID:b724f120-0739-4109-b538-a3f83e0cd2e0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251106T230904Z DESCRIPTION:Speaker: Daniel Rostamloo\, UW\n\nIn the past decade\, several major advances in p-adic cohomology theory have ushered in a multitude of new questions and applications across homotopy theory\, number theory\, an d algebraic geometry (extending even to birational geometry). At the heart of these developments is an elegant derived approach which has been essen tial for the discovery of new unifying theories. In this talk\, I will giv e a survey of the language and objects involved in this beautiful story wi th a view toward the Hochschild-Kostant-Rosenberg theorem\, a deep result connecting homotopy theory and de Rham cohomology. DTSTART;TZID=America/Los_Angeles:20251107T133000 DTEND;TZID=America/Los_Angeles:20251107T143000 LAST-MODIFIED:20251106T230904Z LOCATION:THO 325 SUMMARY:: DubTop Seminar Topological Structures in Derived Algebraic Geomet ry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-07/dubtop-seminar-topologica l-structures-derived-algebraic-geometry END:VEVENT BEGIN:VEVENT UID:ff2f0ba3-babe-4597-b023-0371e912e816 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251031T172507Z DESCRIPTION:Speaker: Dan Guyer\, University of Washington\n\nThe theory of \$h\$--numbers is an incredibly rich one. In this talk\, we will begin by highlighting various viewpoints that one can use to understand the \$h\$-- numbers of simplicial complexes. From each new perspective\, we will gain new insights\, and through this journey\, we will traverse the lands of co mmutative algebra\, topology\, convex geometry\, and combinatorics. After seeing how each of these tools applies to simplicial complexes\, we will m ention how these classical techniques can be extended to the flag \$h\$--n umbers of Eulerian posets. In doing so\, we will illustrate a recursive de composition that one can use to compute the \$cd\$--index of a polytope (a mong many other spaces). This decomposition is the main result of joint wo rk with Felipe Caster and José Samper.   DTSTART;TZID=America/Los_Angeles:20251107T143000 DTEND;TZID=America/Los_Angeles:20251107T153000 LAST-MODIFIED:20251031T172507Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar A Tour of h numbers TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-07/back-school-seminar-tour- h-numbers END:VEVENT BEGIN:VEVENT UID:23c433e9-e319-423f-9f81-600fafa22408 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250811T171740Z DESCRIPTION:Speaker: Jeremy Kun\, Google\n\nIn this talk I'll give an overv iew of the mathematical side of the last eight years of my career as a sof tware engineer at Google. This splits into two parts: writing software to automate the planning and management of Google's data centers as part of t he Technical Infrastructure organization\, and\, in my current role\, brin ging homomorphic encryption to production systems as part of Google's Priv acy\, Safety and Security Research group. The former used a variety of mat hematics related to operations research\, data science\, and cost modeling . The latter involves a mixture of cryptography\, ring theory\, with a var iety of sub-problems in related discrete mathematics fields. DTSTART;TZID=America/Los_Angeles:20251107T153000 DTEND;TZID=America/Los_Angeles:20251107T163000 LAST-MODIFIED:20260226T181625Z LOCATION:ECE 125 SUMMARY:: Planning Datacenters and Protecting Data at Google TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-07/planning-datacenters-and- protecting-data-google END:VEVENT BEGIN:VEVENT UID:459c254c-de96-459c-86e7-892a469c2119 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251102T223908Z DESCRIPTION:Speaker: Ian Martin\n\nTitle:  Introduction to quantum groupsAb stract: Since its establishment in the 1980’s\, the theory of quantum grou ps has become a rich subject\, with many connections to other areas of mat hematics. We’ll cover some of the basic results on the structure of quantu m groups\, the classification of their finite dimensional modules (for q n ot a root of unity)\, and their quasitriangular structure. If time permits \, we’ll also briefly discuss some of their applications to knot theory. DTSTART;TZID=America/Los_Angeles:20251110T113000 DTEND;TZID=America/Los_Angeles:20251110T123000 LAST-MODIFIED:20251102T223949Z LOCATION:SIG 228 SUMMARY:: Introduction to quantum groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-10/introduction-quantum-grou ps END:VEVENT BEGIN:VEVENT UID:3f98a827-9b36-49be-9edd-1a857ab92686 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251104T045618Z DESCRIPTION:Speaker: Krutika Tawri\, University of Washington\, Applied Mat h\n\nThe aim of this talk is twofold: 1. We will first investigate the exi stence of weak solutions to a benchmark fluid-structure interaction proble m\,that involves a viscous fluid interacting with an elastic membrane\, pe rturbedwith white-in-time stochastic forces. The fluid flow is described b y the Navier-Stokes equations while the elastodynamics of the thin structu re is modeled bythe plate equations. The fluid and the structure are coupl ed via two sets ofcoupling conditions imposed at the fluid-structure inter face.2. We will then consider a simplified version of this model\, which r educes toa system structurally analogous to the stochastic compressible Eu ler equationswith linear damping. For this reduced system\, we will discus s the long-timedynamics and\, in particular\, the existence of statistical ly stationary solutionsby means of constructing approximations that preser ve key Euler structureswhile admitting invariant dynamics\, and extracting uniform estimates from thelimited dissipation provided by the linear damp ing. DTSTART;TZID=America/Los_Angeles:20251110T143000 DTEND;TZID=America/Los_Angeles:20251110T153000 LAST-MODIFIED:20251104T045618Z LOCATION:LOW 101 SUMMARY:: Stochastic moving boundary problems arising in fluid dynamicsand long time behavior of the solutions nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-10/stochastic-moving-boundar y-problems-arising-fluid-dynamicsand-long-time-behavior END:VEVENT BEGIN:VEVENT UID:6bae4ae5-bf2d-4124-b3e0-01093ab082a8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250922T173231Z DESCRIPTION:Speaker: Elena Kim\, MIT\n\nAbstract: A central question in qua ntum chaos is how classical chaotic dynamics influence quantum behavior. O n compact Riemannian manifolds\, pure quantum states correspond to Laplaci an eigenfunctions. The quantum unique ergodicity (QUE) conjecture of Rudni ck and Sarnak predicts that on hyperbolic manifolds\, all high-energy eige nfunctions become uniformly distributed. The asymptotic behavior of eigenf unctions can be formulated in terms of semiclassical measures\, which desc ribe the microlocal distribution of eigenfunction mass. One approach towar ds the QUE conjecture applies microlocal analysis and uncertainty principl es to characterize the support of semiclassical measures. I will discuss r ecent work that uses the breakthrough higher-dimensional fractal uncertain ty principle of Cohen. Using this uncertainty principle\, we prove the fir st result on the support of semiclassical measures on real hyperbolic n-ma nifolds.  To explain some of the main proof ideas\, we will discuss work o n the toy model of quantum cat maps. This is joint work with Nicholas Mill er. DTSTART;TZID=America/Los_Angeles:20251112T150000 DTEND;TZID=America/Los_Angeles:20251112T160000 LAST-MODIFIED:20260203T003446Z LOCATION:Denny 111 SUMMARY:: Support of semiclassical measures in higher dimensions TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-12/support-semiclassical-mea sures-higher-dimensions END:VEVENT BEGIN:VEVENT UID:ad01f629-18fd-48d0-853f-99a7d0347ba2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250924T214118Z DESCRIPTION:Speaker: Jingze Zhu (UC Irvine)\n\nIn this talk\, we discuss re cent developments of ancient solutions to the mean curvature flow in highe r dimensions. Consider an ancient flow asymptotic to a cylinder with the n umber of R factors equal to k\, we show that the asymptotic behavior of th e flow is characterized by a k x k matrix Q whose eigenvalues can only be 0 and 1. Under the noncollapsing assumption\, we further discuss rigidity results when Q is fully degenerate or fully nondegenerate. In the fully de generate case\, we obtain a complete classification. In the fully nondegen erate case\, we show that the solutions are determined by only k-1 paramet ers. This is based on joint work with Beomjun Choi and Wenkui Du. DTSTART;TZID=America/Los_Angeles:20251112T163000 DTEND;TZID=America/Los_Angeles:20251112T173000 LAST-MODIFIED:20251028T062451Z LOCATION:PDL C-038 SUMMARY:: Rigidity of ancient solutions to the mean curvature flow TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-12/rigidity-ancient-solution s-mean-curvature-flow END:VEVENT BEGIN:VEVENT UID:77759969-f462-4d2c-b9e0-ee92fcbb9f3a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251110T231650Z DESCRIPTION:Speaker: Ethan MacBrough\, UW\n\nMost algebraic geometers regar d Hironaka's resolution of singularities as an esoteric monolith\, useful to be aware of and use as a black box but too complicated to justify learn ing how it actually works. In reality\, the modern revised form of Hironak a's proof is surprisingly simple and conceptually elegant. Furthermore\, t he techniques used illustrate several fundamental principles of birational geometry in a relatively concrete setting\, which makes it a great starti ng point for learning the modern theory. In this talk I will explain the c ore ideas of the proof\, and hopefully be able to give you a fairly comple te sketch of how it works.  DTSTART;TZID=America/Los_Angeles:20251113T150000 DTEND;TZID=America/Los_Angeles:20251113T160000 LAST-MODIFIED:20251110T231714Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Resolution of singularities TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-13/student-ag-seminar-resolu tion-singularities END:VEVENT BEGIN:VEVENT UID:39ac2174-566c-485e-8f69-35a173446b68 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251008T235451Z DESCRIPTION:Speaker: Panelists: Maddy Brown\, Sarah Garner\, Vasily Ilin\, Cordelia Li\, Jonah Ostroff.\n\nCome learn what goes in to a successful sp ecial topics course. Including :what makes an engaging topic\, how to prop ose a topic\, what goes into running a course. We will hear from a panel a nd open up a discussion with everyone in attendance. DTSTART;TZID=America/Los_Angeles:20251113T163000 DTEND;TZID=America/Los_Angeles:20251113T173000 LAST-MODIFIED:20251110T231754Z LOCATION:PDL C-38 SUMMARY:: How to make a successful special topics course panel TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-13/how-make-successful-speci al-topics-course-panel END:VEVENT BEGIN:VEVENT UID:39a5cabc-fb02-47b9-890c-ba047f1fe2fe DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251112T203526Z DESCRIPTION:Speaker: Manyi Guo\, UW\n\nIn this talk I will explain how and why Toda brackets admit controllable bounds on their Adams filtration when considered in the synthetic setting. This control may seem subtle: one mu st keep track not only of the Adams filtrations of the maps\, but also of the Adams filtrations of the requisite homotopies. The category of synthet ic spectra provides exactly the right tool to organize this tracking. The synthetic version of Toda brackets also gives a refined understanding of “ crossing differentials” as well as capturing the Adams filtration of the c orresponding classical Toda brackets in the ordinary stable category. If t ime permits I will also discuss examples from the work of Burklund-Hahn-Se nger and of Lin-Wang-Xu. DTSTART;TZID=America/Los_Angeles:20251114T133000 DTEND;TZID=America/Los_Angeles:20251114T143000 LAST-MODIFIED:20251112T203526Z LOCATION:THO 325 SUMMARY:: DubTop Seminar Synthetic Toda brackets TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-14/dubtop-seminar-synthetic- toda-brackets END:VEVENT BEGIN:VEVENT UID:8e06be8b-5e0a-4a36-b77b-678d8698596a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251110T170553Z DESCRIPTION:Speaker: Varun Shah\, University of Washington\n\nProblems in e xtremal combinatorics ask how large or small a structure can be before a c ertain property becomes unavoidable. One such question concerns transversa ls -- collections of points that intersect every member of a given family of sets. In this talk\, we will look at transversals of families arising i n various geometric\, combinatorial and topological contexts to understand when such families admit small transversals and when large ones are unavo idable. Along the way\, we will encounter probabilistic\, combinatorial\, and topological methods that together illustrate the range of ideas underl ying modern combinatorics.   DTSTART;TZID=America/Los_Angeles:20251114T143000 DTEND;TZID=America/Los_Angeles:20251114T153000 LAST-MODIFIED:20251111T204957Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar Transversals in Combinatorics amp Geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-14/back-school-seminar-trans versals-combinatorics-amp-geometry END:VEVENT BEGIN:VEVENT UID:5c02b55f-3e00-4ed4-b58d-59b8923bcb96 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251114T123932Z DESCRIPTION:Speaker: Andrew Aguilar\n\nTitle: A green way to locally source indecomposable modulesAbstract: The representation theory of a finite gro up G\, over a field k of characteristic not dividing the order\, is well u nderstood and relies solely on classifying the finite list of simple modul es. In the modular case simple and indecomposable no longer coincide and t he list of indecomposables may not be finite. How does one even begin to c lassify the indecomposables? One approach is to do so locally. We will att empt to prove the Green correspondence\, which gives a correspondence betw een the indecomposables of G and the indecomposables of its p-local subgro ups. This provides a local-to-global approach to studying the representati on theory of G by its p-subgroups which\, often\, have simpler representat ion theory. DTSTART;TZID=America/Los_Angeles:20251117T113000 DTEND;TZID=America/Los_Angeles:20251117T123000 LAST-MODIFIED:20251114T123932Z LOCATION:SIG 228 SUMMARY:: A green way to locally source indecomposable modules TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-17/green-way-locally-source- indecomposable-modules END:VEVENT BEGIN:VEVENT UID:9d5056ab-906c-4c68-8345-2550768050cc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251111T231327Z DESCRIPTION:Speaker: Dan Mikulincer\, University of Washington\n\nMany func tional inequalities admit short and elegant proofs when approached through stochastic analysis. Often\, the key step is to identify a natural coupli ng between Brownian motions\, which in the simplest cases can be done in a trivial way. In this talk\, we will describe a setting where the trivial approach fails\, and where a more subtle coupling\, obtained through time reversal of the Wiener space\, plays a crucial role. In certain cases\, th is coupling even turns out to be optimal. DTSTART;TZID=America/Los_Angeles:20251117T143000 DTEND;TZID=America/Los_Angeles:20251117T153000 LAST-MODIFIED:20251111T231327Z LOCATION:LOW 101 SUMMARY:: Coupling via Pathwise Time Reversal TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-17/coupling-pathwise-time-re versal END:VEVENT BEGIN:VEVENT UID:926148a9-6f95-4aa3-b812-919c0ecab63b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251107T202851Z DESCRIPTION:Speaker: Guilherme Vedana\, IMPA\n\nThe Sphere Packing problem asks for the densest way of covering the euclidean space IR^d with congrue nt\, solid balls. It was solved just for dimensions 1\,2\,3\,8\,24\, the l ast two proved by Maryna Viazovska and her collaborators. In this talk we present a variation of this problem in which we forbid some short distance s between centers of spheres. We prove that\, under certain conditions\, a ny sphere packing in 48 dimensions has center density less or equal than ( 3/2)^{24}. Equality occurs for periodic packings if and only if the packin g is given by a 48-dimensional even unimodular extremal lattice. DTSTART;TZID=America/Los_Angeles:20251117T150000 DTEND;TZID=America/Los_Angeles:20251117T160000 LAST-MODIFIED:20251108T150904Z LOCATION:PDL C-38 SUMMARY:: Sphere packings with forbidden distances TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-17/sphere-packings-forbidden -distances END:VEVENT BEGIN:VEVENT UID:5d12ecfd-4916-4d9a-94a0-bdc89cdb1b5e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251106T222204Z DESCRIPTION:Speaker: Alex Galarraga\, University of Washington\n\nIn a cons truction analogous to the classical modular curves\, one can construct mod uli spaces parametrizing dynamical systems with specified preperiodic stru cture. For the family of quadratic polynomials\, these moduli spaces are k nown as the dynamical modular curves. We determine which dynamical modular curves have infinitely many cubic points. This is joint work with John R. Doyle. DTSTART;TZID=America/Los_Angeles:20251118T110000 DTEND;TZID=America/Los_Angeles:20251118T115000 LAST-MODIFIED:20251106T222204Z LOCATION:PDL C-401 SUMMARY:: Cubic points on dynamical modular curves nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-18/cubic-points-dynamical-mo dular-curves-nbsp END:VEVENT BEGIN:VEVENT UID:1ee98a2a-deff-4428-a1e8-8ee005c0d472 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251110T220132Z DESCRIPTION:Speaker: Kent Vashaw (UCLA)\n\nTitle pretalk: Prime ideal spect ra for tensor categoriesAbstract pretalk: Given a non-semisimple abelian t ensor category C (e.g. representations of a finite group taken over a fiel d of characteristic p\, which divides the order of the group) a basic prob lem is to describe the indecomposable objects up to a reasonable notion of equivalence. In even basic examples\, describing the indecomposables up t o isomorphism is impossible. In order to understand indecomposable modules up to a rougher notion of equivalence\, we will define a topological spac e\, called the Balmer spectrum\, associated to C via prime ideals. This wa s accomplished in the symmetric case by Balmer\, and was developed in the nonsymmetric case by Buan—Krause—Solberg and by Nakano—V.--Yakimov. We wil l describe topological properties of the Balmer spectrum and give illustra tions using semidirect products.  Title: Support varieties and the Nerves of Steel ConjectureAbstract: Support varieties\, in many different forms\, have been a major tool in representation theory\, and include Quillen's c ohomological support varieties for finite groups\, Carlson's rank varietie s for elementary abelian p-groups\, and the Pi-point supports of Friedland er--Pevtsova for finite group schemes. The Balmer spectrum is universal sp ace for supports for any monoidal triangulated category. The Nerves of Ste el Conjecture\, proposed by Balmer in 2020\, posits that for any tensor tr iangulated category\, every point of the Balmer spectrum is witnessed by a unique tensor functor to a sufficiently simple tensor category. We prove that Nerves of Steel holds for coordinate rings of finite group schemes. T his talk will focus on joint work with Dan Nakano and Milen Yakimov. DTSTART;TZID=America/Los_Angeles:20251118T134500 DTEND;TZID=America/Los_Angeles:20251118T153000 LAST-MODIFIED:20251110T220132Z LOCATION:PDL C-38 SUMMARY:: Support varieties and the Nerves of Steel Conjecture TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-18/support-varieties-and-ner ves-steel-conjecture END:VEVENT BEGIN:VEVENT UID:0950e427-bec5-4c41-8733-af92aa95f493 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210520Z DESCRIPTION:AGENDA Call to OrderChair's RemarksDiscussion of activity check lists and information from Compliance ServicesAnnouncementsMasters program - PalConsent AgendaDiscussion of bylawsCommittee ReportsReport from the G SRNew BusinessExecutive SessionAdjournmentMINUTESThe regular meeting of th e faculty of the Department of Mathematics was held in PDL C-38 at 3:30pm PST\, November 18\, 2025. Max Lieblich\, Chair\, presided over the meeting . Rose Choi was the recording secretary.Chair's RemarksThere’s been a dela y in committee assignments due to considerations of how departmental staff support may be heavily reduced in the fiscal year 2027. To prepare our de partment for this possibility\, faculty may be tapped to take over certain duties that were once handled by staff. At this moment the core committee assignments have been made: Executive\, Personnel\, Undergraduate Program \, Graduate Program\, AAP hiring\, Graduate Admissions\, and Library. The remaining committees will be determined later on. In the meantime\, ad hoc committees can be set up by individual faculty and are encouraged to do s o.The math department as a whole spends about $1.3m per year on grants. Mo re than $1m of that is spent on summer salaries and RAs. Our department ha s already built up half that amount in revenue from this summer alone. As we build up our summer research program\, the various experiential learnin g opportunities that we can push out to the community\, and our fee-based masters program\, the more self-sufficient the department will be.Starting next quarter the department meetings will be at 11am in a different room TBD with  catering.We do not expect to have very many jobs available next summer. However\, we are looking into alternative ways to provide teaching opportunities to the graduate students outside of summer teaching.The ope rating assumption at this juncture is that there will be no graduate exten sions. There will be a process by which students may request one\; but one should assume that they won’t be approved. Funding for grad students is s till up in the air and we won’t know the budget until much later on.There is an ongoing investigation of Title VI at the UW (as well as elsewhere). In discussion with the UW Compliance office\, we must be vigilant to follo w the guidelines in the checklist that was distributed via email in regard to hiring\, programs\, activities\, and admissions. For example\, the div ersity statement on our website may not be in full compliance\; therefore\ , we will be removing it in its entirety until the UW crafts an official v ersion for posting.AnnouncementsThere was a faculty committee started seve ral quarters ago to develop a fee-based masters program for the math depar tment (separate from the current state-based masters program). We cannot s hare the same name nor the same students. A group of five industry advisor s was assembled for guidance and feedback. After five iterations of the pr ogram\, the most recent version was sent out as a document via email and r eviewed by the associate dean of natural sciences. An announcement must be sent to the university system alerting them of our intent along with the name of the program (which can be changed later on) and a committee will n eed to take on the task of drafting the 15-page document which details eve ry element of the program. The School of Continuing Education will need to then approve the document as we provide evidence of its feasibility inclu ding sources of funding. Only then can we take steps towards actualizing t he program such as building the website\, advertising\, enrolling students \, etc. A motion was made to call the program “Masters in Mathematics of O ptimization and Artificial Intelligence.” A vote was held and approved.A r ecording studio has been set up in Jenni Taggart’s old office for instruct ors to use. Please contact Soumik Pal for access.Discussion of bylawsThe E xecutive Committee recommends the following amendment to paragraph 2.7 of the department’s bylaws: 'The Graduate Student Representative (GSR) is a g raduate student serving as liaison between the department's graduate stude nts and faculty. The GSR’s term begins at the start of Summer quarter and lasts for one year. The GSR shall be elected by the graduate students in t he Spring quarter immediately preceding the start of their term.“All candi dates in the GSR election must have completed the milestones appropriate f or their career stage\, as described in the Graduate Student Guide. A job description for the GSR will be maintained by the GSR and the Graduate Pro gram Coordinator and will be available to all GSR candidates during the el ection period in the Spring.“The GSR serves as a non-voting member of the Graduate Program Committee and is responsible for informing graduate stude nts of discussions at those Graduate Program Committee meetings at which t he GSR is present. The GSR shall not be present at discussions that expose any FERPA-protected information on the performance\, funding\, milestones \, or other aspects of the record of any individual graduate student or gr oup of graduate students\, and shall not receive information from the Comm ittee or any of its members about the outcomes of such discussions\, with the sole exception of information directly pertaining to the GSR\, which s hall be communicated to them in the same manner in which similar informati on is communicated to all other students in the graduate program.'A motion was made\, voted on\, and approved.Report from the GSRAs mentioned earlie r by Max\, there will be an extension process for graduate students\; howe ver\, there will very likely be no extensions. Advisors are encouraged to have a discussion with their advisees on what their plan will look like an d what applications should look like for the extension process.There will be a departmental chess league running next quarter. All are welcome to jo in.ADJOURNMENTThere being no new business\, the meeting passed into execut ive session at 4:37pm. DTSTART;TZID=America/Los_Angeles:20251118T153000 DTEND;TZID=America/Los_Angeles:20251118T163000 LAST-MODIFIED:20260108T211434Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-18/faculty-meeting END:VEVENT BEGIN:VEVENT UID:278928df-272e-4264-bcdc-9c496c3a56bc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250926T005720Z DESCRIPTION:Speaker: Robin Neumayer (CMU)\n\nThe capillary energy functiona l models the equilibrium shape of a liquid drop meeting a substrate at a p rescribed interior contact angle. We will discuss a rigidity theorem for v olume-preserving critical points of the capillary energy in the half-space : among all sets of finite perimeter\, every such critical configuration c orresponding to a prescribed contact angle between $90^{\circ}$ and $120^{ \circ}$ must be a finite union of spheres and spherical caps with the corr ect contact angle. Assuming that the tangential part of the capillary boun dary is $\mathcal{H}^n$-null\, this rigidity extends to the full hydrophob ic range of contact angles between $90^{\circ}$ and $180^{\circ}$. We will also present an anisotropic counterpart\, establishing rigidity under sui table lower density assumptions. DTSTART;TZID=America/Los_Angeles:20251119T150000 DTEND;TZID=America/Los_Angeles:20251119T160000 LAST-MODIFIED:20251022T211440Z LOCATION:DEN 111 SUMMARY:: Rigidity of critical points of hydrophobic capillary functionals TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-19/rigidity-critical-points- hydrophobic-capillary-functionals END:VEVENT BEGIN:VEVENT UID:98fe2a6e-ee9e-4179-9602-8d37dba9b312 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251017T042818Z DESCRIPTION:Speaker: Herman Chau\, University of Washington\n\nAbstract:The higher Bruhat orders are partial orders introduced by Manin and Schechtma n in 1989. The first higher Bruhat order is isomorphic to the well-known w eak Bruhat order on the symmetric group on \$1\, 2\, \ldots\, n\$. The sec ond higher Bruhat order is a partial order on commutation classes of reduc ed expressions for the longest permutation. In the general case\, these pa rtial orders can equivalently be described using hyperplane arrangements\, oriented matroids\, and zonotopal tilings. The higher Bruhat orders have applications to areas such as Bott-Samelson varieties and Steenrod algebra s. Generalizing the higher Bruhat orders to other settings has been an are a of recent interest. Following work of Ben Elias and Daniel Hothem\, we a ddress the problem of extending the notion of higher Bruhat orders to all intervals in the affine symmetric groups. We prove our construction holds for all symmetric group intervals.  We will discuss a conjectural generali zation for the affine case along with current results pertaining to commut ativity classes of reduced words in the affine setting. Finally\, we explo re connections to machine learning (ML) techniques in mathematical researc h and discuss our construction of the Algebraic Combinatorics Dataset Repo sitory for the ML community as well as two lessons learned about using ML for mathematical discovery.This talk is based on joint work with Sara Bill ey\, Kevin Liu and on joint work with Sara Billey\, Davis Brown\, Jesse He \, Helen Jenne\, Henry Kvinge\, and Mark Raugas.Note: This talk begins wit h a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk s tarts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974M eeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251119T153000 DTEND;TZID=America/Los_Angeles:20251119T170000 LAST-MODIFIED:20251118T194015Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Higher Bruhat Orders Affine Generalizations and Machine Learning Applications TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-19/higher-bruhat-orders-affi ne-generalizations-and-machine-learning-applications END:VEVENT BEGIN:VEVENT UID:8ee7564c-9b4d-4166-991f-46d252dd379f DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20251107T235746Z DESCRIPTION:Speaker: Herman Chau\n\n'On Enumerating and Generalizing Higher Bruhat Orders with Connections to Machine Learning'Advisor: Sara Billey DTSTART;TZID=America/Los_Angeles:20251119T160000 DTEND;TZID=America/Los_Angeles:20251119T170000 LAST-MODIFIED:20251107T235831Z LOCATION:PDL C-401 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-19/final-exam END:VEVENT BEGIN:VEVENT UID:31b3b040-e448-4b1b-b860-c2ba202dde45 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20251107T235647Z DESCRIPTION:Speaker: Charlie Magland\n\nAdvisor: Julia Pevtsova DTSTART;TZID=America/Los_Angeles:20251120T120000 DTEND;TZID=America/Los_Angeles:20251120T130000 LAST-MODIFIED:20251107T235729Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-20/general-exam END:VEVENT BEGIN:VEVENT UID:c8e84534-3bc2-4679-94c6-b57230c420c5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251117T231000Z DESCRIPTION:Speaker: Tyson Klingner\, UW\n\nThe classical uniformisation in complex geometry states that the universal cover of a given compact Riema nn surface is either the Riemann sphere\, the complex plane\, or the Poinc aré disc. In this talk we will introduce the notion of a stacky curve and discuss a uniformisation style result. DTSTART;TZID=America/Los_Angeles:20251120T150000 DTEND;TZID=America/Los_Angeles:20251120T160000 LAST-MODIFIED:20251117T231010Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Uniformisation of Stacky Curves TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-20/student-ag-seminar-unifor misation-stacky-curves END:VEVENT BEGIN:VEVENT UID:33f3a50c-6d0b-4276-98f6-450cc6e62151 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20251007T045845Z DESCRIPTION:Speaker: Jayadev Athreya (and possibly others)\n\nThis event i s aimed at graduate students who are entering the research-focused phase o f the PhD program. We will share our experiences on how to transition into research and the role and choice of an advisor. We will discuss how to us e your research time effectively and how to prepare for the general exam a nd the thesis defense. This talk will focus on general advice and encourag ement. All are welcome to attend\, ask questions\, and share their experie nces.This event is cross listed with the Current Topics Seminar. DTSTART;TZID=America/Los_Angeles:20251120T163000 DTEND;TZID=America/Los_Angeles:20251120T180000 LAST-MODIFIED:20251007T045845Z LOCATION:PDL C-38 SUMMARY:: Transition into Research TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-20/transition-research END:VEVENT BEGIN:VEVENT UID:5254020c-690b-4c5b-89d1-2bdebe4ade4b DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20251118T194628Z DESCRIPTION:Speaker: Mallory Dolorfino\n\nAdvisor: Bianca Viray DTSTART;TZID=America/Los_Angeles:20251121T090000 DTEND;TZID=America/Los_Angeles:20251121T100000 LAST-MODIFIED:20251118T194719Z LOCATION:Sieg Hall 230 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-21/general-exam END:VEVENT BEGIN:VEVENT UID:af7c8e12-a97f-427d-8c9b-368343606a2a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251113T021615Z DESCRIPTION:Speaker: Henry Kvinge\, PNNL & UW\n\nExamples play a critical r ole in the mathematician’s workflow\, enabling us to explore unfamiliar ma thematical landscapes\, building intuition and generating conjectures alon g the way. Of course\, there are many settings where a far greater number of examples can be generated than could be manually examined by any one pe rson. On the other hand\, recent progress in AI has resulted in pattern re cognition capabilities that can capture nuanced structural features in dat a at huge scales. In this talk we discuss the use of AI for conjecture gen eration in algebraic combinatorics. We will start by describing what we ha ve learned about the process of putting together a ‘math dataset’ aimed at machine learning. We then describe our Algebraic Combinatorics Dataset Re pository where we translated open problems and foundational results into a machine learning friendly format. We then discuss a specific example wher e we used graph neural networks and mechanistic interpretability to re-dis cover several theorems which characterize mutation equivalence classes of quivers.  DTSTART;TZID=America/Los_Angeles:20251121T123000 DTEND;TZID=America/Los_Angeles:20251121T133000 LAST-MODIFIED:20260121T212158Z LOCATION:C-038 SUMMARY:: Machine Learning for Accelerating Mathematical Discovery in Algeb raic Combinatorics nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-21/machine-learning-accelera ting-mathematical-discovery-algebraic-combinatorics-nbsp END:VEVENT BEGIN:VEVENT UID:d66bc538-0323-46ec-995b-f2c3d382addf DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251118T204801Z DESCRIPTION:Speaker: Jackson Morris\, UW\n\nThe stable homotopy groups of s pheres are hard to calculate. Chromatic homotopy theory offers an organiza tional principle to sort the elements of these groups into periodic layers . Adams constructed the first infinite family of v1-periodic elements in h is study of the J-homomorphism\; showing the nontriviality of these elemen ts requires use of what is known as the e-invariant. A more modern approac h to show nontriviality involves the Adams and Adams-Novikov spectral sequ ences\, and an even more modem approach categorifies this into F2-syntheti c spectra. This talk will give a brief introduction to v1-periodicity befo re discussing the Carrick--Davies (arXiv:2401.16508v2) method to detecting v1-periodicity via F2-synthetic spectra. DTSTART;TZID=America/Los_Angeles:20251121T133000 DTEND;TZID=America/Los_Angeles:20251121T143000 LAST-MODIFIED:20251118T204801Z LOCATION:THO 325 SUMMARY:: DubTop Seminar A synthetic approach to detecting v1 periodic fami lies TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-21/dubtop-seminar-synthetic- approach-detecting-v1-periodic-families END:VEVENT BEGIN:VEVENT UID:6df6df24-f289-45ac-8144-37a124405c58 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251110T170809Z DESCRIPTION:Speaker: Ting Gong\, University of Washington\n\nThere are many types of equivalences in algebraic geometry. In this talk\, after recalli ng what derived category and Grothendieck ring of varieties are\, we intro duce four types of equivalences: D-equivalence\, L-equivalence\, K-equival ence and isomorphism between varieties. We then state conjectures and evid ences on the relationship between the four of them\, and debrief the curre nt status quo. In this talk\, many examples and counterexamples will be pr ovided. DTSTART;TZID=America/Los_Angeles:20251121T143000 DTEND;TZID=America/Los_Angeles:20251121T153000 LAST-MODIFIED:20251119T183220Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar Equivalences of equivalences TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-21/back-school-seminar-equiv alences-equivalences END:VEVENT BEGIN:VEVENT UID:70638eef-028f-4d78-9f72-cf90a7684fdc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251114T174442Z DESCRIPTION:Speaker: Eric Zhu\, Brown University\n\nI will discuss the Brau er-Manin obstruction\, a generalization of the local-global principle in a rithmetic geometry. This idea is used to decide if polynomial equations ha ve rational solutions. It arises from a cohomological invariant of a varie ty called the Brauer group and we can use this group to find obstructions to rational points. Then\, I will discuss my work on the Brauer-Manin obst ruction of generalized Kummer varieties. These are varieties arising from finite order quotients of abelian varieties and I prove that the Brauer-Ma nin obstruction on these varieties can only come from elements of the Brau er group of certain orders. This is motivated by the work of Skorobogatov and Zarhin. DTSTART;TZID=America/Los_Angeles:20251125T110000 DTEND;TZID=America/Los_Angeles:20251125T115000 LAST-MODIFIED:20251114T174442Z SUMMARY:: Brauer Manin Obstructions on Generalized Kummer Varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-25/brauer-manin-obstructions -generalized-kummer-varieties END:VEVENT BEGIN:VEVENT UID:5f340cec-9eb3-448d-b56f-ee387d43d2a6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251121T024010Z DESCRIPTION:Speaker: Bernd Sturmfels (Max Plank Institute)\n\nTitle pretalk : Graph CurvesAbstract pretalk: We discuss arrangements of 2g-2 lines in a  projective space of dimension g-1\, where each line intersects three othe r lines. How to write the polynomials that cut out such a reducible curve\ , and how to perturb its coefficients? We aim for audience participation i n the cases g = 3\,4\,5. Title: Maximal Mumford Curves from Planar GraphsA bstract: We discuss article with Mario Kummer and Raluca Vlad in real non- archimedean  geometry.  A curve of genus g is maximal Mumford (MM) if it h as g+1 ovals and g tropical cycles. These concepts will be explained by ma ny colorful pictures. The main result is a construction of full-dimensiona l families of MM curves in the Hilbert scheme of canonical curves. DTSTART;TZID=America/Los_Angeles:20251125T134500 DTEND;TZID=America/Los_Angeles:20251125T153000 LAST-MODIFIED:20251121T024010Z LOCATION:PDL C-38 SUMMARY:: Maximal Mumford Curves from Planar Graphs TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-11-25/maximal-mumford-curves-pl anar-graphs END:VEVENT BEGIN:VEVENT UID:cceb0187-6a41-402c-aa28-376f4e786205 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251125T190307Z DESCRIPTION:Speaker: Hoi Nguyen\, Ohio State University\n\nThe study of roo ts of random polynomials is an active area of research that has been ongoi ng since the early 1900s. In this talk\, I will survey several recent deve lopments\, with an emphasis on robust frameworks that enable proofs of uni versality across a wide class of models. Topics will include global and lo cal correlation structures of zeros\, concentration phenomena\, persistenc e probabilities\, variance asymptotics for the number of real roots and CL T fluctuations.    DTSTART;TZID=America/Los_Angeles:20251201T143000 DTEND;TZID=America/Los_Angeles:20251201T153000 LAST-MODIFIED:20251125T190307Z LOCATION:LOW 101 SUMMARY:: On nbsp roots of random polynomials nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-01/nbsp-roots-random-polynom ials-nbsp END:VEVENT BEGIN:VEVENT UID:4b4aed16-41e7-43db-897d-6d4741054232 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251028T171953Z DESCRIPTION:Speaker: Trevor Wooley\, Purdue\n\nAbstract: Essentially optima l estimates have been obtained for mean values of Vinogradov’s exponential sum as a consequence of the decoupling method (by Bourgain\, Demeter and Guth)\, and the efficient congruencing method (by the speaker). Such work makes essential use of the fact that the system of Diophantine equations a ssociated with these mean values is translation-dilation invariant. We rep ort on progress for systems which are not translation-dilation invariant o btained by exploiting the arithmetic of function fields over the field of p-adic numbers. Counting problems for Diophantine equations feature promin ently. DTSTART;TZID=America/Los_Angeles:20251202T110000 DTEND;TZID=America/Los_Angeles:20251202T115000 LAST-MODIFIED:20251120T173218Z LOCATION:PDL C-401 SUMMARY:: Optimal mean value estimates and function field arithmetic TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-02/optimal-mean-value-estima tes-and-function-field-arithmetic END:VEVENT BEGIN:VEVENT UID:9d7d1f1d-557f-4560-bca6-74767e7561a7 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20241106T210533Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsMath AI Lab - A lperColloquium - RohdeConsent AgendaCommittee ReportsReport from the GSRNe w BusinessExecutive SessionAdjournmentMINUTESThe regular meeting of the fa culty of the Department of Mathematics was held in ALB 485 at 3:30pm PST\, December 2\, 2025. Max Lieblich\, Chair\, presided over the meeting. Rose Choi was the recording secretary.Chair's RemarksStarting in January\, the department meetings will be held in the HUB at 11am. There will be cateri ng.Jane Street Capital will provide the department with $20k per year for two years to provide summer support to our graduate students. They will al so provide $5k this year and $10k next  year to go towards departmental so cial events.Jarod Alper will be conducting research at Google DeepMind nex t year.WXML will receive $50k over the next four years from Vaho Rebassoo. Seminar funding will now provide $300 per external speaker with no seminar cap as of January but the meal reimbursement policy will remain the same. AAP hiring is underway. We are planning to hire up to three people and Bel la Novik is chairing the Search Committee. You will receive communications from her about the process.There will be two rounds of solicitations for summer teaching: faculty will be eligible for the first round followed by the graduate students. The Program and Executive Committees formulated the salary structure: faculty will be paid per course at either 1 months sala ry or $10k (whichever is smaller) whilst the graduate students will be pai d at the union rate. Instructor mentors will receive $3k and the MSC direc tor $5k. The MSC director position will be open to both faculty and gradua te students this year. All courses this summer will be hybrid.Simons trave l grant applications are due at the end of January. Please consider applyi ng for it in light of the uncertainties surrounding the NSF. AMS fellowshi ps may also be available. Please contact Pam ASAP if you are interested.Me rit evaluations will run earlier this year in order to meet the CAS guidel ines for promotion reviews in April. The Personnel Committee has proposed running the review process in two forms: the merit process and the review process.AnnouncementsNext Wednesday\, December 10th from 4-5:30pm in OUG 1 36\, is the final Math AI Lab poster presentation in conjunction with WXML \; please attend. This lab evolved from WXML growing into a more lab drive n model with year-long projects and multiple graduate student mentors\, fa culty\, and post-docs. Over time\, the lab may bifurcate into a pure resea rch lab and one with capstone projects that could potentially provide oppo rtunities for departmental revenue and partnerships with industry. The lab has already received $60k in gifts with another anonymous $50k gift in pr ocess\, $20k of AWS credit from the eScience Institute in the works\, and potentially $40k from Nebius AI. We are in discussions with Madrona Invest ing and Amazon to fund the LEAN hackathon in the spring\; we’ve built up c onnections with other departments around campus with an eye towards a cert ificate in the masters program focused on AI in math\; potential affiliate positions to industry professionals to teach or co-teach math AI courses\ ; build industry connections to fund future AI math projects. Faculty and postdocs are needed to join our mentorship projects. This could also provi de an avenue for undergraduates to participate in research.Speakers with b road viewpoints that can appeal to a more general audience are needed for the colloquia. Please contact Steffen Rohde with suggestions. Rohde will b e stepping down as colloquium chair next year.We will be bringing back the Milliman Lectures this year with Richard Kenyon as the first speaker this May from the 12th thru 14th.Report from the GSRThe Current Topics seminar will be in the Winter quarter rather than the Fall. There are a couple of spots left for speakers. If you are interested\, please contact one of th e GSRs.ADJOURNMENTThere being no new business\, the meeting passed into ex ecutive session at 4:24pm. DTSTART;TZID=America/Los_Angeles:20251202T153000 DTEND;TZID=America/Los_Angeles:20251202T163000 LAST-MODIFIED:20260109T004201Z LOCATION:Allen Library North\, 4th Floor\, Room 485​ ​(Petersen Room​) SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-02/faculty-meeting END:VEVENT BEGIN:VEVENT UID:b00ab391-219c-427c-ba07-131f21a22a13 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251017T042920Z DESCRIPTION:Speaker: Clare Minnerath\, University of Washington\n\nAbstract :In 2011\, Rubey generalized chute and ladder moves on the set of reduced pipe dreams for a permutation \$w\$ and conjectured that the induced poset on reduced pipe dreams is a lattice. In recent work\, we prove this conje cture. Our key tool is a new type of move operation \$\mathcal{M}_{ij}\$\, defined as a composite of certain generalized ladder moves and later simp lified in terms of swaps on a partition shape. We show that joins and meet s exist in Rubey's poset by proving simple recursive formulas in terms of \$\mathcal{M}_{ij}\$ operations. In addition\, we give an explicit criteri on to determine if two elements of the Rubey lattice are comparable using an injective map from reduced pipe dreams to tableaux on the diagram of a permutation. The pipe dream tableaux construction also gives an exact form ula for the maximal length of any chain in the Rubey lattice and bounds on the number of reduced pipe dreams for \$w\$\, or equivalently the number of terms in the corresponding Schubert polynomial.This talk is based on jo int work with Sara Billey and Connor McCausland. An independent proof of R ubey's conjecture was simultaneously given by Ilani Axelrod-Freed\, Colin Defant\, Hanna Mularczyk\, Son Nguyen\, and Katherine Tung. Note: This tal k begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/ 91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251203T153000 DTEND;TZID=America/Los_Angeles:20251203T170000 LAST-MODIFIED:20251110T234624Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: A proof of Rubey s lattice conjecture TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-03/proof-rubey-s-lattice-con jecture END:VEVENT BEGIN:VEVENT UID:a7e08dbc-d0ba-431d-84a9-8124a01f0793 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20251121T232718Z DESCRIPTION:Speaker: Clare Minnerath\n\nAdvisor: Sara Billey DTSTART;TZID=America/Los_Angeles:20251203T160000 DTEND;TZID=America/Los_Angeles:20251203T170000 LAST-MODIFIED:20251121T233639Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-03/general-exam END:VEVENT BEGIN:VEVENT UID:f288bd13-dffd-4db2-aa25-d10e89a3ed42 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251203T043110Z DESCRIPTION:Speaker: Jay Reiter\, UW\n\nTo a stable infinity category \$C\$ equipped with a well-behaved homology functor to an abelian category \$A\ $\, Patchkoria--Pstrągowski associate a derived category which\, in a prec ise sense\, interpolates between cohomology objects in \$C\$ and descent s pectral sequences in \$A\$ abutting to them. In this talk\, we will begin by showing how this derived category arises naturally when trying to infin ity-categorify injective resolutions and then take a close look at its con struction which axiomatizes the deformation-theoretic ideas behind synthet ic spectra. DTSTART;TZID=America/Los_Angeles:20251204T150000 DTEND;TZID=America/Los_Angeles:20251204T160000 LAST-MODIFIED:20251203T043122Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Deformations of stable infinity categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-04/student-ag-seminar-deform ations-stable-infinity-categories END:VEVENT BEGIN:VEVENT UID:6a050a96-b76c-4bd5-854b-3c31233134fb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251129T050803Z DESCRIPTION:Speaker: Maksym Zubkov\n\nIn this talk\, I will give an overvie w of neuroalgebraic geometry\, a new field\, analogous to algebraic statis tics\, that uses algebraic geometry to understand different neural network architectures. Our main object of study will be a neuromanifold and its e xpressivity. A neuromanifold is defined as an embedding of the parameter s pace of a fixed neural network into a fixed ambient space of functions\, w hile expressivity is defined as the capability of a neural network to appr oximate an element in the ambient space arbitrarily well. We will consider two types of activation functions: polynomial and rational. For each of t hese activation functions\, we will construct the Zariski closure of a neu romanifold\, called a neurovariety\, and show that understanding the geome try of a neuromanifold or neurovariety is equivalent to understanding long -standing and beautiful objects of classical algebraic geometry such as se cant varieties\, Chow varieties\, and others. Finally\, we will briefly di scuss analogues of neuromanifolds over finite fields and show how simple p oint-counting can reveal further insights into the expressivity of neural networks and the geometry of a neuromanifold over the complex or real numb ers.  DTSTART;TZID=America/Los_Angeles:20251205T123000 DTEND;TZID=America/Los_Angeles:20251205T133000 LAST-MODIFIED:20260121T212103Z LOCATION:PDL C-38 SUMMARY:: Geometry and Expressivity of Neuromanifolds Where Algebraic Geome try Meets Neural Networks nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-05/geometry-and-expressivity -neuromanifolds-where-algebraic-geometry-meets-neural END:VEVENT BEGIN:VEVENT UID:3428f92a-cfab-4d54-ab07-0d35f53fe7d7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251204T193554Z DESCRIPTION:Speaker: Nelson Niu\, UW\n\nThirty years ago\, Thomason showed that Segal’s K-theory functor is an equivalence between a stable homotopy category of symmetric monoidal categories and the stable homotopy category of connective spectra\, passing through certain category-valued functors. We will present Mandell’s alternate proof of this result exhibiting an ex plicit inverse K-theory functor\, reviewing the necessary (multi)categoric al background\, as well as Elmendorf and Johnson-Yau’s proofs that this fu nctor also preserves multiplicative data. Finally\, as is the custom and m y true motivation\, we conjecture how this may be generalized equivariantl y.  DTSTART;TZID=America/Los_Angeles:20251205T133000 DTEND;TZID=America/Los_Angeles:20251205T143000 LAST-MODIFIED:20251204T193554Z LOCATION:THO 325 SUMMARY:: DubTop Seminar the inverse K theory multifunctor TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-05/dubtop-seminar-inverse-k- theory-multifunctor END:VEVENT BEGIN:VEVENT UID:21ff9748-c61b-4e9e-b990-4159e57a9877 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251110T170913Z DESCRIPTION:Speaker: Bryan Lu\, University of Washington\n\nTBA DTSTART;TZID=America/Los_Angeles:20251205T143000 DTEND;TZID=America/Los_Angeles:20251205T153000 LAST-MODIFIED:20251110T170913Z LOCATION:PDL C-38 SUMMARY:: Back to School Seminar TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-05/back-school-seminar-tba END:VEVENT BEGIN:VEVENT UID:1d82c3e1-d13b-4753-ba22-182973bbe868 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20251201T223815Z DESCRIPTION:Speaker: Sarafina Ford\n\n'Automorphisms and homological proper ties of locally gentle algebras'Advisor: James Zhang DTSTART;TZID=America/Los_Angeles:20251208T130000 DTEND;TZID=America/Los_Angeles:20251208T140000 LAST-MODIFIED:20251201T223928Z LOCATION:CMU 243 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-08/final-exam END:VEVENT BEGIN:VEVENT UID:a8700ca2-81b2-4c8d-93af-6f36c27657c8 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20251202T182049Z DESCRIPTION:Speaker: Garcia Sun \n\nAdvisor: James Zhang DTSTART;TZID=America/Los_Angeles:20251210T130000 DTEND;TZID=America/Los_Angeles:20251210T140000 LAST-MODIFIED:20251202T182205Z LOCATION:Communications Building (CMU) Room 230 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-10/general-exam-0 END:VEVENT BEGIN:VEVENT UID:e65adc78-114b-4734-86b6-a800d300e655 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20251202T181601Z DESCRIPTION:Speaker: Cordelia Li\n\nAdvisor: Ricky Liu DTSTART;TZID=America/Los_Angeles:20251210T140000 DTEND;TZID=America/Los_Angeles:20251210T150000 LAST-MODIFIED:20251202T181915Z LOCATION:PDL C-401 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-10/general-exam END:VEVENT BEGIN:VEVENT UID:a6f4adc6-4d8b-408f-af0a-c15ad2697939 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251204T053231Z DESCRIPTION:Speaker: Cordelia Li\, University of Washington\n\nAbstract:Hom omesy is a phenomenon in which certain statistics have the same average ov er all orbits under some group action. We examine the rowmotion action on rational points in fractional stable set polytopes of path graphs\, which can be viewed as a generalization of toggling on independent sets of paths . Our main theorem shows that for rational points in the fractional stable set polytope\, the difference between the first and last coordinate avera ges to zero in all orbits of rowmotion. This is joint work with Ricky Liu.  Note: There is no pre-seminar. This talk starts at 2 pm.Join Zoom Meeting : https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20251210T140000 DTEND;TZID=America/Los_Angeles:20251210T150000 LAST-MODIFIED:20251204T053536Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Homomesy on stable set polytopes of paths TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-10/homomesy-stable-set-polyt opes-paths END:VEVENT BEGIN:VEVENT UID:229f8b9e-bf7f-483d-b088-f701cf55db42 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20251121T025248Z DESCRIPTION:Speaker: Math AI Lab\n\nPlease join us to hear about all the ex citing work the Math AI Lab has been up to this quarter.  This quarter's p rojects have been:AI for Quantum Code CompilationDeep learning of number t heoryFormalizing Geometric Measure TheoryFormalizing StacksHow good are la nguage models at Lean?Lean error correction with language modelsMathematic ian's copilot: reliable theorem searchMonogenic extensions of regular loca l ringsProvable Computation in LeanReinforcement Learning for PolynomialsT eaching a computer to knot  DTSTART;TZID=America/Los_Angeles:20251210T160000 DTEND;TZID=America/Los_Angeles:20251210T173000 LAST-MODIFIED:20260121T221437Z LOCATION:OUG 136 & 141 SUMMARY:: Math AI Lab Poster Presentations TRANSP:OPAQUE URL:https://math.washington.edu/events/2025-12-10/math-ai-lab-poster-presen tations END:VEVENT BEGIN:VEVENT UID:05fa23f9-eeb9-46f9-b5c2-427127c6d314 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260105T075810Z DESCRIPTION:Speaker: Napoleon Wang\, University of Arizona\n\nThe Fargues–F ontaine curve \$X_{FF}\$ is a \$p\$-adic analogy to the projective line \$ \mathbb P^1\$\, constructed by Fargues-Fontaine in a way that \$p\$-adic H odge theoretic objects can be expressed via vector bundles with additional structure at a distinguished point \$x_\infty\$. In analogy with the Beau ville-Laszlo gluing description of Hecke modifications via the affine Gras smannian\, modifications of \$G\$-bundles at \$x_\infty\$ are described by the \$B^+_{dR}\$-affine Grassmannian (Fargues-Scholze). By Fargues-Fontai ne and Anschütz\, vector bundles on \$X_{FF}\$ are classified and formulat ed as an equivalence with isocrystals. More recent work by Birkbeck et al. and Hong refines this by studying extensions\, subbundles\, and quotient bundles using the Harder-Narasimhan polygons. In the end\, we will briefly discuss the relative versions of the Fargues-Fontaine curve over a perfec toid base following Kedlaya-Liu and Fargues-Scholze. DTSTART;TZID=America/Los_Angeles:20260108T150000 DTEND;TZID=America/Los_Angeles:20260108T160000 LAST-MODIFIED:20260105T075810Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Vector bundles on Fargues Fontaine curves TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-08/student-ag-seminar-vector -bundles-fargues-fontaine-curves END:VEVENT BEGIN:VEVENT UID:170442f8-cba2-4bfb-87f4-97a9b7c5f4a1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260107T194346Z DESCRIPTION:Speaker: Jonathan Zhu\n\nPlease join us for the first Current T opics seminar of the quarter. We will hear from Jonathan Zhu on his resear ch interests. We will have some time for questions and discussion after th e talk. DTSTART;TZID=America/Los_Angeles:20260108T163000 DTEND;TZID=America/Los_Angeles:20260108T180000 LAST-MODIFIED:20260107T195208Z LOCATION:PDL C-38 SUMMARY:: Current Topics Seminar Session 1 TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-08/current-topics-seminar-se ssion-1 END:VEVENT BEGIN:VEVENT UID:e7a209b3-6d1f-4834-b207-ccf7d00fc251 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260108T212703Z DESCRIPTION:Speaker: Wolfgang Allred\, University of Washington\n\nHave you ever wondered what the hell a G-equivariant sheaf is? If so\, then you're in good company. Drop by this Friday and we will explore equivariance tog ether. DTSTART;TZID=America/Los_Angeles:20260109T153000 DTEND;TZID=America/Los_Angeles:20260109T163000 LAST-MODIFIED:20260108T212717Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Equivariance for deranged TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-09/1-2-3-seminar-equivarianc e-deranged END:VEVENT BEGIN:VEVENT UID:a896f4c8-42c0-47a0-85ae-54eeff7399c3 DTSTAMP:20260617T145208Z CATEGORIES:Meetings\, Seminars\, Student Activities\, Workshops CLASS:PUBLIC CREATED:20260101T215731Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nWeekly event to learn Le an in a collaborative way. There are no prerequisites to participate.  DTSTART;TZID=America/Los_Angeles:20260109T153000 DTEND;TZID=America/Los_Angeles:20260109T173000 LAST-MODIFIED:20260101T221932Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-09/lean-together END:VEVENT BEGIN:VEVENT UID:58b18dab-6172-4918-902e-241bd25b7ccd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260105T004332Z DESCRIPTION:Speaker: Justin Bloom\n\nStudent Algebra and Representation The ory SeminarTitle: Actions on cohomologyAbstract: There are very important representations of reductive groups which occur as cohomology of some line bundle over a G-variety. We'll review the geometry of sheaves in order to see how to generalize these kinds of representations\, and what can go wr ong. DTSTART;TZID=America/Los_Angeles:20260112T113000 DTEND;TZID=America/Los_Angeles:20260112T123000 LAST-MODIFIED:20260109T235848Z LOCATION:SIG 228 SUMMARY:: StARTS Actions on cohomology TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-12/starts-actions-cohomology END:VEVENT BEGIN:VEVENT UID:b0869fdd-bd48-4855-a5e4-b7da03f6e71e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260107T035215Z DESCRIPTION:Speaker: Josh Meisel (CUNY)\n\nAbstract: Activated Random Walk (ARW) is a sandpile model intended to robustly exhibit self-organized crit icality (SOC)\, a proposed explanation from physics for how natural system s display critical behavior without any external tuning to a phase transit ion. I will discuss an upcoming work on asymmetric one-dimensional ARW whi ch verifies many predictions for the model. Namely\, the existence of a cr itical state is established\, shared by both the canonical model at its cr itical value\, as well as several variants with no tunable parameter. At c riticality\, it is shown that the system does not fixate\, and avalanches are finite with critical exponent at most 1/2. DTSTART;TZID=America/Los_Angeles:20260112T143000 DTEND;TZID=America/Los_Angeles:20260112T153000 LAST-MODIFIED:20260203T003435Z SUMMARY:: Self organized criticality in biased Activated Random Walk TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-12/self-organized-criticalit y-biased-activated-random-walk END:VEVENT BEGIN:VEVENT UID:7f27e98b-53a2-4138-bc0b-e6118df1b7f1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260109T010640Z DESCRIPTION:Speaker: Robert Schapire\, Microsoft Research\n\nNot all convex functions have finite minimizers\; some can only be minimized by a sequen ce as it heads to infinity. In this work\, we aim to develop a theory for understanding such minimizers at infinity. We study astral space\, a compa ct extension of Euclidean space to which such points at infinity have been added. Astral space is constructed to be as small as possible while still ensuring that all linear functions can be continuously extended to the ne w space. Although not a vector space\, nor even a metric space\, astral sp ace is nevertheless so well-structured as to allow useful and meaningful e xtensions of such concepts as convexity\, conjugacy\, and subdifferentials . We develop these concepts and analyze various properties of convex funct ions on astral space\, including the detailed structure of their minimizer s\, exact characterizations of continuity\, and convergence of descent alg orithms.  This is joint work with Miroslav Dudik and Matus Telgarsky. For further reading\, see: aka.ms/astral.  DTSTART;TZID=America/Los_Angeles:20260112T160000 DTEND;TZID=America/Los_Angeles:20260112T170000 LAST-MODIFIED:20260109T010735Z LOCATION:Gates Center (CSE2)\, G20\, Amazon Auditorium SUMMARY:: Convex Analysis at Infinity An Introduction to Astral Space TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-12/convex-analysis-infinity- introduction-astral-space END:VEVENT BEGIN:VEVENT UID:c89754bb-40b2-4964-9577-f1e18948c001 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T000802Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaC ommittee ReportsUndergraduate Committee - ThomasReport from the GSRNew Bus inessExecutive SessionAdjournmentMINUTESThe regular meeting of the faculty of the Department of Mathematics was held in HUB 214 at 11am PST\, Januar y 13\, 2026. Max Lieblich\, Chair\, presided over the meeting. Zawad Chowd hury was the recording secretary.Good NewsWe have received our TIF (Tempor ary Instructional Funds) amount\, which is the money used to fund TAs and UTAs.The number has remained flat\, no cuts.  Functionally\, that means a 10% cut because TAs are getting a raise.Plan is to admit 10 grad students this year for a robust class. Also planning to hire at least 3 AAPs. Will hear more soon from Stefan and Bella\, the respective committee chairs.The re is a Graduate Student “Appreciation Party” happening tomorrow (Wednesda y the 14th\, 5pm at Intellectual House).If you RSVPed\, make sure you show up!If you didn’t RSVP you are still welcome. Julia will bake an extra cak e if 5 people who didn’t sign up tell her they are coming.Joe Silverman is visiting this weekHe’s giving the AAG seminar talk today\, and also Collo quium on Friday.He’s also the upcoming president-elect of the AMS\, and wo uld be happy to chat about AMS affairs.Reach out to Bianca or Farbod if yo u want to meet with him. Wednesday in particular has many open slots.Chair RemarksThe university has issued a deadline for making class materials ac cessible by April.  There is nothing to freak out about\, reach out to Max if you want to discuss further.Natalie is making a document on best pract ices\, and will present at the next faculty meeting.This is a compliance i ssue for the university\, not for individuals.A reminder that we now have $300 for each seminar speaker\, with no per seminar cap.  Executive commit tee is discussing more about how best to spend research funds.Discussion o f merit review process.Our service plan for the next two quarters is focus ed on figuring out what we need to do and what we want to do.This is in pr eparation for impending possible changes to staffing\, where our support s taff could be reduced or cut.Executive committee + GPC/UPC will figure out the minimal set of things that are needed for the department to operateWi nter quarter is for the things that are needed\; Spring will be focused on the extra things that we want to do.This is impending because of a direct ive to centralize staffing. We are in a cohort with AMATH and STATS\, but unsure what this means in practice.“Change happens\, but it does not have to mean doom”.  AnnouncementsFarbod is a member of the dean search committ ee for the new dean of the College of Arts and Sciences.  It is a secret s earch\, so he will not be able to provide much information. But that makes now the best time to provide him input\, before he is loaded with secret information.Consent Agenda – NoneUndergrad Committee – RekhaAll our underg rad degrees are now minimum requirement majorsThis means there are no GPA requirements to enter. You just need to complete a set of classes.If stude nts are confused about the change\, send them to advising.Faculty should h old their standards where they should be. Don’t need to pass students to m eet any quota.We have prereqs in almost all classes except 124\, 200\, 208 \, and we never waive them.Don’t tell students to join a class despite pre reqs\, advising will reject it no matter what the faculty say.UW Prime res earch program happening this summer. Looking for project proposals from fa culty that will run for 6-9 weeks and be focused on research.GSR ReportThe GSR takes notes at all the faculty meetings\, to provide an update to gra d students of what was discussed.If any faculty member would like the note s from a meeting\, let the GSRs know and we can send it to you!New Busines s - NoneExecutive SessionWill last 5 minutes.  DTSTART;TZID=America/Los_Angeles:20260113T110000 DTEND;TZID=America/Los_Angeles:20260113T120000 LAST-MODIFIED:20260114T215122Z LOCATION:HUB 214 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-13/faculty-meeting END:VEVENT BEGIN:VEVENT UID:a94b94d4-eee8-455f-b834-016d93949035 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260108T191149Z DESCRIPTION:Speaker: Joe Silverman (Brown)\n\nPre-Seminar Title: Fun and Ga mes with the Markoff EquationAbstract pre-seminar: It is an amazing fact t hat all of the non-zero integer solutions to the Markoff equation x^2+y^2+ z^2=3xyz can be derived starting from the basic solution (1\,1\,1). I'll e xplain how this is done\, describe the infamous 'Unicity Conjecture'\, and as time permits\, look at similar results for a wider class of surfaces.S eminar Title: Varieties with Non-Commuting Involutions and Connectivity of the Graph of Mod p PointsAbstract: The Markoff equation M : x^2+y^2+z^2=3 xyz is an example of a surface having three non-commuting involutions\, wh ich Markoff used to give a complete description of the integer solutions. A natural local-global question is whether every solution over the finite field F_p lifts to a solution over Z\, or equivalently\, whether the funct ion graph of the non-zero F_p points is connected. A conjecture of Baragar (1990s) says that the answer is yes\, and work of Bourgain-Gamburd-Sarnak (2015-2025) and W. Chen (2023) resolves the question for all sufficiently large p.  In this talk I will describe their work\, and then I will discu ss joint work with Fuchs\, Litman\, and Tran studying  analogous problems for K3 surfaces X defined by (2\,2\,2)-forms in P^1xP^1xP^1 that similarly have three non-commuting involutions. DTSTART;TZID=America/Los_Angeles:20260113T134500 DTEND;TZID=America/Los_Angeles:20260113T153000 LAST-MODIFIED:20260108T191149Z LOCATION:PDL C-38 SUMMARY:: Varieties with Non Commuting Involutions and Connectivity of the Graph of Mod p Points TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-13/varieties-non-commuting-i nvolutions-and-connectivity-graph-mod-p-points END:VEVENT BEGIN:VEVENT UID:c77e8b0a-966e-4a29-ac00-c794231cc805 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260112T182932Z DESCRIPTION:Speaker: Danny Shi\, UW\n\nHistorically\, topological K-theory and its Bott periodicity have been very useful in solving key problems in algebraic and geometric topology. In this talk\, we will explore the perio dicities of higher real K-theories and their roles in several contexts\, i ncluding Hill--Hopkins--Ravenel’s solution of the Kervaire invariant one p roblem. We will prove periodicity theorems for higher real K-theories at t he prime 2 and show how these results feed into equivariant computations. We will then use these periodicities to measure the complexity of the RO(G )-graded homotopy groups of Lubin--Tate theories and to compute their equi variant slice spectral sequences. This is joint work with Zhipeng Duan\, M ike Hill\, Guchuan Li\, Yutao Liu\, Guozhen Wang\, and Zhouli Xu. DTSTART;TZID=America/Los_Angeles:20260113T153000 DTEND;TZID=America/Los_Angeles:20260113T163000 LAST-MODIFIED:20260112T183005Z LOCATION:PDL C-401 SUMMARY:: Periodicity and finite complexity in higher real K theories TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-13/periodicity-and-finite-co mplexity-higher-real-k-theories END:VEVENT BEGIN:VEVENT UID:eafe420d-7242-4855-bb76-11de7ba086e1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251215T064043Z DESCRIPTION:Speaker: Son Nguyen\, Massachusetts Institute of Technology\n\n Abstract:Elements of Lusztig's dual canonical bases are Schur-positive whe n evaluated on (generalized) Jacobi-Trudi matrices. This deep property was proved by Rhoades and Skandera\, relying on a result of Haiman\, and ulti mately on the (proof of) Kazhdan-Lusztig conjecture. For a particularly tr actable part of the dual canonical basis - called Temperley-Lieb immanants - we give a generalization of Littlewood-Richardson rule using shuffle ta bleaux. We then use our new rule to prove a special case of a Schur log-co ncavity conjecture by Lam-Postnikov-Pylyavskyy.Note: This talk begins with  a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk st arts at 4:10. The pre-seminar and talk are online-only but will be screene d in PDL C-401.Join Zoom Meeting: https://washington.zoom.us/j/91547335974 Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260114T153000 DTEND;TZID=America/Los_Angeles:20260114T170000 LAST-MODIFIED:20260109T045551Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Shuffle tableaux TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-14/shuffle-tableaux END:VEVENT BEGIN:VEVENT UID:a8817de2-fa9e-4311-a52b-ea944500a98b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260113T230835Z DTSTART;TZID=America/Los_Angeles:20260115T103000 DTEND;TZID=America/Los_Angeles:20260115T113000 LAST-MODIFIED:20260113T230835Z LOCATION:SIG 227 SUMMARY:: Introduction to derived algebraic geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-15/introduction-derived-alge braic-geometry END:VEVENT BEGIN:VEVENT UID:092563ab-61df-4b4c-93c0-4563562ba211 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260111T193957Z DESCRIPTION:Speaker: Sándor Kovács\, UW\n\nI will explain some surprising r elations between dualizing complexes and dualizing sheaves. Time permittin g I will explain some applications as well.  DTSTART;TZID=America/Los_Angeles:20260115T150000 DTEND;TZID=America/Los_Angeles:20260115T160000 LAST-MODIFIED:20260111T194005Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Unexpected relations for dualizing complexes TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-15/student-ag-seminar-unexpe cted-relations-dualizing-complexes END:VEVENT BEGIN:VEVENT UID:d042e870-1089-47f6-ab52-b898db15165b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260112T171219Z DESCRIPTION:Speaker: Dan Mikulincer\n\nWe will review different notions of what it means to be anti-concentrated and look at how these definitions re late to each other\, sometimes leading to surprising and nontrivial conseq uences. The talk will also cover applications ranging from algorithmic com plexity to harmonic analysis and convex geometry. DTSTART;TZID=America/Los_Angeles:20260115T163000 DTEND;TZID=America/Los_Angeles:20260115T180000 LAST-MODIFIED:20260112T171219Z LOCATION:PDL C-38 SUMMARY:: The Different Faces of Anti Concentration TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-15/different-faces-anti-conc entration END:VEVENT BEGIN:VEVENT UID:2f78c7c7-127f-4a89-95cf-127c61f66cde DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260114T211556Z DESCRIPTION:Speaker: Jackson Morris\, UW\n\nA recent trend in homotopy theo ry has been the replacement of the phrase 'There is a spectral sequence... ' with 'There is a filtration...'. This talk is an entryway into this shif t. We will begin by discussing motivation for studying filtrations as oppo sed to spectral sequences. Then\, we will introduce filtered objects and t -structures on stable \$\infty\$-categories. We will end by showing how tw o natural spectral sequences on a filtered object can be related.  DTSTART;TZID=America/Los_Angeles:20260116T133000 DTEND;TZID=America/Los_Angeles:20260116T143000 LAST-MODIFIED:20260114T211556Z LOCATION:CMU 230 SUMMARY:: DubTop Seminar Filtered objects spectral sequences and t structur es TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-16/dubtop-seminar-filtered-o bjects-spectral-sequences-and-t-structures END:VEVENT BEGIN:VEVENT UID:a896f4c8-42c0-47a0-85ae-54eeff7399c3 DTSTAMP:20260617T145208Z CATEGORIES:Meetings\, Seminars\, Student Activities\, Workshops CLASS:PUBLIC CREATED:20260101T215731Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nWeekly event to learn Le an in a collaborative way. There are no prerequisites to participate.  DTSTART;TZID=America/Los_Angeles:20260109T153000 DTEND;TZID=America/Los_Angeles:20260109T173000 LAST-MODIFIED:20260101T221932Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-09/lean-together END:VEVENT BEGIN:VEVENT UID:9f31000d-aacd-41fd-989e-68646bbb56c3 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20250805T165535Z DESCRIPTION:Speaker: Joseph H. Silverman\, Brown University\n\nAn abstract discrete dynamical system consists of a set X and a self-map f from X to i tself. Dynamics studies the orbits of points of X under repeated applicati on of f. When X and f are defined by polynomials\, algebraic geometry come s into play\, and when the polynomials have integer coefficients\, number theory joins the game. In the first part of this talk\, I will discuss how these three areas of mathematics\, dynamical systems\, algebraic geometry \, and number theory\, have come together in the past 30+ years to form th e active new field of arithmetic dynamics. In the second part I will give a taste of arithmetic dynamics through a recent conjecture which says that in the number theory setting\, there are lots of orbits of rational point s and that they are widely spaced throughout the space X. DTSTART;TZID=America/Los_Angeles:20260116T153000 DTEND;TZID=America/Los_Angeles:20260116T163000 LAST-MODIFIED:20251202T191701Z LOCATION:ECE 125 SUMMARY:: Dynamics Arithmetic and Wide Spacing of Orbits TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-16/dynamics-arithmetic-and-w ide-spacing-orbits END:VEVENT BEGIN:VEVENT UID:b593aefc-c799-4550-9bf9-89e3b155e69a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260114T200242Z DESCRIPTION:Speaker: Ivan Angiono (Cordoba)\n\nTitle: Hopfs algebras and in tegral formsAbstract: Quantum groups introduced byDrinfeld and Jimbo are H opf algebras defined over the field of functions in onevariable\, and can be thought of as deformations of universal envelopingalgebras of semisimpl e Lie algebras.In the 1990s\, two integral forms over the algebra of polyn omials in onevariable were considered\, which give rise\, via proper evalu ation of thevariable in complex numbers\, to two types of algebras: the qu antum groups of deConcini-Kac-Procesi and those of Lusztig. Both give rise to extensions of Hopfalgebras when the parameter is evaluated at a root o f unity.In this talk\, we will describe these two contexts\, together with the propertiesof the associated Hopf extensions and the generalizations o f these results tothe context of Lie superalgebras\, in the first case in a joint work with N.Andruskiewitsch and M. Yakimov\, and in the second com ing from a work inprogress with C. Vay. DTSTART;TZID=America/Los_Angeles:20260120T133000 DTEND;TZID=America/Los_Angeles:20260120T143000 LAST-MODIFIED:20260114T200242Z LOCATION:PDL C-38 SUMMARY:: Hopfs algebras and integral forms TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-20/hopfs-algebras-and-integr al-forms END:VEVENT BEGIN:VEVENT UID:fc803b00-3c40-49ca-8840-1168b25f4d28 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20260112T162101Z DESCRIPTION:Speaker: Tyson Klingner\n\nAdvisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20260120T140000 DTEND;TZID=America/Los_Angeles:20260120T150000 LAST-MODIFIED:20260112T162215Z LOCATION:PDL C-38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-20/general-exam END:VEVENT BEGIN:VEVENT UID:8af89fea-f053-4766-b947-cb7025a4f9b6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260116T205732Z DESCRIPTION:Speaker: Piotr Pstrągowski\, UW\n\nThe even filtration\, introd uced by Hahn-Raksit-Wilson\, is a canonical filtration attached to a commu tative ring spectrum which measures its failure to have homotopy groups co ncentrated in even degrees. Despite its extremely simple definition\, the even filtration recovers many geometrically and arithmetically important c onstructions\, such as the Adams-Novikov filtration of the sphere or the v arious motivic filtrations on topological Hochschild homology and its vari ants. A conjecture of Robert Burklund and Achim Krause predicts that the w hen applied to l-adic algebraic K-theory of a field\, the even filtration should recover the motivic filtration of Voevodsky\, relating the concept of evenness to algebraic cycles. In this talk\, I will talk about a proof of this conjecture for global and local fields.   DTSTART;TZID=America/Los_Angeles:20260120T153000 DTEND;TZID=America/Los_Angeles:20260120T163000 LAST-MODIFIED:20260120T025444Z LOCATION:PDL C-401 SUMMARY:: The even filtration and algebraic K theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-20/even-filtration-and-algeb raic-k-theory END:VEVENT BEGIN:VEVENT UID:ea77ee36-3005-4642-8cfd-7021aeaea4f7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251215T063737Z DESCRIPTION:Speaker: Yibo Gao\, Peking University\n\nAbstract:Billey-Postni kov (BP) decompositions govern when Schubert varieties decompose as bundle s of smaller Schubert varieties. In joint work with Christian Gaetz\, we f urther develop the theory of BP decompositions and show that\, in finite t ype\, they can be recognized by pattern conditions and are indexed by the order ideals of a poset bp(w) that we introduce\; we conjecture that this holds in any Coxeter group. We then apply BP decompositions to show that\, when X(w) is rationally smooth and W simply laced\, the Schubert structur e constants under w satisfy a triangularity property\, yielding a canonica l involution on the Schubert cells of X(w) respecting Poincaré duality. We also classify the rationally smooth Bruhat intervals in finite type (othe r than E) which admit generalized Lehmer codes\, answering questions and c onjectures of Billey-Fan-Losonczy\, Bolognini-Sentinelli\, and Bishop-Mili ćević-Thomas. Time permitting\, more implicit applications of BP decomposi tions will be discussed. Note: This talk is online-only. It begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk start s at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeti ng ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260121T153000 DTEND;TZID=America/Los_Angeles:20260121T170000 LAST-MODIFIED:20251215T063737Z LOCATION:Zoom Link: https://washington.zoom.us/j/91547335974 SUMMARY:: Billey Postnikov posets TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-21/billey-postnikov-posets END:VEVENT BEGIN:VEVENT UID:db7c371f-1ba9-49d0-a4e7-133a9de58a31 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251204T222815Z DESCRIPTION:Speaker: Stefan Steinerberger (UW)\n\nThere is an emerging inte rest in understanding the behavior of partial differential equations on gr aphs G=(V\,E).  The classic approach is to think of a graph as a (discreti zed) compact manifold without boundary (since there is no `complement'\, n o place where the domain/graph ends\, no boundary conditions are imposed).   I will discuss an axiomatic definition of boundary on graphs that intera cts well with classic ideas from Analysis and Probability Theory (includin g the isoperimetric inequality\, exit time estimates for Brownian motion\, the Faber-Krahn theorem\, Hardy's inequality and the Alexandrov-Bakelman- Pucci estimate).   I will not assume any prior knowledge and introduce all ideas from scratch\, there will also be many pretty pictures. DTSTART;TZID=America/Los_Angeles:20260121T153000 DTEND;TZID=America/Los_Angeles:20260121T163000 LAST-MODIFIED:20260203T003424Z LOCATION:DEN 111 SUMMARY:: PDEs in the discrete setting and the role of the boundary TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-21/pdes-discrete-setting-and -role-boundary END:VEVENT BEGIN:VEVENT UID:3ed50d44-eac9-4d66-a0ee-0dcebe814081 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260120T030634Z DESCRIPTION:Speaker: Daniel Rostamloo\n\nAbstract: I will give an overview of some fundamental objects and constructions in derived algebraic geometr y\, starting from commutative algebra and ending with derived stacks. Time permitting\, I will discuss the statements of Artin-Lurie and Toën-Vaquié representability. DTSTART;TZID=America/Los_Angeles:20260122T103000 DTEND;TZID=America/Los_Angeles:20260122T113000 LAST-MODIFIED:20260120T030845Z LOCATION:SIG 227 SUMMARY:: Basic objects in DAG TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-22/basic-objects-dag END:VEVENT BEGIN:VEVENT UID:fcbb821a-3ab1-461e-b212-3ba9e9b5bfd2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260117T005830Z DESCRIPTION:Speaker: Jay Reiter\, UW\n\nA common technique when studying a category \$\mathcal{C}\$ is to study a localization \$\mathcal{C}[W^{-1}]\ $ instead — this is what we’re doing when we study the homotopy category o f spaces or the derived category of complexes in an abelian category. Thes e localizations tend to have nice formal properties but can be slippery in other ways. For example\, colimits in these settings are often not functo rial! In this talk\, we’ll see examples of this problem in topology\, alge bra\, and geometry\, and then discuss how the theory of homotopy colimits addresses this issue by giving us precise control over many of the localiz ations we care about. Finally\, we’ll see how these homotopy-coherent cons tructions are best understood in the language of \$\infty\$-categories. DTSTART;TZID=America/Los_Angeles:20260122T150000 DTEND;TZID=America/Los_Angeles:20260122T160000 LAST-MODIFIED:20260117T005841Z LOCATION:PDL C-401 SUMMARY:: Homotopy colimits TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-22/homotopy-colimits END:VEVENT BEGIN:VEVENT UID:0b9c45d6-4062-4f69-a35b-effd55b292af DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260121T195727Z DESCRIPTION:Speaker: Bobby Wilson\n\nWe will discuss various topics in anal ysis including results on the Falconer distance set conjecture and well-po sedness of nonlinear Schrodinger equations. DTSTART;TZID=America/Los_Angeles:20260122T163000 DTEND;TZID=America/Los_Angeles:20260122T180000 LAST-MODIFIED:20260128T201248Z LOCATION:PDL C-38 SUMMARY:: Current Topics Seminar Topics in GMT and dispersive PDEs TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-22/current-topics-seminar-to pics-gmt-and-dispersive-pdes END:VEVENT BEGIN:VEVENT UID:12deefaf-532a-49bd-915e-a4a6d9252918 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260122T213931Z DESCRIPTION:Speaker: Daniel Rostamloo\, UW\n\nMotivated by the work of Simp son in the 90s\, many recent advances in modern arithmetic geometry have b een made by reinterpreting the cohomology of an object as the sheaf cohomo logy on a certain stack associated to the object. I will explain this proc ess and how it geometrizes the additional data of filtrations on certain c ohomology theories\, making the derived category of the stack a natural ca ndidate for a category of motives over the object. DTSTART;TZID=America/Los_Angeles:20260123T133000 DTEND;TZID=America/Los_Angeles:20260123T143000 LAST-MODIFIED:20260122T213931Z LOCATION:CMU 230 SUMMARY:: DubTop Seminar Geometrization TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-23/dubtop-seminar-geometriza tion END:VEVENT BEGIN:VEVENT UID:b2cbf3ed-5af7-481d-b152-cab0d1c565ec DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251230T123534Z DESCRIPTION:Speaker: Wuyang Chen\, Simon Fraser University\, Assistant Prof essor\n\nRecent progress in LLMs has transformed text and code generation\ , yet models still falter on PDEs (partial differential equation) where co rrectness\, constraints\, and physical consequences are critical. This tal k explores how formal LLM reasoning can advance symbolic PDE modeling. Fir st\, our PDE-Controller formalizes informal PDEs\, synthesizes solver-read y code\, and plans subgoals to tackle nonconvex control via interactions w ith external solvers. Second\, our Lean Finder accelerates PDE formalizati on with a semantics-aware search engine for Lean/Mathlib that retrieves re levant theorems\, outperforming GPT models and earning strong reception in the AI-for-math community. Together\, these efforts aim to close the loop between automated reasoning and human heuristics across diverse\, verifia ble scientific tasks.BioDr. Wuyang Chen is a tenure-track Assistant Profes sor in Computing Science at Simon Fraser University. Previously\, he was a postdoctoral researcher in Statistics at the University of California\, B erkeley. He obtained his Ph.D. in Electrical and Computer Engineering from the University of Texas at Austin in 2023. Dr. Chen's research focuses on integrating AI methods with physical knowledge\, scientific machine learn ing\, and theoretical understanding of deep networks. Dr. Chen has publish ed papers at CVPR\, ECCV\, ICLR\, ICML\, NeurIPS\, and other top conferenc es. Dr. Chen’s research has been recognized by the US NSF newsletter\, two Doctoral Dissertation Awards from INNS and iSchools\, AAAI New Faculty Hi ghlights\, and Nvidia Academic Grant Award. Dr. Chen also hosted and co-or ganized many conference workshops at NeurIPS\, ICLR\, CVPR. DTSTART;TZID=America/Los_Angeles:20260123T153000 DTEND;TZID=America/Los_Angeles:20260123T163000 LAST-MODIFIED:20260121T212020Z LOCATION:CMU B-006 SUMMARY:: Verifiable PDE Reasoning and Modeling with Neurosymbolics TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-23/verifiable-pde-reasoning- and-modeling-neurosymbolics END:VEVENT BEGIN:VEVENT UID:6317d64f-8fb7-43f6-a4fc-110a96f32c80 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20251201T212538Z DESCRIPTION:Speaker: Iván Angiono\, University of Cordoba\n\nA good way to understand the structure of a finite group is through its representations. The family of representations of a group on a fixed field has several pro perties: it is closed by finite direct sums\, by tensor products\, it cont ains the dual space and the tensor product of two representations is (natu rally) isomorphic to the tensor product of the same representations in the opposite order. The same properties are satisfied by the category of modu les of a Lie algebra\, as both are symmetric tensor categories.In this tal k we will introduce the notion of symmetric tensor categories\, provide ex amples of these categories starting by those coming from groups and Lie al gebras and explain some differences between the case of the complex number s and the one of a field of positive characteristic. DTSTART;TZID=America/Los_Angeles:20260123T153000 DTEND;TZID=America/Los_Angeles:20260123T163000 LAST-MODIFIED:20260122T181410Z LOCATION:ECE 105 SUMMARY:: CANCELED: A gentle introduction to symmetric tensor categories TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-23/gentle-introduction-symme tric-tensor-categories END:VEVENT BEGIN:VEVENT UID:a896f4c8-42c0-47a0-85ae-54eeff7399c3 DTSTAMP:20260617T145208Z CATEGORIES:Meetings\, Seminars\, Student Activities\, Workshops CLASS:PUBLIC CREATED:20260101T215731Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nWeekly event to learn Le an in a collaborative way. There are no prerequisites to participate.  DTSTART;TZID=America/Los_Angeles:20260109T153000 DTEND;TZID=America/Los_Angeles:20260109T173000 LAST-MODIFIED:20260101T221932Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-09/lean-together END:VEVENT BEGIN:VEVENT UID:9a8550ca-fb72-4fe0-9ee4-a2aa62a45550 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260107T164307Z DESCRIPTION:Speaker: Gil Kur (ETH)\n\nWe revisit sharp risk bounds for the minimum-l1-norm interpolant (basis pursuit) in high-dimensional linear reg ression. These bounds were first obtained by Wang\, Donhauser and Yang (20 22) via the Convex Gaus-sian Minimax Theorem (CGMT)\, in an analysis motiv ated by the widely used Gaussian-width and uniform-convergence framework o f Koehler et al. (2021)\; in particular\, their results disprove a conject ure of Chinot\, L ̈offler and van de Geer (2021). In contrast\, our proof does not rely on Gaussian comparison inequalities or CGMT. Instead\, it us es tools from high-dimensional geometry\, superconcentration\, and the geo metry of Gaussian polytopes. We furthermore show that CGMT-based analyses of minimum-norm interpolation can be unexpectedly sensitive to very fine e stimates of auxiliary Gaussian optimization problems\, and we argue that C GMT may not always be the most appropriate tool for studying the mean-squa red error of minimum-norm interpolants. DTSTART;TZID=America/Los_Angeles:20260126T143000 DTEND;TZID=America/Los_Angeles:20260126T153000 LAST-MODIFIED:20260203T003412Z SUMMARY:: On the Convex Gaussian Minimax Theorem and Minimum Norm Interpola tion TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-26/convex-gaussian-minimax-t heorem-and-minimum-norm-interpolation END:VEVENT BEGIN:VEVENT UID:25162da8-371b-4771-b899-907149c5e3da DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260116T221840Z DESCRIPTION:Speaker: Katy Woo\, Stanford University\n\nAbstract: We study t he rational points on the elliptic surface given by the equation: y^2 = x^ 3 + AxQ(u\,v)^2 + BQ(u\,v)^3\, where 4A^3-27B^2 is nonzero and Q(u\,v) is a positive-definite quadratic form. We prove asymptotics for a special sub set of the rational points of increasing height\, specifically those that are integral with respect to the singularity. This method utilizes Mordell 's parameterization of integral points on quadratic twists on elliptic cur ves\, which is based on a syzygy for invariants of binary quartic forms. W e reduce the point-counting problem to the question of determining an asym ptotic formula for the correlation sums of representation numbers of binar y quadratic and binary quartic forms\, where the quartic forms have certai n invariants. These sums are then treated using a connection to modular fo rms. DTSTART;TZID=America/Los_Angeles:20260127T110000 DTEND;TZID=America/Los_Angeles:20260127T115000 LAST-MODIFIED:20260116T221840Z LOCATION:PDL C-401 SUMMARY:: Counting points on a family of degree one del Pezzo surfaces nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-27/counting-points-family-de gree-one-del-pezzo-surfaces-nbsp END:VEVENT BEGIN:VEVENT UID:1a293413-c763-4654-bfcb-6b4891f8f8d0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251118T195201Z DESCRIPTION:Speaker: Matthew Hastings\, Microsoft Research\n\nI will review a topic in mathematical physics\, called Lieb-Robinson bounds\, that exem plifies analysis\, geometry\, and dynamics.  These bounds describe the dyn amics of a physical system of many interacting quantum degrees of freedom: they control how rapidly a disturbance can propagate through the system.  The speed of the propagation depends on the geometry of the system.  Then \, using elementary ideas in analysis\, one can obtain some powerful resul ts on the static properties of the system\, such as decay of correlations or quantization of the Hall conductance.  This will be an introductory tal k with no specific background required. DTSTART;TZID=America/Los_Angeles:20260128T153000 DTEND;TZID=America/Los_Angeles:20260128T163000 LAST-MODIFIED:20260112T172155Z LOCATION:DEN 111 SUMMARY:: Lieb Robinson Bounds and Applications to Quantum Systems How Dyna mics Controls Statics TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-28/lieb-robinson-bounds-and- applications-quantum-systems-how-dynamics-controls END:VEVENT BEGIN:VEVENT UID:46393d29-d71d-4be8-b2cf-fe4ae58ea899 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251215T064204Z DESCRIPTION:Speaker: François Clément\, University of Washington\n\nAbstrac t:The van der Corput and Kronecker sequences are some of the most well-dis tributed sequences of points in [0\,1). In this talk\, I will present some ways to use their regularity\, first to tackle an old problem of Erdos an d de Bruijn (1949) on lengths of consecutive segments\, and then to build some interesting mathematical objects. In two dimensions\, it is less clea r what should be the most uniform point construction. One possible approac h is to study the permutation induced by the relative position of the poin ts. I will present some initial results on the Fibonacci lattice\, before describing an open problem of interest for discrepancy theory.Note: There is no pre-seminar. The main talk starts at 4:10.Join Zoom Meeting: https:/ /washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260128T153000 DTEND;TZID=America/Los_Angeles:20260128T170000 LAST-MODIFIED:20260119T074154Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Applications of Low Discrepancy Sequences TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-28/applications-low-discrepa ncy-sequences END:VEVENT BEGIN:VEVENT UID:6e04d35c-822c-4d2d-8c26-4c442f4fab68 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260127T033417Z DESCRIPTION:Speaker: Jay Reiter\n\nIn this talk\, we'll introduce presentab le \$\infty\$-categories and the \$\infty\$-category \$\mathsf{Pr}^\mathrm {L}\$. After discussing the adjoint functor theorem\, truncation functors\ , and the symmetric monoidal structure on \$\mathsf{Pr}^\mathrm{L}\$\, we' ll focus on stable presentable \$\infty\$-categories\, and discuss stabili zation in \$\mathsf{Pr}^\mathrm{L}\$\, the natural t-structure\, and pre-s table \$\infty\$-categories. DTSTART;TZID=America/Los_Angeles:20260129T103000 DTEND;TZID=America/Los_Angeles:20260129T113000 LAST-MODIFIED:20260127T033435Z LOCATION:SIG 227 SUMMARY:: mathsf Pr mathrm L and stabilization TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-29/mathsf-pr-mathrm-l-and-st abilization END:VEVENT BEGIN:VEVENT UID:d03f7180-45b3-4853-9cbb-49841e4aa9a2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260126T193832Z DESCRIPTION:Speaker: Daniel Rostamloo\, UW\n\nI will give a site-theoretic introduction to prismatic cohomology (and its prerequisite structures) wit h a view toward discussing the Hodge-Tate comparison theorem. DTSTART;TZID=America/Los_Angeles:20260129T150000 DTEND;TZID=America/Los_Angeles:20260129T160000 LAST-MODIFIED:20260126T193832Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Prismatic Cohomology I TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-29/student-ag-seminar-prisma tic-cohomology-i END:VEVENT BEGIN:VEVENT UID:a8b28637-d511-4eb0-915e-31ded2c0d2ac DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260121T195652Z DESCRIPTION:Speaker: Piotr Pstrągowski\, University of Washington\n\nIn hom otopy theory\, one is often interested in classifying maps between shapes which are 'essentially different'\, i.e. which cannot be continuously defo rmed into each other. Even in the most simple of cases\, such as classifyi ng maps between spheres\, this turns out to quickly lead into very deep wa ters.While the answers one obtains can appear chaotic at first glance\, th ey contain many subtle patterns and periodicities\, or the so-called 'musi c of the spheres'. As first discovered by Quillen half a century ago\, the se phenomena are closely related to number theory\, providing a surprising bridge between topology and arithmetic. This talk will be a gentle introd uction to this circle of ideas. DTSTART;TZID=America/Los_Angeles:20260129T163000 DTEND;TZID=America/Los_Angeles:20260129T173000 LAST-MODIFIED:20260128T200624Z LOCATION:PDL C-038 SUMMARY:: Current Topics Seminar What do number theorists know about homoto py groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-29/current-topics-seminar-wh at-do-number-theorists-know-about-homotopy-groups END:VEVENT BEGIN:VEVENT UID:0d3ed058-1e17-462a-b578-6b737bb6b952 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260129T223349Z DESCRIPTION:Speaker: Albert Jinghui Yang\, University of Pennsylvania\n\nIn this talk\, I will discuss the construction of a spectral sequence known as the Bousfield–Kan spectral sequence (BKSS). As an example\, I will brie fly introduce an important tool (my favorite one!) called the descent spec tral sequence\, which is a variant of the BKSS used in computations of THH (topological Hochschild homology) of local fields. Using this technique\, I will outline the idea behind the computation of THH of local fields wit hout carrying out the full calculation. No background in THH will be assum ed. DTSTART;TZID=America/Los_Angeles:20260130T133000 DTEND;TZID=America/Los_Angeles:20260130T143000 LAST-MODIFIED:20260129T223411Z LOCATION:CMU 230 SUMMARY:: DubTop Seminar Bousfield Kan Spectral Sequence TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-30/dubtop-seminar-bousfield- kan-spectral-sequence END:VEVENT BEGIN:VEVENT UID:569a5c20-b414-4ef4-8d10-57b02be37ea6 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260129T231543Z DESCRIPTION:Speaker: Bryan Lu\, University of Washington\n\nIt has been sai d by many a combinatorialist that Y**ng d**gr*ms and Y**ng t*bl***x are in timately connected to the representation theory of the symmetric group. In deed\, (semi-)standard Y**ng t*bl***x index many interesting objects in th e ring of characters of the symmetric group (read: ring of symmetric funct ions)\, but how do you use them to work with the actual representations th emselves? We will explore at least three interesting ways that Y**ng d**gr *ms and Y**ng t*bl***x can be used to describe the irreducible representat ions of the symmetric group. Unfortunately\, I have been cursed with the T aboo condition\, so I will be incapable of saying some of the above words out loud... DTSTART;TZID=America/Los_Angeles:20260130T153000 DTEND;TZID=America/Los_Angeles:20260130T163000 LAST-MODIFIED:20260129T231553Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Making Representations with Y ng T bl x TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-01-30/1-2-3-seminar-making-repr esentations-y-ng-t-bl-x END:VEVENT BEGIN:VEVENT UID:e6685b57-1f7a-4d05-a145-998e5cbfdc17 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260123T235952Z DESCRIPTION:Speaker: Andrew Aguilar\n\nTitle: How to Support Representation TheoristsAbstract: Have you wondered how support theory is used in repres entation theory? Support varieties for modules over a finite group were fi rst defined by Carlson in the 1980’s and was fully utilized in the 1990’s by Benson\, Carlson and Rickard to classify the thick tensor ideals in the stable category. Then in 2005 Balmer’s seminal paper put this classificat ion into the broader context of Tensor Triangular Geometry. After which\, the progress has not stopped\; now aiming towards a similar classification for big categories. In this talk we’ll discuss the necessary background n eeded to understand the current work and how support plays a role. DTSTART;TZID=America/Los_Angeles:20260202T113000 DTEND;TZID=America/Los_Angeles:20260202T123000 LAST-MODIFIED:20260201T214208Z LOCATION:SIG 228 SUMMARY:: StARTS How to Support Representation Theorists TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-02/starts-how-support-repres entation-theorists END:VEVENT BEGIN:VEVENT UID:df336182-fb77-4152-88c0-abe1f603719f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260122T015608Z DESCRIPTION:Speaker: Christopher Hoffman (UW)\n\nIn order to explain self-o rganized criticality Dhar developed a theory of abelian networks that was formalized by Bond and Levine. I will describe this theory and show that i t contains some of the most common mathematical models for self-organized criticality. These models are all believed to have critical exponents. I w ill talk about one particular abelian network known as oil and water. I wi ll explain why I think that it is an abelian network where we have some ch ance of calculating these critical exponents. DTSTART;TZID=America/Los_Angeles:20260202T143000 DTEND;TZID=America/Los_Angeles:20260202T153000 LAST-MODIFIED:20260203T003402Z LOCATION:LOW 117 SUMMARY:: nbsp Abelian Networks TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-02/nbsp-abelian-networks END:VEVENT BEGIN:VEVENT UID:9b0eddf0-6ef3-488b-bd6f-4eaca2c7dff8 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20260114T164839Z DESCRIPTION:Speaker: Pam Kelley Elend\, UW Mathematics\n\nPlease join us fo r an in-person Graduate Student Travel Reimbursement question & answer ses sion with Budget Analyst Pam Kelley Elend on Tuesday\, February 3\, 2026\, from 10:00am to 11:00am in Padelford C-38.Pam will explain the travel rei mbursement process from beginning to end\, and address all the necessary s teps\, documentation\, and deadlines for a complication-free\, timely\, an d complete reimbursement of grad travel expenses. This will be followed by a Q & A period.So come with your questions and join us for refreshments\, information\, and conversation! DTSTART;TZID=America/Los_Angeles:20260203T100000 DTEND;TZID=America/Los_Angeles:20260203T110000 LAST-MODIFIED:20260203T003120Z LOCATION:PDL C-038 SUMMARY:: Grad Travel Reimbursement Q and A TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-03/grad-travel-reimbursement -q-and END:VEVENT BEGIN:VEVENT UID:d8d99b23-e2fc-4c7e-a4c5-17d37b1e52e2 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T000936Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaD iscussion of voting method for remaining AAP hiringCommittee ReportsUnderg raduate - ThomasReport from the GSRNew BusinessExecutive SessionAdjournmen tMINUTESThe regular meeting of the faculty of the Department of Mathematic s was held in HUB 214 at 11am PST\, February 3\, 2026. Max Lieblich\, Chai r\, presided over the meeting. Zawad Chowdhury was the recording secretary .Good News Thomas Rothvoss received Trevisan Prize Soham Ghosh was a final ist for the Jane Street Graduate fellowship Many students who are graduati ng have received great job offers Offers have gone out to 19 admitted grad uate students\, about 20 more on waitlist. Target number is 10\, but might end up with fewer or more. 3 AAP offers went out.  Confident one will be accepted\, less sure about the other two Further offers to be sent out aft er replies on Feb 9th. Comments from the Chair Seems like electronic votes after the meeting do not contradict public access\, will be applied to so me faculty voting items. Merit Materials are due on Feb 19/20 Personnel co mmittee asking for CV\, Narrative Statement\, 3 sentence paragraph. See em ail for more details. Faculty also need collegial evaluations\, as require d by 3 year cycle. No reminders sent this year\, but click on your file to check when it is required. The collegial peer evaluation can be more powe rful than student evaluations. So we should perhaps do it not on an ad hoc basis. Executive committee is planning to start a program to award resear ch stipends during the summer Plan is to award 4k per student\, selected b ased on merit Hoping to award 10-15 this summer Jane street awarded 20k fo r this summer and next\, 5 stipends coming out of that Long term plan migh t involve dipping into connections with other quant firms\, can’t say more about summers beyond 2027 Hope is for 10-15 stipends\, plus 13 instructor jobs\, plus first year TAs and grants to cover a good number of grad stud ents. Different from an RA\, but functionally / logistically same as hourl y summer RA Faculty with grants can use the same mechanism to award stipen ds to students\, at any amount (not just 4k). Announcements – None Consent Agenda – None AAP Hiring There is a 3 way tie between people ranked 4-6\, which must be broken before further offers are made. After some discussio n on voting systems\, it was decided to redo approval voting online to bre ak ties. Got flak from the dean’s office for a faculty member referring to this as a postdoc position. Because there is a specific union contract in volved\, we need to be very careful about how we write or talk about these things. 126 and 224 content committee Headed by Jonah and Chris Burdzy. H ave a plan for curricular changes\, currently being communicated with many stakeholders and approved by faculty vote. Final implementation will cont inue until Spring 2027. Goal of the committee: “124 and 125 are novels\, 1 26 is an anthology of 5 classes”\; can we reduct this to 4 classes? Three proposed changes Move all differentiation content to 126 and all integrati on content to 224 Add Lagrange multipliers Revise Taylor Series section\, reducing emphasis on error bounds We are solely responsible for approving it. But we are also communicating to other departments and UW Tacoma/Bothe ll to reduce bad blood Original plan was to vote after input from other de partments\, but must submit changes by Feb 17th so voting now. Can rediscu ss after input from other departments Concerns were raised about Electrica l Engineering and Mechanical Engineering relying on multivariable integrat ion content. Seems to currently be being met by 224 requirement in those m ajors. 12x Logistics committee Headed by Andy and Natalie Proposing (for f aculty vote) that instructor names become public on time schedule Names we re hidden in the past when we had many smaller sections of classes like 20 7 and 208\, with more grad instructors. Final instructors wouldn’t be sett led until few weeks before quarter\, and did not want to release prelimina ry lists We are the only department that hides names\, makes us look bad t o students and other departments Would redistribute emails about classes t o those actually teaching More from this committee\, coming in the pipelin e: Changes to TA Training\, to be discussed by GPC Piloting Standards base d grading in 120 and 124 this spring (already greenlit by UPC) Plans to re structure quiz sections To solve problems of shrinking grad student pool\, variance in quality of instruction\, variance in attendance based on grad ing scheme. UPC approved idea: larger quiz section with many UTAs and TAs\ , students do coordinated group work. Implementation being finalized. GSR Report Current topics happening only this quarter\, with pizza! Please let us know if you would like to talk at one of the few open spots. Incoming grad students this year will not have a visit day However\, there will be panels to talk with grad students\, and opportunities to meet with a grad  student one-on-one If you are meeting with a prospective student\, please encourage them to talk to grad students using one of those channels Grad s tudents will also direct prospectives to faculty based on their research i nterests. New Business – none Executive Session – started at 12:02\, ended at 12:06. DTSTART;TZID=America/Los_Angeles:20260203T110000 DTEND;TZID=America/Los_Angeles:20260203T120000 LAST-MODIFIED:20260204T214231Z LOCATION:HUB 214 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-03/faculty-meeting END:VEVENT BEGIN:VEVENT UID:022236a4-f148-4075-8dfc-ede30d129036 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260129T025813Z DESCRIPTION:Speaker: Ting Gong\n\nPre-seminar title: Structure and problems in Brauer groupsPre-seminar abstract: There are many perspectives of the Brauer group\, from the classical central simple algebras to gerbes. In th is talk\, I am going to review the associations Brauer group brings togeth er\, and state a few structure theorems and main open problems for Brauer groups.Seminar title: Moduli of vector bundles on gerbes and the period in dex problemSeminar abstract: The period index problem has been suggested b y Colliot-Thélène in early 2000s\, and some of its low dimensional cases h as been solved by de Jong\, Lieblich and more recently Perry-Hotchkiss. We adapt the point of view of moduli of twisted sheaves\, and by combining c lassical results in the theory of moduli of vector bundles\, we were able to prove the period index problem for the 2-torsion Brauer classes on genu s 2 curves over C1 fields\, and derive a bound for those over arbitrary fi elds\, meanwhile shed light to other cases with their moduli structure. DTSTART;TZID=America/Los_Angeles:20260203T133000 DTEND;TZID=America/Los_Angeles:20260203T153000 LAST-MODIFIED:20260129T025813Z LOCATION:PDL C-38 SUMMARY:: Moduli of vector bundles on gerbes and the period index problem TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-03/moduli-vector-bundles-ger bes-and-period-index-problem END:VEVENT BEGIN:VEVENT UID:802b596c-651e-414a-8cf1-e9118c190099 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260201T210959Z DESCRIPTION:Speaker: Jackson Morris\, UW\n\nThe most useful tool available have for computing homotopy groups is the Adams spectral sequence. Based o n HFp\, the E2-page takes a particularly nice form as Ext in the category of comodules over the dual Steenrod algebra. While this is great at comput ing stem by stem data\, it is not so useful at extracting periodic data. O n the other hand\, the BP-based Adams spectral sequence is better at isola ting vn-periodicity\, with the trade-off that its E1-page is much more del icate. At low heights\, we are aided in this analysis by splitting results for BP-cooperations.This talk will investigate analogous questions in mot ivic homotopy theory. We will show that there are spectrum level splitting s of the BPGL- and BPGL-cooperations algebras and how this translates to t he corresponding Adams spectral sequences. Time permitting\, we will discu ss many potential avenues for future directions.  DTSTART;TZID=America/Los_Angeles:20260203T153000 DTEND;TZID=America/Los_Angeles:20260203T163000 LAST-MODIFIED:20260201T211013Z LOCATION:PDL C-401 SUMMARY:: Splittings and periodicity in motivic homotopy theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-03/splittings-and-periodicit y-motivic-homotopy-theory X-ALT-DESC;FMTTYPE=TEXT/HTML:Speaker: Jackson Morris\, UW The most useful t ool available have for computing homotopy groups is the Adams spectral seq uence. Based on HFp\, the E2-page takes a particularly nice form as Ext in the category of comodules over the dual Steenrod algebra. While this is g reat at computing stem by stem data\, it is not so useful at extracting pe riodic data. On the other hand\, the BP-based Adams spectral sequence i s better at isolating vn-periodicity\, with the trade-off that its E1-page is much more delicate. At low heights\, we are aided in this analysis by splitting results for BP-cooperations.This talk will investigate analog ous questions in motivic homotopy theory. We will show that there are spec trum level splittings of the BPGL<0>- and BPGL<1>-cooperations algebras an d how this translates to the corresponding Adams spectral sequences. Time permitting\, we will discuss many potential avenues for future directions.   END:VEVENT BEGIN:VEVENT UID:b7444a49-c14f-44c3-8fe6-4c6560425785 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260112T005855Z DESCRIPTION:Speaker: Stefan Steinerberger\, University of Washington\n\nAbs tract:I will discuss two problems\; one is very old and the other is new.  The first is the 'Opaque Square' problem: if we have a union of line segm ents \$X\$ with the property that every line that intersects the unit squa re \$[0\,1]^2\$ also intersects the set \$X\$\, how long does \$X\$ have t o be?   It has a nice interpretation involving finding buried telephone li nes. There hasn't been very much progress since the PhD thesis of Jones (1 962).  The other problem is recent: if we have a set of points with maxima l distance 1 and there are many pairs of points whose distance is close to maximal\, then there are also many points clustered together\; it should have a simple solution\, I will present an easy-ish intermediate result.No te: The main talk starts at 4:10. There is no pre-seminar.Join Zoom Meetin g: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260204T160000 DTEND;TZID=America/Los_Angeles:20260204T170000 LAST-MODIFIED:20260112T010206Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Two Problems in Geometric Combinatorics TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-04/two-problems-geometric-co mbinatorics END:VEVENT BEGIN:VEVENT UID:5deb361b-9ccb-4843-acee-df69bec66443 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260205T065123Z DESCRIPTION:Speaker: Daniel Rostamloo\n\nI will give an overview of some fu ndamental objects and constructions in derived algebraic geometry\, starti ng from commutative algebra and ending with derived stacks. Time permittin g\, I will discuss the statements of Artin-Lurie and Toën-Vaquié represent ability.  DTSTART;TZID=America/Los_Angeles:20260205T103000 DTEND;TZID=America/Los_Angeles:20260205T113000 LAST-MODIFIED:20260205T065123Z LOCATION:SIG 227 SUMMARY:: Basic objects in DAG II TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-05/basic-objects-dag-ii END:VEVENT BEGIN:VEVENT UID:f0f38ca1-5ee2-4e20-a06c-b447b155432d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260130T035802Z DESCRIPTION:Speaker: Riku Kurama\, University of Michigan\n\nUsing mixed ch aracteristic minimal model program for fourfolds (under an assumption on m ixed characteristic resolution of singularities)\, Hacon and Witaszek prov ed that liftability of Calabi-Yau threefolds in positive characteristic is preserved under birational equivalence. In this talk\, I will explain the joint work in progress with Perry where we unconditionally prove this res ult by extending Bridgeland’s work on threefolds flops. This celebrated wo rk of Bridgeland describes threefold flops over the complex numbers as mod uli spaces of certain complexes of sheaves\, and our work generalizes this description to a relative setting. DTSTART;TZID=America/Los_Angeles:20260205T150000 DTEND;TZID=America/Los_Angeles:20260205T160000 LAST-MODIFIED:20260130T035802Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Flops derived categories and liftability of th reefolds TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-05/student-ag-seminar-flops- derived-categories-and-liftability-threefolds END:VEVENT BEGIN:VEVENT UID:09ea98c2-f5f2-4cd8-b199-80236fe5da57 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20251215T154616Z DESCRIPTION:Speaker: Sébastien Bubeck\, OpenAI\n\nI will review the progres s of large language models for mathematics over the last 3 years\, from ba rely solving high school level mathematics to solving some minor open prob lems in convex optimization\, combinatorics and probability theory. The em phasis will be on trying to identify the shape of the current frontier cap abilities\, as it stands today\, finding out both where it's helpful and w here it's still falling short as a research assistant. DTSTART;TZID=America/Los_Angeles:20260206T153000 DTEND;TZID=America/Los_Angeles:20260206T163000 LAST-MODIFIED:20260120T234111Z LOCATION:PCAR 192 SUMMARY:: Recent advances in LLMs for Mathematics TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-06/recent-advances-llms-math ematics END:VEVENT BEGIN:VEVENT UID:47decd43-a636-4824-8b8a-96651a71dadd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260201T213614Z DESCRIPTION:Speaker: Wolfgang Allred\n\nTitle: Equivariant sheaves through examplesAbstract: We will continue the theme from last time and will study equivariant sheaves from the perspective of representation theory. We wil l begin with some definitions and then spend the rest of the talk working through some examples. DTSTART;TZID=America/Los_Angeles:20260209T113000 DTEND;TZID=America/Los_Angeles:20260209T123000 LAST-MODIFIED:20260201T213741Z LOCATION:SIG 228 SUMMARY:: StARTS Equivariant sheaves through examples TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-09/starts-equivariant-sheave s-through-examples END:VEVENT BEGIN:VEVENT UID:57205469-3066-45a8-b90c-518a4b212186 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260122T015731Z DESCRIPTION:Speaker: Hyojeong Son (UW)\n\nActivated random walk (ARW) is an interacting particle system that is a leading candidate for a rigorous th eory of self-organized criticality. We study one-dimensional ARW on ℤ star ted from a point source n\delta_0\, and prove that uniformly throughout a macroscopic window around the source\, the probability that a given site c ontains a sleeping particle after stabilization is asymptotically the crit ical density \rho_c. Our approach combines a coupling of neighboring one-d imensional IDLA clusters with a reduction of bulk blocks to a driven-dissi pative ARW via boundary flux counts. Joint work with Christopher Hoffman a nd Jacob Richey.  DTSTART;TZID=America/Los_Angeles:20260209T143000 DTEND;TZID=America/Los_Angeles:20260209T153000 LAST-MODIFIED:20260203T220141Z LOCATION:LOW 117 SUMMARY:: Local density of point source activated random walk on TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-09/local-density-point-sourc e-activated-random-walk END:VEVENT BEGIN:VEVENT UID:c7742273-0817-4fce-a054-25eb52afb98a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260209T232724Z DESCRIPTION:Speaker: Philip Engel (UIC)\n\nTitle: E_7 and Calabi-Yau 3-fold s Abstract: Shimura varieties are arithmetic quotients of Hermitian symmet ric domains. Famous examples include (1) the upper half-plane modulo SL_2( Z) parameterizing elliptic curves\, (2) its generalization\, the Siegel up per half-space modulo Sp_{2g}(Z)\, parameterizing principally polarized ab elian varieties of dimension g\, and (3) a certain open subset of a quadri c\, modulo the isometry group of a Z-lattice of signature (2\,n). A Shimur a variety is a moduli space of Hodge structures\, and as such\, carries a tautological 'variation of Hodge structure.' Famously\, variations of Hodg e structures also arise from the relative cohomology of a smooth projectiv e morphism. 'Deligne's rêve' is that\, in fact\, the tautological variatio n of Hodge structure on any Shimura variety comes from geometry.  All thre e of the above examples (1)\, (2)\, (3) embed into A_g and thus in these c ases\, Deligne's rêve is true. To find examples of Shimura varieties which do not embed into A_g one must look at more exotic/exceptional cases. Att ached to the simple Lie group E_7 are some such exceptional Shimura variet ies. Not a single VHS on an E_7 Shimura variety is known to come from geom etry.  In this talk\, I will propose one possible approach to finding this mythical geometric family\, which induces a variation of Hodge structure of E_7 Shimura type. This talk will be very speculative. DTSTART;TZID=America/Los_Angeles:20260210T134500 DTEND;TZID=America/Los_Angeles:20260210T153000 LAST-MODIFIED:20260209T232724Z LOCATION:PDL C-38 SUMMARY:: nbsp E 7 and Calabi Yau 3 folds TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-10/nbsp-e-7-and-calabi-yau-3 -folds END:VEVENT BEGIN:VEVENT UID:f2dc99fd-f4b6-45ea-8825-c811b54d1310 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260120T025638Z DTSTART;TZID=America/Los_Angeles:20260210T153000 DTEND;TZID=America/Los_Angeles:20260210T163000 LAST-MODIFIED:20260120T025649Z LOCATION:PDL C-401 SUMMARY:: TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-10/tba END:VEVENT BEGIN:VEVENT UID:16b27e1f-261f-4391-abaf-8d7fbd00455f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260122T011720Z DESCRIPTION:Speaker: Alex Rodriguez (SUNY Stony Brook)\n\nAbstract: Given a Jordan curve in the plane\, we can associate a circle homeomorphism (conf ormal welding) via the conformal welding correspondence. These homeomorphi sms arise naturally in Teichmuller theory\, Mathematical physics and dynam ics. In this talk\, we will study this correspondence and we will show tha t given a flexible curve there is a homeomorphism of the plane\, conformal off the curve\, that maps the curve to positive area. We will also state a more general result involving Hausdorff dimension and explain connection s to some open problems. DTSTART;TZID=America/Los_Angeles:20260211T153000 DTEND;TZID=America/Los_Angeles:20260211T163000 LAST-MODIFIED:20260206T042334Z LOCATION:DEN 111 SUMMARY:: Conformal welding and flexible curves TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-11/conformal-welding-and-fle xible-curves END:VEVENT BEGIN:VEVENT UID:78877621-8e0b-44be-af8e-b9698846fb32 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260208T053509Z DESCRIPTION:Abstract:This seminar will feature open problems presented by U W faculty and graduate students: Gaku Liu\, Isabella Novik\, Varun Shah\, Michael Tang\, Zawad Chowdhury\, Dan Guyer\, Josh Hinman.Note: There will be no preseminar. The session starts at 4:10.Join Zoom Meeting: https://wa shington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260211T153000 DTEND;TZID=America/Los_Angeles:20260211T170000 LAST-MODIFIED:20260208T053509Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Open problems session TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-11/open-problems-session END:VEVENT BEGIN:VEVENT UID:168edb84-b5d3-46c0-9014-90f3723c2a64 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260212T092756Z DESCRIPTION:Speaker: Ting Gong\n\nWe tie up the loose ends so far\, and int roduce perfects stacks and finite objects in categories. Finally\, we intr oduce tensor products in the category of stable compactly generated presen table O_x linear infinity categories.  DTSTART;TZID=America/Los_Angeles:20260212T103000 DTEND;TZID=America/Los_Angeles:20260212T113000 LAST-MODIFIED:20260212T092756Z LOCATION:Sieg 227 SUMMARY:: Perfect stacks and tensor products TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-12/perfect-stacks-and-tensor -products END:VEVENT BEGIN:VEVENT UID:bd1806f6-1af7-4ca5-b17d-05f2ea8c9feb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260121T200108Z DESCRIPTION:Speaker: Farbod Shokrieh\, University of Washington\n\nI will e xplain some interplay between non-archimedean/tropical geometry\, number t heory\, and combinatorics. I will also give some applications to the theor y of heights on abelian varieties. In the case of Jacobians\, these relate to combinatorics\, convex geometry\, and potential theory (electrical net work) of metric graphs. (Needless to say\, the talk will be 'self-containe d'.) DTSTART;TZID=America/Los_Angeles:20260212T163000 DTEND;TZID=America/Los_Angeles:20260212T173000 LAST-MODIFIED:20260212T191552Z LOCATION:PDL C-038 SUMMARY:: Current Topics Seminar Berkovich spaces and number theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-12/current-topics-seminar-be rkovich-spaces-and-number-theory END:VEVENT BEGIN:VEVENT UID:181d54de-0ef6-44e4-af3a-8d7cc1157d2d DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260129T232707Z DESCRIPTION:Speaker: Michael Zeng\, University of Washington\n\n(This talk will be given as a Socratic Seminar.) - How many roots does a polynomial h ave over the complex numbers? How about over the reals? Over any field?- H ow many circles are simultaneously tangent to 3 circles in the plane\, ove r C? How about over R? Over k?- How many lines simultaneously meet 4 skew lines in 3-space?- How many lines are there on a smooth cubic surface in 3 -space? How many different types of lines are there?- How many lines are t here in a pencil of quartic surfaces in 3-space? What are the types of the se lines?- How many genus 1 curves are there on a (3\,3)-Calabi-Yau threef old in 5-space?- How do we know for sure???  DTSTART;TZID=America/Los_Angeles:20260213T153000 DTEND;TZID=America/Los_Angeles:20260213T163000 LAST-MODIFIED:20260211T193520Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Fantastic shapes and how to count them TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-13/1-2-3-seminar-fantastic-s hapes-and-how-count-them END:VEVENT BEGIN:VEVENT UID:48c069b4-c48f-4ee5-a7a9-e8dee89fe9c1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260212T185519Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nA weekly meeting for peo ple interested in Lean. We do hands-on exercises and small demos. Topics i nclude:theorem proving in Leanmeta-programming in Leangeneral-purpose prog ramming in Lean DTSTART;TZID=America/Los_Angeles:20260213T153000 DTEND;TZID=America/Los_Angeles:20260213T170000 LAST-MODIFIED:20260212T190040Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-13/lean-together END:VEVENT BEGIN:VEVENT UID:c1dc03b7-7466-4860-866a-95a5715d3b97 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260213T025424Z DESCRIPTION:Speaker: Joe Foster (U Oregon)\n\nTitle: Moduli spaces of sheav es on Weil-type abelian fourfolds Abstract: Generalized Kummer varieties c onstitute one of the two known examples of compact hyper-Kaehler varieties that occur in each even complex dimension. They are constructed as albane se fibers of moduli spaces of sheaves on an abelian surface. However\, the y exhibit more deformations than the underlying abelian surface. Remarkabl y\, these 'hidden' deformations of generalized Kummer varieties are encode d in the deformation theory of Weil-type abelian fourfolds with discrimina nt one. This behooves the study of moduli spaces of sheaves on Weil-type a belian fourfolds with the objective of recovering a complete family of gen eralized Kummer varieties.  In this talk\, I will describe a construction of such moduli spaces.  As a corollary\, we provide a novel proof of the H odge conjecture for Weil-type abelian fourfolds of discriminant one. This work is joint with Nicolas Addington.  Pre-seminar:  I will provide an int roduction to the theory of compact hyper-Kaehler (or irreducible holomorph ic symplectic) varieties of generalized Kummer deformation type\, with an eye towards the relationship between their deformation theory and the defo rmation theory of abelian varieties.  DTSTART;TZID=America/Los_Angeles:20260217T134500 DTEND;TZID=America/Los_Angeles:20260217T153000 LAST-MODIFIED:20260213T025424Z LOCATION:PDL C-38 SUMMARY:: Moduli spaces of sheaves on Weil type abelian fourfolds TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-17/moduli-spaces-sheaves-wei l-type-abelian-fourfolds END:VEVENT BEGIN:VEVENT UID:3c82cd11-bb62-4c03-9199-d5715549f776 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260128T205006Z DESCRIPTION:Speaker: Dan Mikulincer (UW)\n\nWe will review different notion s of anti-concentration\, arising from geometry\, analysis\, and probabili ty. One focus of the talk will be on understanding how these definitions r elate to each other\, sometimes leading to surprising and nontrivial conse quences. The other focus of the talk will be on potential applications\, m aybe even involving some dynamics if time allows. DTSTART;TZID=America/Los_Angeles:20260218T153000 DTEND;TZID=America/Los_Angeles:20260218T163000 LAST-MODIFIED:20260213T173913Z LOCATION:DEN 111 SUMMARY:: Anti concentration from small ball estimates to Fourier decay TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-18/anti-concentration-small- ball-estimates-fourier-decay END:VEVENT BEGIN:VEVENT UID:f28fdd4c-d090-4f31-94d9-3c3f537c3c2e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260112T011233Z DESCRIPTION:Speaker: Grace O'Brien\, University of Washington\n\nAbstract:G iven a directed\, acyclic graph \$G\$ with capacity 1 on every edge and ne tflow vector \$a\$\, the set of all flows of value 1 under \$a\$ in \$G\$ forms a polytope\, \$\mathcal{F}_G(a)\$\, which we call a flow polytope. W hen considering the unit flow vector \$a = (-1\,0\,\dots\,0\,1)\$\, the ve rtices of \$\mathcal{F}_G(-1\,0\,\dots\,0\,1)\$ correspond with the routes from source to sink in \$G\$\, allowing us to form a connection between g raphs and convex geometry. In this talk\, we note that a graph is simply a 1-dimensional simplicial complex and consider how we can generalize flow polytopes to this setting. For a pure \$d\$-dimensional simplicial complex \$X\$\, we define an analogous \$\mathcal{F}_X(a)\$ and study properties of these so-called higher flow polytopes. This talk is based on joint work with Rupert Li.Note: This talk begins with a pre-seminar (aimed at gradua te students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260218T153000 DTEND;TZID=America/Los_Angeles:20260218T170000 LAST-MODIFIED:20260210T183614Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Higher Flow Polytopes A Generalization to Simplicial Complexes TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-18/higher-flow-polytopes-gen eralization-simplicial-complexes END:VEVENT BEGIN:VEVENT UID:2e3b6044-c8ff-427c-a707-a2163e58ea8d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251124T232823Z DESCRIPTION:Speaker: Longzhi Lin (UCSC)\n\nIn this talk\, we first review e nergy convexity results for weakly harmonic and biharmonic maps\, and then present a recent joint work with Da Rong Cheng and Xin Zhou on a convexit y property of the energy functional for surfaces of prescribed mean curvat ure (H-surfaces) in R^3 with prescribed Dirichlet boundary data\, yielding quantitative uniqueness. We also discuss energy convexity along the heat flow for H-surfaces in R^3 under a small initial Dirichlet energy assumpti on\, leading to new results on the existence of weak solutions\, long-time existence\, and uniform convergence to a solution of the H-surface system with prescribed boundary conditions. DTSTART;TZID=America/Los_Angeles:20260218T163000 DTEND;TZID=America/Los_Angeles:20260218T173000 LAST-MODIFIED:20260212T174426Z LOCATION:PDL C-038 SUMMARY:: Energy Convexity for Harmonic and Biharmonic Maps and H Surfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-18/energy-convexity-harmonic -and-biharmonic-maps-and-h-surfaces END:VEVENT BEGIN:VEVENT UID:8bdfb551-f3d1-47cb-b80d-31708d665d26 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260217T193317Z DESCRIPTION:Speaker: Soham Ghosh\, UW\n\nProjective space and hyperquadrics are amongst the simplest smooth projective varieties\, and characterizing them has been a long studied problem. In this talk\, I will provide an ac count of the existing results due to Mori\, Wahl\, Andreatta-Wiśniewski\, Kobayashi-Ochiai\, Araujo-Druel-Kovács\, with particular emphasis on a res ult due to Druel and Paris. Furthermore\, I will derive a new characteriza tion of projective space and hyperquadrics\, conjectured by Kovács\, unify ing  the above characterizations. DTSTART;TZID=America/Los_Angeles:20260219T150000 DTEND;TZID=America/Los_Angeles:20260219T160000 LAST-MODIFIED:20260217T193326Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Characterization of projective space and hyper quadrics TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-19/student-ag-seminar-charac terization-projective-space-and-hyperquadrics END:VEVENT BEGIN:VEVENT UID:dc6962ad-72f6-4332-b894-8f0c51869503 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260121T195806Z DESCRIPTION:Speaker: Alexis Drouot\, University of Washington\n\nQuantum sp in systems are fundamental models of physics that describe magnetism\, man y-body problems and quantum computer hardware. Because their complexity gr ows exponentially with system size\, brute-force analysis tends to fail. R esearchers have relied instead on mathematical techniques that aim to desc ribe the most probable states of these systems. In this talk\, I will revi ew groundbreaking developments in the 2000's that exploited propagation bo unds to derive spectral results. No prerequisite other than linear algebra will be assumed.  DTSTART;TZID=America/Los_Angeles:20260219T163000 DTEND;TZID=America/Los_Angeles:20260219T173000 LAST-MODIFIED:20260213T174222Z LOCATION:PDL C-038 SUMMARY:: Current Topics Seminar Up down and all around A gentle introducti on to quantum spins systems nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-19/current-topics-seminar-do wn-and-all-around-gentle-introduction-quantum-spins END:VEVENT BEGIN:VEVENT UID:f50874b6-9189-4ec9-b4f1-fac3628b627a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250728T150021Z DESCRIPTION:Speaker: Emilie Purvine\, Pacific Northwest National Lab\n\nRea l-world systems—from academic collaborations and computer networks to biol ogical systems and power grids—are often large\, heterogeneous\, and highl y interconnected. A first step towards understanding these systems is choo sing an appropriate mathematical model. At Pacific Northwest National Labo ratory\, we model such systems using graphs\, hypergraphs\, geometric and topological frameworks. In this talk I will give a broad overview of these representations of complex data\, how we analyze these models to gain new insights\, and how we use those insights to impact real-world domains. I will also discuss how these mathematical structures interface with modern machine learning methods. DTSTART;TZID=America/Los_Angeles:20260220T153000 DTEND;TZID=America/Los_Angeles:20260220T163000 LAST-MODIFIED:20260226T181716Z LOCATION:ECE 125 SUMMARY:: Complex mathematical models of data TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-20/complex-mathematical-mode ls-data END:VEVENT BEGIN:VEVENT UID:48c069b4-c48f-4ee5-a7a9-e8dee89fe9c1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260212T185519Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nA weekly meeting for peo ple interested in Lean. We do hands-on exercises and small demos. Topics i nclude:theorem proving in Leanmeta-programming in Leangeneral-purpose prog ramming in Lean DTSTART;TZID=America/Los_Angeles:20260213T153000 DTEND;TZID=America/Los_Angeles:20260213T170000 LAST-MODIFIED:20260212T190040Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-13/lean-together END:VEVENT BEGIN:VEVENT UID:f041e34e-c667-4932-b242-7d59bc1f369e DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260129T232646Z DESCRIPTION:Speaker: Ting Gong\, University of Washington\n\nI will provide a worksheet about Brauer groups and we will work on it and talk about it. Depending on your level of knowledge you can pick what problems to solve but there are always problems to solve regardless of your knowledge.  DTSTART;TZID=America/Los_Angeles:20260220T153000 DTEND;TZID=America/Los_Angeles:20260220T163000 LAST-MODIFIED:20260212T215058Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Quiz section for Brauer groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-20/1-2-3-seminar-quiz-sectio n-brauer-groups END:VEVENT BEGIN:VEVENT UID:1837bd6a-2eb3-4858-9613-6d19c650160a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260218T212342Z DESCRIPTION:Speaker: Ting Gong\n\nTitle: Unramified cohomology and Noether' s problemAbstract: We will define unramified cohomology\, talk about how i t interacts with rationality and Noether's problem. And we shall see the s pirit of representation theory floating around while we try to capture it. DTSTART;TZID=America/Los_Angeles:20260223T113000 DTEND;TZID=America/Los_Angeles:20260223T123000 LAST-MODIFIED:20260218T212528Z LOCATION:SIG 228 SUMMARY:: StARTS Unramified cohomology and Noether s problem TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-23/starts-unramified-cohomol ogy-and-noether-s-problem END:VEVENT BEGIN:VEVENT UID:4a0cca78-fb9f-4565-8ea1-d809eff2e065 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260107T035531Z DTSTART;TZID=America/Los_Angeles:20260223T143000 DTEND;TZID=America/Los_Angeles:20260223T153000 LAST-MODIFIED:20260203T003316Z LOCATION:LOW 117 SUMMARY:: TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-23/tba END:VEVENT BEGIN:VEVENT UID:aad756d9-8c8b-4e51-a70c-c4173afce471 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260220T231106Z DESCRIPTION:Speaker: Piotr Pstrągowski\, University of Washington\n\nThe pl ethora of connections between stable homotopy theory and number theory go back over half a century\, starting with Quillen's discovery of the 'chrom atic picture'. In recent years\, this link has grown even stronger\, with methods of p-adic Hodge theory finding applications to calculation of alge braic K-theory and vice versa\, leading to major advances on both sides. T his talk will be a gentle introduction to these phenomena.   DTSTART;TZID=America/Los_Angeles:20260224T110000 DTEND;TZID=America/Los_Angeles:20260224T115000 LAST-MODIFIED:20260221T184027Z LOCATION:PDL C-401 SUMMARY:: The arithmetic of spheres TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-24/arithmetic-spheres END:VEVENT BEGIN:VEVENT UID:9a70967d-8ca3-4f3c-b445-a013877644f0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260120T025804Z DESCRIPTION:Speaker: Peter Haine\, USC\n\nLet X be a locally topologically noetherian scheme. In their paper on the proétale topology\, Bhatt and Sch olze defined the proétale fundamental group π1proét(X). The profinite comp letion of  π1proét(X) recovers the usual étale fundamental group. Moreover \, π1proét(X) agrees with π1ét(X) when X is normal\, but π1proét(X) has th e better property that it classifies Qp-local systems. In a completely dif ferent setting\, given a complete first-order theory T\, Lascar defined a topological group GalL(T) that plays the role of the absolute Galois group of T. The original definitions of these two topological groups are very d ifferent\; in this talk\, we’ll explain why they’re both essentially speci al cases of the same construction. Namely\, these invariants are both fund amental groups of a naturally-arising condensed homotopy type. In the alge bra-geometric setting\, this is joint work with Holzschuh\, Lara\, Mair\, Martini\, and Wolf. The relationship to the Lascar group is joint with Dam aj and Zhang.  DTSTART;TZID=America/Los_Angeles:20260224T153000 DTEND;TZID=America/Los_Angeles:20260224T163000 LAST-MODIFIED:20260219T182834Z LOCATION:PDL C-401 SUMMARY:: The pro tale fundamental group amp the Lascar group TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-24/pro-tale-fundamental-grou p-amp-lascar-group END:VEVENT BEGIN:VEVENT UID:4c7975b3-0ed1-444c-9ea4-9dbc3f4bc30d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251215T064324Z DESCRIPTION:Speaker: Hailun Zheng\, University of Hawai'i\n\nAbstract:The G eneralized Lower Bound Theorem states that the \$g\$-numbers of any simpli cial \$(d-1)\$-sphere are nonnegative. Moreover\, equality \$g_i = 0\$ hol ds for some \$1 \le i \le d/2\$ if and only if the sphere is \$(i-1)\$-sta cked. Such a sphere must have missing faces in dimension greater than \$d- i\$. This naturally leads to the following question: what lower bounds can be established for the \$g\$-numbers of simplicial spheres with no large missing faces?In this talk\, I will discuss several open problems related to this question and describe recent progress. A central tool in our appro ach is stress theory\; I will explain how stress spaces can be used to der ive lower bounds on the \$g\$-numbers. As an application\, I will present a complete characterization of simplicial \$5\$-spheres with no missing fa ces of dimension \$>3\$ that satisfy \$g_3 = 1\$. This is joint work with Isabella Novik.Note: This talk begins with a pre-seminar (aimed at graduat e students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260225T153000 DTEND;TZID=America/Los_Angeles:20260225T170000 LAST-MODIFIED:20260211T203111Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: The lower bound problems for simplicial spheres with no large mis sing faces TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-25/lower-bound-problems-simp licial-spheres-no-large-missing-faces END:VEVENT BEGIN:VEVENT UID:f1da49e6-5329-460c-bc7c-ba8b691d262e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251118T195045Z DESCRIPTION:Speaker: Sebastien Picard\, University of British Columbia\n\nW e discuss a differential geometric construction of distinguished holomorph ic 2-spheres inside a K3 surface. These 2-spheres degenerate to a line on an affine 3-manifold. The example illustrates a general principle in the S YZ program\, where graphs on an affine space B should correspond to limits of calibrated submanifolds along a sequence of compact Ricci-flat manifol ds collapsing to B. This is joint work with Federico Trinca. DTSTART;TZID=America/Los_Angeles:20260225T153000 DTEND;TZID=America/Los_Angeles:20260225T163000 LAST-MODIFIED:20260115T162649Z LOCATION:DEN 111 SUMMARY:: A gluing construction for holomorphic spheres TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-25/gluing-construction-holom orphic-spheres END:VEVENT BEGIN:VEVENT UID:5b4e54c1-5a5e-45be-be9f-e937b7cdc093 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260225T045026Z DESCRIPTION:Speaker: Preston Cranford\, Northwestern University\n\nI will i ntroduce prismatic cohomology of commutative ring spectra via the even fil tration. If time permits\, I'll discuss how the even filtration recovers c onstructions from classical algebra. DTSTART;TZID=America/Los_Angeles:20260226T150000 DTEND;TZID=America/Los_Angeles:20260226T160000 LAST-MODIFIED:20260225T045026Z LOCATION:PDL C-401 SUMMARY:: Prismatic Cohomology of Ring Spectra TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-26/prismatic-cohomology-ring -spectra END:VEVENT BEGIN:VEVENT UID:2de35cff-e3ba-4041-898e-10bb05b61230 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260121T200314Z DESCRIPTION:Speaker: Gabriel Paternain\, University of Washington\n\nI will describe how to attach a complex surface to any Riemannian metric on a su rface so that its complex geometry is closely linked to the geodesic flow of the surface. In the last few years\, these complex surfaces have become a useful device to organise and reinterpret various rigidity questions ar ising in geometric inverse problems and dynamics. DTSTART;TZID=America/Los_Angeles:20260226T170000 DTEND;TZID=America/Los_Angeles:20260226T180000 LAST-MODIFIED:20260224T071217Z LOCATION:PDL C-038 SUMMARY:: Current Topics Seminar How nbsp to nbsp complexify nbsp the nbsp geodesic nbsp flow nbsp of a surface TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-26/current-topics-seminar-ho w-nbsp-nbsp-complexify-nbsp-nbsp-geodesic-nbsp-flow-nbsp END:VEVENT BEGIN:VEVENT UID:a183dbe3-d982-4799-aa18-79465b3774fb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260225T184029Z DESCRIPTION:Speaker: Ting Gong\, UW\n\nWe will explain the paper by Larson and Vakil on Bott periodicity from approximation by using algebraic geomet ric objects. In particular\, we are going to discuss its relation to motiv ic homotopy theory and how the techniques of Larson and Vakil are supporte d in the algebraic topology setting.  DTSTART;TZID=America/Los_Angeles:20260227T133000 DTEND;TZID=America/Los_Angeles:20260227T143000 LAST-MODIFIED:20260225T184029Z LOCATION:CMU 230 SUMMARY:: DubTop Seminar Bott periodicity in algebraic geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-27/dubtop-seminar-bott-perio dicity-algebraic-geometry END:VEVENT BEGIN:VEVENT UID:48c069b4-c48f-4ee5-a7a9-e8dee89fe9c1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260212T185519Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nA weekly meeting for peo ple interested in Lean. We do hands-on exercises and small demos. Topics i nclude:theorem proving in Leanmeta-programming in Leangeneral-purpose prog ramming in Lean DTSTART;TZID=America/Los_Angeles:20260213T153000 DTEND;TZID=America/Los_Angeles:20260213T170000 LAST-MODIFIED:20260212T190040Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-13/lean-together END:VEVENT BEGIN:VEVENT UID:171886ae-e7d4-4a94-b278-de8d3725f333 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260129T232625Z DESCRIPTION:Speaker: Haocheng Cai\, University of Washington\n\nAttach a re al number to a mathematical object. If we are careful\, we can get an 'if and only if' statement of a property of the object in terms of whether a c ertain threshold value is reached. e.g. attach a number representing the e ffort spent and find a threshold value for completion of the PhD. The thre sholds vary for different p (person/ characteristic). We will investigate two thresholds for singularities\, log canonical threshold in characterist ic 0 and F-pure threshold in prime characteristic p. We will use them to r ate the badness of the singularities of a polynomial or an ideal\, and com pute some examples.  DTSTART;TZID=America/Los_Angeles:20260227T153000 DTEND;TZID=America/Los_Angeles:20260227T163000 LAST-MODIFIED:20260225T010346Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Measuring singularities in char 0 and p via thresho lds TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-27/1-2-3-seminar-measuring-s ingularities-char-0-and-p-thresholds END:VEVENT BEGIN:VEVENT UID:902fb50a-5ef6-4be3-9dcf-7dc83bcea07d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260109T213155Z DESCRIPTION:Speaker: François Clément (UW)\n\nSuppose we have already sampl ed n points according to some distribution\, and want to sample n more acc ording to (potentially) another distribution. How efficiently can we compu te the future points and  ' correct' the distribution? In this talk\, I wi ll present a Wasserstein W_1 metric based approach in one dimension that c omputes the next point in linear time\, while being empirically extremely robust. I will also present a continuous version that allows for a better theoretical analysis of the process.  DTSTART;TZID=America/Los_Angeles:20260302T143000 DTEND;TZID=America/Los_Angeles:20260302T153000 LAST-MODIFIED:20260227T230713Z LOCATION:LOW 117 SUMMARY:: Robust Online Sampling from Possibly Moving Target Distributions TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-02/robust-online-sampling-po ssibly-moving-target-distributions END:VEVENT BEGIN:VEVENT UID:3025ac59-4dc9-4888-8d43-b5bdb8c979c3 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T000949Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsCollege Council by-law update vote - LovelessConsent AgendaCommittee ReportsReport from t he GSRNew BusinessExecutive SessionAdjournment DTSTART;TZID=America/Los_Angeles:20260303T110000 DTEND;TZID=America/Los_Angeles:20260303T120000 LAST-MODIFIED:20260226T175444Z LOCATION:HUB 340 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-03/faculty-meeting END:VEVENT BEGIN:VEVENT UID:82646073-cd9a-42f9-99ca-961856083abe DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260225T204845Z DESCRIPTION:Speaker: Preston Cranford\, Northwestern\n\nThe Hopkins-Mahowal d theorem realizes F_2 as an E_2-Thom spectrum. We will discuss generalize d Thom spectra and how to view F_2\, Z\, and ku as E_3-MU-Thom spectra. As a consequence\, we can recover the calculation of THH(F_2)\, with comulti plicative structure\, by studying descent along the map to THH(F_2/MU). DTSTART;TZID=America/Los_Angeles:20260303T153000 DTEND;TZID=America/Los_Angeles:20260303T163000 LAST-MODIFIED:20260225T204902Z LOCATION:PDL C-401 SUMMARY:: E 3 MU Thom Spectra TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-03/e-3-mu-thom-spectra END:VEVENT BEGIN:VEVENT UID:52bf1a53-ac95-43c2-8cb3-2b8c8f89a63a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260205T234158Z DESCRIPTION:Speaker: Mark Skandera\, Lehigh University\n\nAbstract:The Kazh dan-Lusztig basis \$\{C'_w \mid w \in S_n\}\$ of the Hecke algebra \$H_n\$ is related to the natural basis \$\{T_v \mid v \in S_n\}\$ of \$H_n\$ by a matrix whose entries are recursively-defined polynomials \$\{P_{v\,w}(q) \mid v\,w \in S_n\}\$ in \$\mathbf N[q]\$ known as the Kazhdan-Lusztig po lynomials. No known combinatorial formula interprets the coefficients of t hese polynomials as set cardinalities.  Nevertheless\, some results which depend upon pattern avoidance in the permutation \$w\$ permit one to facto r the Kazhdan-Lusztig basis element \$C'_w\$ in a way which provides combi natorial formulas for coefficients of the polynomials \$\{P_{v\,w}(q) \mid v \in S_n\}\$ having second index \$w\$.  No characterization of the perm utations \$w\$ permitting such a factorization is known. We present a nega tive result: conditions on \$w\$ which imply that such a factorization doe s not exist. Note: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: ht tps://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260304T153000 DTEND;TZID=America/Los_Angeles:20260304T170000 LAST-MODIFIED:20260205T234245Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: On the impossibility of parabolic factorization of certain Kazhda n Lusztig basis elements TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-04/impossibility-parabolic-f actorization-certain-kazhdan-lusztig-basis-elements END:VEVENT BEGIN:VEVENT UID:9e18dd68-bd5a-4137-96d7-11f1187ecf9d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251204T220904Z DESCRIPTION:Speaker: Andras Vasy (Stanford University)\n\nAbstract:I will d iscuss a microlocal analysis approach to spectral theory on asymptotically Minkowski spaces both for scalar wave operators and also for Dirac type o perators. This in turn gives rise to complex powers of the operators\, all owing for the analysis of a spectral zeta function\, relating its residues to geometric information. This is joint work with Nguyen Viet Dang and Mi chal Wrochna\, with ongoing work on extensions also with Mikhail Molodyk. DTSTART;TZID=America/Los_Angeles:20260304T153000 DTEND;TZID=America/Los_Angeles:20260304T163000 LAST-MODIFIED:20260217T233317Z LOCATION:DEN 111 SUMMARY:: Spectral theory for Dirac type operators on asymptotically Minkow ski spaces and the spectral action principle in Lorentzian signature TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-04/spectral-theory-dirac-typ e-operators-asymptotically-minkowski-spaces-and-spectral END:VEVENT BEGIN:VEVENT UID:545c0beb-cb8b-4aa9-a8a9-da0420d31b07 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260304T184428Z DESCRIPTION:Speaker: Manyi Guo (UW)\n\nFirst introduced for chain complexes \, Décalage “turns the page” of a spectral sequence and has since been gen eralized to cosimplicial objects and filtered spectra. We start with a cos implicial spectrum \$X^\bullet\$ and filters its totalization via levelwis e connective covers (equivalently\, by totalizing the Whitehead tower)\, o btaining a filtered spectrum whose \$\mathrm{Tot}\$ spectral sequence is s hifted forward: \$E_r(\mathrm{D\acute ec}^\Delta X^\bullet)\cong E_{r+1}(X ^\bullet)\$. I will outline this construction\, explain the page-shifting\ , and (if time permits) discuss applications to comparisons of spectral se quences including Adams–Novikov and slice filtrations. DTSTART;TZID=America/Los_Angeles:20260306T133000 DTEND;TZID=America/Los_Angeles:20260306T143000 LAST-MODIFIED:20260304T185218Z LOCATION:CMU 230 SUMMARY:: DubTop Seminar D calage TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-06/dubtop-seminar-d-calage END:VEVENT BEGIN:VEVENT UID:c87a0d34-33a8-4549-b9d4-73024450c564 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260129T232606Z DTSTART;TZID=America/Los_Angeles:20260306T153000 DTEND;TZID=America/Los_Angeles:20260306T163000 LAST-MODIFIED:20260129T232613Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Jay Reiter Title TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-06/1-2-3-seminar-jay-reiter- title-tba END:VEVENT BEGIN:VEVENT UID:48c069b4-c48f-4ee5-a7a9-e8dee89fe9c1 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260212T185519Z DESCRIPTION:Speaker: Vasily Ilin\, Dhruv Bhatia\n\nA weekly meeting for peo ple interested in Lean. We do hands-on exercises and small demos. Topics i nclude:theorem proving in Leanmeta-programming in Leangeneral-purpose prog ramming in Lean DTSTART;TZID=America/Los_Angeles:20260213T153000 DTEND;TZID=America/Los_Angeles:20260213T170000 LAST-MODIFIED:20260212T190040Z LOCATION:CMU B-006 SUMMARY:: Lean Together TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-02-13/lean-together END:VEVENT BEGIN:VEVENT UID:e754f687-5318-4d85-b7bb-6c50a3cf5309 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260305T235623Z DESCRIPTION:Speaker: Cameron Wright\n\nTitle: Homological Algebra in Non-Ab elian ContextsAbstract: After a brief review of abelian categories\, we ex amine exact categories and some aspects of their homological algebra. In p articular\, we consider complexes and the construction of the derived cate gory\, emphasizing the fundamental pieces of machinery that allow for this construction. Subsequently\, we move on to see some examples of homologic al algebra in non-additive settings\, where we will see that some of our f avorite toys are now broken. We then survey some approaches to remedying t he situation. This final portion has connections with tropical geometry\, F1-geometry\, and matroid theory.  DTSTART;TZID=America/Los_Angeles:20260309T113000 DTEND;TZID=America/Los_Angeles:20260309T123000 LAST-MODIFIED:20260306T001303Z LOCATION:SIG 228 SUMMARY:: StARTS Homological Algebra in Non Abelian Contexts TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-09/starts-homological-algebr a-non-abelian-contexts END:VEVENT BEGIN:VEVENT UID:7f2f26d0-3cff-4a5e-83cf-3c74fa9b88ba DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260227T231753Z DESCRIPTION:Speaker: Krzysztof Burdzy (UW)\n\nThe following model was propo sed by Stefan Steinerberger.Consider the convex hull of a collection of di sjoint open discs withidentical radii. The boundary of the convex hull con sists of a finitenumber of line segments and arcs. Randomly (uniformly) ch oose a pointin one of the arcs in the boundary. Attach a new disc at the c hosenpoint so that it is outside of the convex hull and tangential to itsb oundary. Replace the original convex hull with the convex hull of allpreex isting discs and the new disc. Continue in the same manner.Simulations sho w that disc clusters form long\, straight\, or slightlycurved filaments wi th many small side branches and occasionalmacroscopic side branches. For a large number of discs\, the shape ofthe convex hull is either an equilate ral triangle or a quadrangle.Side branches play the role analogous to aval anches in sandpilemodels\, one of the best-known examples of self-organize d criticality(SOC).  Simulation and theoretical results indicate that the size of abranch obeys a power law\, as expected of avalanches in sandpile modelsand similar ``catastrophes'' in other SOC models. DTSTART;TZID=America/Los_Angeles:20260309T143000 DTEND;TZID=America/Los_Angeles:20260309T153000 LAST-MODIFIED:20260227T231753Z LOCATION:LOW 117 SUMMARY:: Ballistic aggregation displays self organized criticality TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-09/ballistic-aggregation-dis plays-self-organized-criticality END:VEVENT BEGIN:VEVENT UID:b14ea63b-d66a-4d62-bc91-45fafcd1deea DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260305T195130Z DESCRIPTION:Speaker: Lori Watson\, Trinity College\n\nIsogenous elliptic cu rves defined over a number field have the same conductor\; however\, their minimal discriminant ideals may differ. When two (cyclic) isogenous ellip tic curves also have the same minimal discriminant ideal we say that they are discriminant ideal twins. In this talk\, we discuss the ongoing classi fication of discriminant ideal twins. DTSTART;TZID=America/Los_Angeles:20260310T110000 DTEND;TZID=America/Los_Angeles:20260310T120000 LAST-MODIFIED:20260305T195130Z SUMMARY:: Towards a classification of discriminant ideal twins over number fields TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-10/towards-classification-di scriminant-ideal-twins-over-number-fields END:VEVENT BEGIN:VEVENT UID:d22beedc-adaa-4492-bbb0-f97b62b96a3a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260304T222218Z DESCRIPTION:Speaker: David Lee\, Northwestern\n\nIn a joint work with Ishan Levy\, we computed the mod $(p\,v_1)$ homotopy groups THH of the $(-1)$-c onnective covers of the $K(1)$-local sphere and its Galois extensions\, i. e. the fixed point of the connective Adams summand $\ell$ by various Adams operations. This can be used to compute TCs of these rings which are coun terexamples to the telescope conjecture at height $2$. In this talk\, I wi ll talk about an ongoing project with Ishan Levy where we compute the $v_1 $ Bocksteins of these THHs. The proof involves the Dehn twist argument of Burklund-Hahn-Levy-Schlank and the analysis of the trivialities of various Adams operation on $\ell/(p\,v_1^k)$ for varying $k$. DTSTART;TZID=America/Los_Angeles:20260310T153000 DTEND;TZID=America/Los_Angeles:20260310T163000 LAST-MODIFIED:20260304T222249Z LOCATION:PDL C-401 SUMMARY:: THH of the image of j TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-10/thh-image-j END:VEVENT BEGIN:VEVENT UID:3c86d172-3511-41ea-92df-50a250899e55 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251215T064652Z DESCRIPTION:Speaker: Michael Zeng\, University of Washington\n\nAbstract:Th e generalized coinvariant algebra \$R_{n\,k}\$ of Haglund–Rhoades–Shimozon o is a well-studied object in representation theory. Pawlowski–Rhoades con structed the variety of spanning line configurations \$X_{n\,k}\$\, whose cohomology ring is isomorphic to \$R_{n\,k}\$. In this talk\, we show that the \$K_0\$-ring of \$X_{n\,k}\$ is also canonically isomorphic to \$R_{n \,k}\$. We explore the question of when the \$K_0\$-ring of a variety is a bstractly isomorphic to its Chow ring\, providing a counterexample even wh en the variety is assumed to be smooth and paved by affines. We then discu ss word-Schubert\, word-Grothendieck polynomials\, and rectangular pipe dr eams\, generalizing many aspects of Schubert calculus of the flag variety to \$X_{n\,k}\$. Based on arXiv:2512.22769. Special note: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–3:50. The main ta lk starts at 4:00.Join Zoom Meeting: https://washington.zoom.us/j/91547335 974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260311T153000 DTEND;TZID=America/Los_Angeles:20260311T170000 LAST-MODIFIED:20260311T005004Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: The K 0 ring of spanning line configurations and a generalized ve rsion of Schubert calculus TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-11/k-0-ring-spanning-line-co nfigurations-and-generalized-version-schubert-calculus END:VEVENT BEGIN:VEVENT UID:fe0a34c7-6478-4115-a2f3-557e36ed288b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260309T203259Z DESCRIPTION:Speaker: Tyson Klingner\, UW\n\nThis talk will cover the founda tions of surface singularities. I will introduce the basics and characteri se ADE singularities. DTSTART;TZID=America/Los_Angeles:20260312T150000 DTEND;TZID=America/Los_Angeles:20260312T160000 LAST-MODIFIED:20260309T203310Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Surface Singularities TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-12/student-ag-seminar-surfac e-singularities END:VEVENT BEGIN:VEVENT UID:c12b9138-3258-4e33-8f56-d19eb9bc7f06 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260312T015823Z DESCRIPTION:Speaker: Jay Reiter\, UW\n\nThe Lichtenbaum--Quillen conjecture concerns the convergence of a motivic spectral sequence that begins with the étale cohomology of a variety and abuts to its algebraic \$\mathrm{K}\ $-theory. In the 1980's\, Thomason showed that (under appropriate circumst ances) after either rationalization or \$\mathrm{K}(1)\$-localization\, al gebraic \$\mathrm{K}\$-theory is a sheaf for the étale topology\, so in th ese cases the motivic spectral sequence is nothing more than an étale desc ent spectral sequence. For a while\, it was known that the obstruction to \$\mathrm{K}\$ being an étale sheaf is its failure to satisfy Galois desce nt. Using a general theory of descendability and 'deformations of descenda ble objects\,' Clausen--Mathew--Naumann--Noel extend Thomason's result to show that \$\mathrm{K}\$ satisfies Galois descent after localization at th e mapping telescope \$\mathrm{T}(n)\$ of a type-\$n\$ spectrum for any \$n \$. In this talk\, we'll give an overview of their techniques\, and (time permitting) outline how Yuan uses this result to give a formal proof of ch romatic redshift for Morava \$\mathrm{E}\$-theory DTSTART;TZID=America/Los_Angeles:20260313T133000 DTEND;TZID=America/Los_Angeles:20260313T143000 LAST-MODIFIED:20260312T175116Z LOCATION:CMU 230 SUMMARY:: DubTop Seminar Galois descent in algebraic K theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-13/dubtop-seminar-galois-des cent-algebraic-k-theory END:VEVENT BEGIN:VEVENT UID:2305913a-71c7-48d6-a0f3-b8ed40153958 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260129T232542Z DTSTART;TZID=America/Los_Angeles:20260313T153000 DTEND;TZID=America/Los_Angeles:20260313T163000 LAST-MODIFIED:20260129T232554Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Alex Wang Title TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-13/1-2-3-seminar-alex-wang-t itle-tba END:VEVENT BEGIN:VEVENT UID:8e4cf1b7-047f-4a9f-803f-51f1d8efd00c DTSTAMP:20260617T145208Z CATEGORIES:Special Events CLASS:PUBLIC CREATED:20260213T004034Z DESCRIPTION:Speaker: Math AI Lab\n\n    Lean ProjectsGeometric Measure Theo ryCommutative AlgebraAlgebraic GeometryCategory TheoryFormalization: zero- knowledge proofsProvable Computation in LeanAI ProjectsLean error correcti on with LLMsMathematician's copilot: Semantic Theorem SearchMathematician' s copilot: Math2VecCayleyPy: search on massive combinatorial graphsReinfor cement Learning for PolynomialsAI for Quantum Code CompilationDeep learnin g for number theory DTSTART;TZID=America/Los_Angeles:20260316T160000 DTEND;TZID=America/Los_Angeles:20260316T180000 LAST-MODIFIED:20260213T004044Z LOCATION:ODE 136 & 141 SUMMARY:: Math AI Lab poster session TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-16/math-ai-lab-poster-sessio n END:VEVENT BEGIN:VEVENT UID:fed76a6f-ceec-4308-b048-ed9b8982f196 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260329T004403Z DESCRIPTION:Speaker: Luca Battistella (University of Bologna)\n\nTitle pret alk: compactifications of $M_{1\,n}$ with Gorenstein curves.Abstract preta lk: I will describe the geometry of isolated Gorenstein curve singularitie s of genus one\, and how they can be used to build a multitude of alternat ive compactifications of $M_{1\,n}$. Title: Chow rings of moduli spaces of curves of genus one with few markings.Abstract: Modular compactifications of $M_{1\,n}$ parametrising only Gorenstein curves have been constructed and classified by Smyth and Bozlee-Kuo-Neff (there are a lot of them). The combinatorially simplest one $U_{1\,n}$ parametrises curves without ratio nal tails\; for $n \leq 6$\, Lekili and Polishchuk identified it with a we ighted projective stack or a Grassmannian. In joint work with Andrea Di Lo renzo\, we consider the Artin stack $G_{1\,n}$ of log- canonically polaris ed Gorenstein curves of genus one. It admits a stratification by tail type \, whose strata are products of $U_{1\,m}\, m \leq n$ with moduli spaces o f stable rational curves. For $n \leq 6$\, we find an explicit description of its integral Chow ring by patching. The Chow ring of any modular compa ctification (including $\overline{M}_{1\,n}$) can be obtained from $A^*(G_ {1\,n})$ by excision. Moreover\, these spaces satisfy the Chow-Künneth gen eration property (implying rational Chow=cohomology and polynomial point c unt).  DTSTART;TZID=America/Los_Angeles:20260331T134500 DTEND;TZID=America/Los_Angeles:20260331T153000 LAST-MODIFIED:20260329T004403Z LOCATION:PDL C-38 SUMMARY:: Chow rings of moduli spaces of curves of genus one with few marki ngs TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-03-31/chow-rings-moduli-spaces- curves-genus-one-few-markings END:VEVENT BEGIN:VEVENT UID:ab3d7dcd-f99b-4bbc-ba19-082531861741 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251215T064808Z DESCRIPTION:Speaker: Félix Gélinas\, York University\n\nAbstract:Hypergraph ic polytopes arise as Minkowski sums of simplices indexed by the hyperedge s of a hypergraph. Orienting the 1-skeleton of such a polytope by a certai n generic linear functional gives rise to the hypergraphic poset \$P_{\mat hbb{H}}\$. Hypergraphic posets include the weak order ​for the permutahedr on and the Tamari lattice for the associahedron. This motivates the proble m of determining when \$P_{\mathbb{H}}\$ is a lattice. In this paper\, we give a complete lattice characterization for cyclic interval hypergraphs\, extending the result of Bergeron and Pilaud for interval hypergraphs\, an d the result of Adenbaum et al. for the complete cyclic interval hypergrap h. This talk is based on joint work with Yirong Yang. Note: This talk begi ns with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/915473 35974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260401T153000 DTEND;TZID=America/Los_Angeles:20260401T170000 LAST-MODIFIED:20260321T031105Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: Lattice characterization of cyclic interval hypergraphic posets TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-01/lattice-characterization- cyclic-interval-hypergraphic-posets END:VEVENT BEGIN:VEVENT UID:2aedd902-e674-423f-87b8-44bb7a45c99b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260321T130243Z DESCRIPTION:Speaker: Martin Kassabov (Cornell)\n\nABSTRACT: Synchronization occurs in many natural and technological systems\, from cardiac pacemaker cells to coupled lasers. In the synchronized state\, the individual cells or lasers coordinate the timing of their oscillations\, but they do not m ove through space. A complementary form of self-organization occurs among swarming insects\, flocking birds\, or schooling fish\; now the individual s move through space\, but without conspicuously altering their internal s tates. Such systems are modelled by  oscillators whose phase dynamics and spatial dynamics are coupled.   Karamoto developed a relatively simple mod el for such systems – numerical simulations show that this model often lea ds to a synchronisation\, however several other types of behaviours are al so possible. I will describe recent results proving that under some condit ions the synchronisation is the only possible outcome.  This is a joint wo rk with Steve Strogatz and Alex Townsend.  DTSTART;TZID=America/Los_Angeles:20260401T153000 DTEND;TZID=America/Los_Angeles:20260401T163000 LAST-MODIFIED:20260331T140927Z LOCATION:DEN 111 SUMMARY:: The nbsp Kuramoto nbsp model and Synchronization nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-01/nbsp-kuramoto-nbsp-model- and-synchronization-nbsp END:VEVENT BEGIN:VEVENT UID:7f038eea-d8d9-4488-a9d0-82253aa96395 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260402T192247Z DESCRIPTION:Speaker: Michele Pernice\, UW\n\nIn this talk\, we will revisit the classical relation between Gm-gerbes and Azumaya algebras\, using Toë n and Lurie machinery. Moreover\, we will try to briefly talk about how\, in the non-normal case\, the derived Azumaya algebras also carry the datum of a twisted t-structure. DTSTART;TZID=America/Los_Angeles:20260402T150000 DTEND;TZID=America/Los_Angeles:20260402T160000 LAST-MODIFIED:20260402T192300Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Derived Azumaya algebras and Gm gerbes TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-02/student-ag-seminar-derive d-azumaya-algebras-and-gm-gerbes END:VEVENT BEGIN:VEVENT UID:88bf01db-20e6-4697-a5d4-2f54308cf623 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260402T195124Z DESCRIPTION:Speaker: Alex Wang\, University of Washington\n\nInspired by th e 1999 romantic comedy 10 Things I Hate About You\, I step on my soapbox t o discuss the complaints I have\, advice I'd give\, and lessons I've learn ed while navigating graduate school in Seattle.  As my perspective is just one of many\, I welcome and encourage others to share their experiences\, but ask that attendance is limited to graduate students only.  DTSTART;TZID=America/Los_Angeles:20260403T143000 DTEND;TZID=America/Los_Angeles:20260403T153000 LAST-MODIFIED:20260402T195135Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar 10 Things I Hate About Grad School TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-03/1-2-3-seminar-10-things-i -hate-about-grad-school END:VEVENT BEGIN:VEVENT UID:b8a8cfd7-1e8c-4513-bdeb-569cff46b225 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250721T212903Z DESCRIPTION:Speaker: Michael Naehrig\, Microsoft\n\nIn mathematics\, a proo f not only demonstrates that a statement is true\; it also allows others t o confirm its correctness by verifying the argument. This talk highlights two places where the same “prove and verify” principle is applied to build trustworthy security-critical systems by producing evidence that others c an independently verify. First\, we look at end-to-end verifiable election s\, where cryptographic techniques ensure ballots are well-formed and tall ying is correct while preserving voter privacy. Second\, we discuss formal verification of cryptographic software in Lean\, linking implementations to precise specifications and even validating the specifications themselve s. DTSTART;TZID=America/Los_Angeles:20260403T153000 DTEND;TZID=America/Los_Angeles:20260403T163000 LAST-MODIFIED:20260413T213447Z LOCATION:ECE-125 SUMMARY:: Y Math To prove and verify TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-03/y-math-prove-and-verify END:VEVENT BEGIN:VEVENT UID:c4a48a06-775f-4f9f-8417-bc99ee5a24dc DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260331T002721Z DESCRIPTION:Speaker: Justin Bloom\n\nTitle: Character theory for reductive groupsAbstract: What are reductive groups? Why are they important? What's so great about their representation theory? And WHAT are tilting modules? All these questions\, and more\, will be answered in our first StARTS meet ing of Spring 2026. Good vibes only! DTSTART;TZID=America/Los_Angeles:20260406T113000 DTEND;TZID=America/Los_Angeles:20260406T123000 LAST-MODIFIED:20260331T002721Z LOCATION:PDL C-401 SUMMARY:: StARTS Character theory for reductive groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-06/starts-character-theory-r eductive-groups END:VEVENT BEGIN:VEVENT UID:c0634180-6a6f-489b-804d-beb340fbfa8a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260331T181147Z DESCRIPTION:Speaker: Xiaoqin Guo\, University of Cincinnati\n\nAbstract: We consider the convergence rate of a random non-divergence form difference equation on \$Z^d\$ to its 'effective' differential equation on \$R^d\$. W e will discuss the optimal convergence rate when the coefficient field has a finite range of dependence. Moreover\, when the coefficient field is i. i.d.\, by exploiting the reflection symmetry of the distribution\, we prov e strictly faster convergence\, improving the generic finite-range rate. J oint work with Hung V. Tran (Wisconsin) and Timo Sprekeler (Texas A&M) DTSTART;TZID=America/Los_Angeles:20260406T143000 DTEND;TZID=America/Los_Angeles:20260406T153000 LAST-MODIFIED:20260331T181147Z LOCATION:RAI 121 SUMMARY:: Homogenization of non divergence form operators in i i d random e nvironments TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-06/homogenization-non-diverg ence-form-operators-i-i-d-random-environments END:VEVENT BEGIN:VEVENT UID:6805fde9-7560-4813-a603-1eca87003860 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001000Z DESCRIPTION:AGENDA Call to OrderChair's RemarksConsent AgendaAnnouncementsT rauma Stewardship (Camacho)Accessibility (Ostroff)New AI workgroup (Liebli ch)Committee ReportsGraduate Program Committee (Pevtsova)DiscussionsUse of AI on homework (Drouot)Strategic PlanReport from the GSRNew BusinessExecu tive SessionAdjournmentMINUTESChair's RemarksThe Chair provided updates on graduate admissions\, noting an incoming class of approximately seven stu dents against a target of ten. The personnel committee is actively working on merit review. Faculty were encouraged to engage with the department's strategic planning process\; a feedback session will be scheduled. The Cha ir noted that UW provides access to privacy-compliant AI tools via purple. uw.edu.AnnouncementsA survey on a trauma stewardship workshop will be dist ributed to faculty.An accessibility resource document will be shared with the department.An AI working group is underway\; a report is expected by J une.Committee ReportsGraduate Program Committee: The annual graduation cel ebration will be held June 3\, 5:30–7:30 PM\, with approximately 30–34 gra duating students. The GPC will pilot an individual development plan (IDP) process for graduate students to support short- and long-term goal setting .Discussion: AI and Undergraduate InstructionFaculty engaged in an extende d discussion on the impact of AI tools on homework and assessment. Key the mes included the observed negative correlation between homework and exam p erformance\, strategies for reweighting assessments\, the value of in-clas s and proctored work\, and how to communicate to students the enduring val ue of mathematical reasoning. The broader question of mathematics' role\, as a discipline and in service courses\, in an AI-enabled environment was raised.New BusinessThe dean search is ongoing.Two faculty meetings remain in the academic year. Committee assignments for the coming year will be de termined before the end of the quarter. DTSTART;TZID=America/Los_Angeles:20260407T110000 DTEND;TZID=America/Los_Angeles:20260407T120000 LAST-MODIFIED:20260602T035038Z LOCATION:HUB 214 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-07/faculty-meeting END:VEVENT BEGIN:VEVENT UID:f0af66fe-ae98-4e14-be51-ced5deb14c18 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260405T035436Z DESCRIPTION:Speaker: Rekha Thomas (UW)\n\nTitle: Classical Invariant Theory in Computer Vision \n\nAbstract: Given two sets of n points in space\, ty pically one expects their images in two different (projective) cameras to be distinct. However\, it can be that the images are the same up to a proj ective transformation\, which is an instance of ill-posedness in computer vision. In this talk we will see that generically\, this can happen only f or point sets with at most seven elements\, and that it is possible to det ermine the Zariski-closure of the locus of camera centers under which imag es coincide. The techniques rely on moduli spaces of n ordered points in t he projective plane\, classical invariant theory\, and extensive computati ons in Macaulay2. \n\nJoint work with Giorgio Ottaviani at the University of Florence.  DTSTART;TZID=America/Los_Angeles:20260407T134500 DTEND;TZID=America/Los_Angeles:20260407T153000 LAST-MODIFIED:20260405T035436Z LOCATION:PDL C-38 SUMMARY:: Classical nbsp Invariant Theory in Computer Vision nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-07/classical-nbsp-invariant- theory-computer-vision-nbsp END:VEVENT BEGIN:VEVENT UID:64b8118a-bc03-41a3-8fdb-39bd65a44f3b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260407T020650Z DESCRIPTION:Speaker: John Palmieri\, UW\n\nI plan to summarize what is know n when p=2\, discuss what modifications are necessary at odd primes\, and explain what we know and don't know about whether those modifications work . DTSTART;TZID=America/Los_Angeles:20260407T153000 DTEND;TZID=America/Los_Angeles:20260407T163000 LAST-MODIFIED:20260407T020757Z LOCATION:PDL C-401 SUMMARY:: Toward Quillen stratification for the odd primary Steenrod algebr a TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-07/toward-quillen-stratifica tion-odd-primary-steenrod-algebra END:VEVENT BEGIN:VEVENT UID:8696fde1-0c7c-4767-ad5e-22040cf60530 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251204T221253Z DESCRIPTION:Speaker: Luca Spolaor (UC San Diego)\n\nI will survey the state of the art on the regularity theory for multiplicity 2 integral stationar y currents. The talk will be based on joint work with C. De Lellis and J. Hirsch\, and will touch upon recent work of Becker Kahn\, Minter and Wickr amasekera. DTSTART;TZID=America/Los_Angeles:20260408T153000 DTEND;TZID=America/Los_Angeles:20260408T163000 LAST-MODIFIED:20260401T204021Z LOCATION:DEN 111 SUMMARY:: On the regularity of multiplicity 2 integral stationary currents TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-08/regularity-multiplicity-2 -integral-stationary-currents END:VEVENT BEGIN:VEVENT UID:a4844ef0-b117-4f4c-93ee-f55f17ed8831 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251017T043127Z DESCRIPTION:Speaker: Cosmin Pohoata\, Emory University\n\nAbstract:In a hig hly influential paper from 1978\, Lovász used topological methods to deter mine the chromatic number of the Kneser graph of the set of \$k\$-element subsets of a set with \$n\$ elements. In this talk\, we will discuss the K neser graph of the set of triangulations of a convex \$n\$-gon and a recen t proof that the chromatic number of this graph is \$n-2\$. The geometry o f the associahedron will play a particularly important role in the argumen t. Joint work with Anton Molnar\, Michael Zheng and Daniel Zhu.Note: This talk is online-only. It begins with a pre-seminar (aimed at graduate stude nts) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https:/ /washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260408T153000 DTEND;TZID=America/Los_Angeles:20260408T170000 LAST-MODIFIED:20260404T055447Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: A Lov sz Kneser theorem for triangulations TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-08/lov-sz-kneser-theorem-tri angulations END:VEVENT BEGIN:VEVENT UID:e6ec8d2c-d00a-4852-a5b3-6e6d359b710b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260326T022855Z DESCRIPTION:Speaker: Bianca Viray\, University of Washington\n\nAn accepted truism in arithmetic geometry is that curves of genus at least 2 have mor e complicated arithmetic than curves of genus 0 or 1. One way this is made precise is by Faltings's Theorem: any curve of genus at least 2 has only finitely many points over any number field. Another possibility for making this precise is to show that there are many number fields that cannot app ear as the residue field of points on a fixed curve of genus at least 2. I n this talk\, we report on results in this direction\, joint with Isabel V ogt. DTSTART;TZID=America/Los_Angeles:20260409T110000 DTEND;TZID=America/Los_Angeles:20260409T115000 LAST-MODIFIED:20260326T022855Z LOCATION:PDL C-401 SUMMARY:: Unlikely ramification in residue fields of points on curves TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-09/unlikely-ramification-res idue-fields-points-curves END:VEVENT BEGIN:VEVENT UID:3f60c554-bae7-47f5-ab2e-e4a4fcd48b50 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260407T023026Z DESCRIPTION:Speaker: Tyson Klingner\, UW\n\nLast talk we introduced the Min imal Model Program for smooth projective surfaces. This talk will be an ex tension where we introduce the Canonical Model of such a surface and compa re the minimal and canonical models. DTSTART;TZID=America/Los_Angeles:20260409T150000 DTEND;TZID=America/Los_Angeles:20260409T160000 LAST-MODIFIED:20260407T023035Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Canonical Model of Surfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-09/student-ag-seminar-canoni cal-model-surfaces END:VEVENT BEGIN:VEVENT UID:97211c50-6371-44cd-819b-df81d837363d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260409T021522Z DESCRIPTION:Speaker: Albert Jinghui Yang (Penn)\n\nThe celebrated Milnor co njecture establishes a deep connection between Milnor \$K\$-theory and Gal ois cohomology of a field \$k\$\, which in this case can be identified wit h étale cohomology. Its proof by Voevodsky\, via the introduction of motiv ic cohomology\, marked a foundational development in motivic homotopy theo ry.  As a consequence\, it also provides a key step toward the Lichtenbaum --Quillen conjecture. In this talk\, I will begin by introducing étale coh omology and then present Voevodsky’s norm residue theorem. I will briefly explain its relationship to the Lichtenbaum--Quillen conjecture. As an app lication\, I will discuss the computation of the motivic cohomology of a p oint over real closed fields and present a small recent result of my own i n this direction. DTSTART;TZID=America/Los_Angeles:20260410T133000 DTEND;TZID=America/Los_Angeles:20260410T143000 LAST-MODIFIED:20260409T021522Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar The Norm Residue Theorem and Applications TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-10/dubtop-seminar-norm-resid ue-theorem-and-applications END:VEVENT BEGIN:VEVENT UID:d060d01e-011b-4ebd-a7f2-8b7f81b62738 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260404T235722Z DESCRIPTION:Speaker: Charlie Magland\, University of Washington\n\nYou don' t love Hopf algebras enough! In this talk we will learn how Hopf algebras give a monoidal structure to their representations through simple examples in group theory\, super vector spaces\, and\, if there's time\, Yetter–Dr infeld modules. We will observe how switching our braiding can completely change our category of representations. Fear not! Every example we tackle can be understood using only linear algebra. DTSTART;TZID=America/Los_Angeles:20260410T143000 DTEND;TZID=America/Los_Angeles:20260410T153000 LAST-MODIFIED:20260409T164725Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Representations of Braided Hopf Algebras TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-10/1-2-3-seminar-representat ions-braided-hopf-algebras END:VEVENT BEGIN:VEVENT UID:afc1b22a-d383-4ae8-9e0d-829d9467d093 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20260122T181443Z DESCRIPTION:Speaker: Julia Pevtsova\, University of Washington\n\nTensor tr iangular geometry associates a rich geometric structure\, the spectrum\, t o a “nice” category where one can add\, subtract and multiply objects.  Ex amples include modules over a commutative ring and representations of a fi nite group. I’ll give an introduction to tensor triangular geometry via th e classical notion of support and present some examples of calculations wh ere pictures and diagrams of different degrees of beauty will appear. DTSTART;TZID=America/Los_Angeles:20260410T153000 DTEND;TZID=America/Los_Angeles:20260410T163000 LAST-MODIFIED:20260402T195219Z LOCATION:ECE 125 SUMMARY:: Tensor triangular geometry turning categories into spaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-10/tensor-triangular-geometr y-turning-categories-spaces END:VEVENT BEGIN:VEVENT UID:b374a327-02c5-47bd-ae0d-f3d3fdc1cf51 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260407T004027Z DESCRIPTION:Speaker: Wolfgang Allred\n\nTitle:  Koszul Duality for Rep Theo ristsAbstract: Have you heard the words 'Koszul duality' and looked them u p online\, only to be met with a bewildering variety of examples and phras es like 'Lie operad' or 'cobar construction'? If so\, you're not alone and help is available. I will go over some of the basic notions to do with Ko szul duality in representation theory\, and\, if there is time\, talk abou t some of the larger picture ideas in the more general homological phenome na of Koszul duality. DTSTART;TZID=America/Los_Angeles:20260413T113000 DTEND;TZID=America/Los_Angeles:20260413T123000 LAST-MODIFIED:20260413T012147Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-13/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:27c0c468-eac8-499f-93ec-5698c7476173 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260406T174918Z DESCRIPTION:Speaker: Adil Salim\n\nAI-generated data\, such as images and v ideos\, are typically produced using diffusion models. Generating such dat a is fundamentally a sampling problem\, usually addressed by discretizing a stochastic differential equation. I will present convergence results for samplers used in diffusion models\, providing theoretical justification f or why the generated images and videos look realistic. In particular\, I w ill present the first polynomial-complexity guarantee that applies without assuming any form of convexity of the target distribution and\, time perm itting\, an improved complexity guarantee whose explicit dependence on the dimension is removed.Joint work with Sitan Chen\, Sinho Chewi\, Khashayar Gatmiry\, Jerry Li\, Yuanzhi Li\, and Anru R. Zhang.  DTSTART;TZID=America/Los_Angeles:20260413T143000 DTEND;TZID=America/Los_Angeles:20260413T153000 LAST-MODIFIED:20260411T150609Z LOCATION:RAI 121 SUMMARY:: Theory for Sampling with Diffusion Models Under Minimal Data Assu mptions TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-13/theory-sampling-diffusion -models-under-minimal-data-assumptions END:VEVENT BEGIN:VEVENT UID:65e54df3-71e4-431b-ba2c-6da67ce0d149 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260412T052648Z DESCRIPTION:Speaker: Ian Selvaggi (SISSA)\n\nTitle pretalk: A gentle introd uction to Bridgeland stability conditions Abstract pretalk: Inspired by wo rk on String Theory\, Bridgeland developed a far-reaching formalism for st ability conditions on derived categories. The resulting theory has been ex tremely successful\, with applications ranging from enumerative invariants to representation theory. I will convey the main ideas and constructions by tracing similarities with the case of slope stability for curves\, high lighting the desired properties for the existence of good moduli spaces fo r the corresponding stacks of semistable objects.  Title: The deformation property of locally constant stability conditions Abstract: One of the tru ly remarkable features of Bridgeland stability conditions\, the deformatio n property\, tells us that the set of such has a natural structure of a co mplex manifold. Thus\, it is very interesting to see how the hypotheses wh ich grant the existence of good moduli spaces for the stacks of semistable objects interact with the manifold structure. In this talk I will explain the more recent approach to the construction of relative moduli spaces in the noncommutative setting\, due to Halpern-Leistner—Robotis\, and outlin e how an analogue of the deformation property can be carried in this conte xt. Notably\, the conditions allowing for the existence of good moduli spa ces turn out depend only on the connected components of the resulting mani fold.  DTSTART;TZID=America/Los_Angeles:20260414T134500 DTEND;TZID=America/Los_Angeles:20260414T153000 LAST-MODIFIED:20260412T052648Z LOCATION:PDL C-38 SUMMARY:: The deformation property of locally constant stability conditions TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-14/deformation-property-loca lly-constant-stability-conditions END:VEVENT BEGIN:VEVENT UID:d7fe89cc-2ee5-4ebf-98d7-aa11ed006258 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20251017T043031Z DESCRIPTION:Speaker: Ilani Axelrod-Freed\, Massachusetts Institute of Techn ology\n\nAbstract:For each permutation \$w\$\, we consider the set \$\math rm{PD}(w)\$ of reduced pipe dreams for \$w\$\, partially ordered so that c over relations correspond to (generalized) chute moves. Settling a conject ure of Rubey from 2012\, we prove that \$\mathrm{PD}(w)\$ is a lattice. To establish this result\, we provide a global description of the partial or der on \$\mathrm{PD}(w)\$ by showing that \$\mathrm{PD}(w)\$ is isomorphic to a poset consisting of objects called Lehmer tableaux. In addition\, we prove that \$\mathrm{PD}(w)\$ is a semidistributive polygonal lattice who se polygons are all diamonds or pentagons.  Note: This talk begins with a pre-seminar (aimed at graduate students) at 3:30–4:00. The main talk start s at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeti ng ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260415T153000 DTEND;TZID=America/Los_Angeles:20260415T170000 LAST-MODIFIED:20260325T075528Z LOCATION:PDL C-401 and via Zoom Link: https://washington.zoom.us/j/91547335 974 SUMMARY:: The Chute Moves Lattice TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-15/chute-moves-lattice END:VEVENT BEGIN:VEVENT UID:71b14b9e-27f6-43f2-b625-5ff646f4c525 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260410T003913Z DESCRIPTION:Speaker: Zhiqian (Simon) Du\, UC Davis\n\nWe give a new proof t hat translation-invariant free Fermion frustration-free models have zero H all conductance. The central argument is that in frustration-free models\, edge modes can’t merge into the ground state band. We also give an exampl e of gapped frustration-free model that is gapless on the half-plane. DTSTART;TZID=America/Los_Angeles:20260415T153000 DTEND;TZID=America/Los_Angeles:20260415T163000 LAST-MODIFIED:20260410T003957Z LOCATION:DEN 111 SUMMARY:: Absence of Hall conductance in frustration free fermionic system TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-15/absence-hall-conductance- frustration-free-fermionic-system END:VEVENT BEGIN:VEVENT UID:68764b95-dd61-46ee-8ea1-8b3842b168b2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260413T223659Z DESCRIPTION:Speaker: Michael Zeng\, UW\n\nOriented cohomology theories prov ide a general framework for refined topological invariants of schemes\, wh ich admits intersection-theory-type calculus. The Chow ring\, the \$K_0\$- ring\, and algebraic cobordism of Levine--Morel are all instances of such theories. In this talk\, we give a presentation of the oriented cohomology ring of the blowup of a smooth scheme along a smooth center. We compute e xplicit examples of such presentations for the cases of del Pezzo surfaces and the blowup of \$\mathbb{P}^5\$ along the Veronese surface\, the latte r of which can be identified with the moduli space of complete conics. We demonstrate that one can recover solutions to enumerative problems such as Steiner's \$3264\$ conics in an arbitrary oriented cohomology theory. Fin ally\, we give a presentation to the algebraic cobordism ring of \$\overli ne M_{0\,n}\$\, which generalizes Keel's presentation of the Chow ring. DTSTART;TZID=America/Los_Angeles:20260416T150000 DTEND;TZID=America/Los_Angeles:20260416T160000 LAST-MODIFIED:20260413T223740Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Oriented Cohomology Rings of Blowups TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-16/student-ag-seminar-orient ed-cohomology-rings-blowups END:VEVENT BEGIN:VEVENT UID:b2924892-39a9-4abe-ba69-645a70643793 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260407T004138Z DESCRIPTION:Speaker: Alex Waugh\n\nTitle: Ghosts hiding in the FrobeniusAbs tract: In characteristic p\, we often have the freshman's dream: (x+y)^p = x^p + y^p. In commutative algebra\, this is an absolute equality. That is \, the equality sign means equality on the nose. In this talk\, I will dis cuss a derived/homotopical perspective on this dream\, where equality is r eplaced with 'homotopic'. By keeping track of all of the resulting homotop ical data\, I will show how to produce maps which were hidden within the d erived Frobenius and produce operations which will act on Hopf algebra coh omology. Time permitting\, I will connect this construction with the vanis hing of certain Tate cohomology and operad theory.  DTSTART;TZID=America/Los_Angeles:20260420T113000 DTEND;TZID=America/Los_Angeles:20260420T123000 LAST-MODIFIED:20260417T222624Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-20/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:6fabe895-32fa-44a7-97c9-d8648c2f50bb DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260406T175010Z DESCRIPTION:Speaker: Christian Gorski\, UW\n\nPermutons are objects from pr obabilistic combinatorics that can be thought of as 'continuum limits of p ermutations.' Just as permutations are equipped with a natural notion of c omposition\, so too are permutons. I'll discuss some properties of this co mposition operation\, some limitations\, and what it can tell us about com positions of random permutations. We will find that taking a functional-an alytic perspective allows us to prove some surprising results in a rather 'soft' way. DTSTART;TZID=America/Los_Angeles:20260420T143000 DTEND;TZID=America/Los_Angeles:20260420T153000 LAST-MODIFIED:20260413T183456Z LOCATION:RAI 121 SUMMARY:: Composition of Permutons TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-20/composition-permutons END:VEVENT BEGIN:VEVENT UID:0a3eb1e5-ca02-4331-b36f-3b0786f64876 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260325T185322Z DESCRIPTION:Speaker: Sebastian Muñoz (U. Paris Saclay)\n\nI will report on a recent work with M. Cekić and T. Lefeuvre. We prove a complete asymptoti c expansion of the correlation function in inverse powers of the time vari able\, for flows which arise as Abelian extensions\, that is\, extensions to Z^d-covers\, of certain partially hyperbolic flows. This includes the f rame flow of an Abelian cover of a negatively curved closed Riemannian man ifold (M\, g)\, if the frame flow on (M\, g) is ergodic. As a special case \, our theorem also applies to Abelian-extensions of Anosov flow. The proo f uses Fourier series in Z^d (Floquet theory)\, (microlocal) anisotropic S obolev spaces tailored to the dynamics\, as well as the semiclassical Bore l-Weil calculus on principal bundles. DTSTART;TZID=America/Los_Angeles:20260422T160000 DTEND;TZID=America/Los_Angeles:20260422T170000 LAST-MODIFIED:20260417T214420Z LOCATION:PDL C-038 SUMMARY:: Decay of correlations on Abelian covers of isometric extensions o f Anosov flows joint with IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-22/decay-correlations-abelia n-covers-isometric-extensions-anosov-flows-joint-ip END:VEVENT BEGIN:VEVENT UID:f144afc7-3f9b-4c0e-b08c-1f2fe466043e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260331T071014Z DESCRIPTION:Speaker: Yirong Yang\, University of Washington\n\nAbstract:Thi s talk focuses on shellable simplicial spheres\, which are triangulations of topological spheres with a special combinatorial decomposition property . I will describe recent progress on two fundamental questions: how many s hellable spheres exist\, and how much information is encoded in their face t-ridge graphs. For the first question\, I will briefly go over Nevo\, San tos\, and Wilson’s construction of many odd-dimensional simplicial spheres and sketch why they are shellable\, thereby obtaining an asymptotic resul t. For the second question\, I will outline how to recover the full combin atorial structure of a shellable sphere from its facet-ridge graph. I will conclude with nice examples of shellable spheres arising as independence complexes of Gorenstein planar ternary graphs.Note: Please note the specia l location\, Smith 205. There will be no pre-seminar. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meetin g ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260422T160000 DTEND;TZID=America/Los_Angeles:20260422T170000 LAST-MODIFIED:20260417T185128Z LOCATION:SMI 205 and via Zoom Link: https://washington.zoom.us/j/9154733597 4 SUMMARY:: Shellable Simplicial Spheres Enumeration and Reconstruction TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-22/shellable-simplicial-sphe res-enumeration-and-reconstruction END:VEVENT BEGIN:VEVENT UID:88d538c4-c2eb-4eff-8392-0291b987587f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260420T210928Z DESCRIPTION:Speaker: Daniel Halpern-Leistner\, Cornell\n\nTwo different app roaches to moduli theory in algebraic geometry have developed in parallel since the 1960's: The intrinsic approach attempts to describe a moduli pro blem as an algebraic stack\, and to generalize the notions of algebraic ge ometry in order to study the geometry of this stack directly. The other ap proach is to approximate your moduli problem as the classification of orbi ts for the action of a reductive group on a projective variety (e.g.\, a Q uot scheme)\, then turn the crank of geometric invariant theory (GIT) to i dentify a semistability condition and construct a moduli space\, and final ly to re-express the resulting semistability condition more intrinsically. Over the last decade\, work of myself and others has unified these two ap proaches in a package of theorems that allow one to study semistability co nditions\, moduli spaces\, and canonical stratifications all in the intrin sic context. This has shed new light on several moduli problems of interes t in algebraic geometry\, such as the moduli of Fano varieties in higher d imensions or the moduli of decorated principal bundles on curves. I will s urvey techniques that have been developed to apply the general machinery i n several contexts\, as well as contexts where new techniques are needed. DTSTART;TZID=America/Los_Angeles:20260423T150000 DTEND;TZID=America/Los_Angeles:20260423T160000 LAST-MODIFIED:20260420T210928Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar An overview of intrinsic moduli theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-23/student-ag-seminar-overvi ew-intrinsic-moduli-theory END:VEVENT BEGIN:VEVENT UID:d6ad84db-b2d7-4bb9-a153-9d8a1c460970 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260423T155104Z DESCRIPTION:Speaker: Ting Gong (UW)\n\nIn this talk\, I will introduce form al groups and explain some of the reasons they are important in algebraic geometry\, topology\, number theory\, and representation theory. I will di scuss their role in the origins of chromatic homotopy theory\, and also sa y something about Artin--Mazur formal groups from algebraic geometry. If t ime permits\, I will briefly mention topological modular forms. DTSTART;TZID=America/Los_Angeles:20260424T133000 DTEND;TZID=America/Los_Angeles:20260424T143000 LAST-MODIFIED:20260423T155104Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar A formal talk TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-24/dubtop-seminar-formal-tal k END:VEVENT BEGIN:VEVENT UID:f8a1a391-6abe-4231-927d-46df8f771d04 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260404T235851Z DESCRIPTION:Speaker: Justin Bloom\, University of Washington\n\nWhat is com plexity\, in mathematics? What is rigidity\, in mathematics? I have a stro ng suspicion that these two notions may be related\, but when I present my metamathematical theorem relating them\, you should find this relationshi p to be dubious. By raising your doubts\, we will approach a more refined definition for both of these mathematical notions\, and for the contexts i n which they are tied to one another\, by means of critical dialogue.  DTSTART;TZID=America/Los_Angeles:20260424T143000 DTEND;TZID=America/Los_Angeles:20260424T153000 LAST-MODIFIED:20260416T194706Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Dialogue on complexity and rigidity TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-24/1-2-3-seminar-dialogue-co mplexity-and-rigidity END:VEVENT BEGIN:VEVENT UID:5d725df5-ad0e-49b3-8799-e95034aae3d7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000027Z DTSTART;TZID=America/Los_Angeles:20260424T143000 DTEND;TZID=America/Los_Angeles:20260424T153000 LAST-MODIFIED:20260416T175918Z LOCATION:PDL C-401 SUMMARY:: CANCELED: 1 2 3 Seminar Manyi Guo Title TBA nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-24/1-2-3-seminar-manyi-guo-t itle-tba-nbsp END:VEVENT BEGIN:VEVENT UID:9b965d7a-5d0f-4a90-8bfd-fd89b3c32a46 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T204800Z DESCRIPTION:Speaker: Andrew Aguilar\n\nTitle: How Exactly Does One Derive a Category?Abstract: Many important functors over abelian categories are\, unfortunately\, not exact. To resolve this\, we introduce a “universal” fu nctor obtained from the original which “completes” the complexes. But the correct place to study these new derived functors is the derived category. That is\, the category where quasi-isomorphisms are actually isomorphisms . In this talk we wish to extend this construction to more general exact c ategories\, where the notion of a quasi-isomorphism\, in the usual sense\, is impossible! DTSTART;TZID=America/Los_Angeles:20260427T113000 DTEND;TZID=America/Los_Angeles:20260427T123000 LAST-MODIFIED:20260424T204903Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-27/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:9833958a-fc6d-41cc-b7ab-b18a85f5a0cd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260406T175052Z DESCRIPTION:Speaker: Joseph Slote\, UW CS\n\nAbstract: Polynomial discretiz ation inequalities\, a central topic in approximation theory\, control the norm of a polynomial p on some domain Ω by the norm of p on a finite subs et of Ω. The high-dimensional\, low-degree regime for p is important in ma ny applications in probability\, geometry\, and computer science\, but has received comparatively little attention. In this talk we introduce a new probabilistic interpolation technique for proving polynomial discretizatio n inequalities in product spaces\, yielding dimension-free bounds.Based on joint work with Lars Becker\, Ohad Klein\, Alexander Volberg\, and Haonan Zhang. DTSTART;TZID=America/Los_Angeles:20260427T143000 DTEND;TZID=America/Los_Angeles:20260427T153000 LAST-MODIFIED:20260421T211441Z LOCATION:RAI 121 SUMMARY:: A probabilistic approach to discretization inequalities TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-27/probabilistic-approach-di scretization-inequalities END:VEVENT BEGIN:VEVENT UID:2648cb9c-3d66-4dca-9a51-da0b364708c9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260321T130942Z DESCRIPTION:Speaker: Guillaume Bal (Chicago)\n\nA surprising edge transport \, displaying strong robustness to perturbations as an obstruction to Ande rson localization\, is guaranteed along interfaces separating two-dimensio nal insulators in different topological phases. We review the classificati on of several bulk and interface models of topological insulators and anal yze their relation via a so-called bulk-edge correspondence. For suitable models\, we present a spectral and scattering theory allowing for a quanti tative description of the asymmetric edge transport along the waveguide in the presence of perturbations. Time permitting\, we will also present rec ent results on the corresponding inverse scattering theory. DTSTART;TZID=America/Los_Angeles:20260429T153000 DTEND;TZID=America/Los_Angeles:20260429T163000 LAST-MODIFIED:20260427T231904Z LOCATION:DEN 111 SUMMARY:: Classification and scattering theory for topological insulators TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-29/classification-and-scatte ring-theory-topological-insulators END:VEVENT BEGIN:VEVENT UID:2104a945-8d8a-4ac5-863e-f4b80ef29565 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260416T212709Z DESCRIPTION:Speaker: Joshua Hinman\, University of Washington\n\nAbstract:A four-dimensional polytope has four types of faces: vertices\, edges\, pol ygons\, and facets. Combinatorialists are on the hunt for fat polytopes: t hose with many edges and polygons but few facets and vertices. In my thesi s defense\, I'll share my construction of shellable spheres---objects slig htly more general than polytopes---with unbounded fatness. These spheres a re a new piece of evidence that arbitrarily fat polytopes may exist!Note: Please note the special location\, Smith 205. This talk begins with a pre- seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting I D: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260429T153000 DTEND;TZID=America/Los_Angeles:20260429T170000 LAST-MODIFIED:20260518T073010Z LOCATION:SMI 205 and via Zoom Link: https://washington.zoom.us/j/9154733597 4 SUMMARY:: Fat Polytopes and Spheres TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-29/fat-polytopes-and-spheres END:VEVENT BEGIN:VEVENT UID:1bf83ed7-8dee-46eb-96d9-2c5fefc0ad09 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260309T155243Z DESCRIPTION:Speaker: Ru-yu Lai (U. of Minnesota)\n\nIn this talk\, we will begin by introducing mathematical background andrecent developments relate d to inverse problems for the transportequation. We will explore the linea rization technique and utilize itto recover collision kernels in both the Boltzmann collision operatorand the BGK operator from measurements collect ed at the boundary ofthe domain. DTSTART;TZID=America/Los_Angeles:20260429T163000 DTEND;TZID=America/Los_Angeles:20260429T173000 LAST-MODIFIED:20260429T204344Z LOCATION:PDL C-038 SUMMARY:: Inverse problems for the Boltzmann equation and the BGK equation joint with IP seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-29/inverse-problems-boltzman n-equation-and-bgk-equation-joint-ip-seminar END:VEVENT BEGIN:VEVENT UID:baa3ed25-6623-4540-a613-d2fa6b2a88c8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260429T202350Z DESCRIPTION:Speaker: Vivasvat Vatatmaja\, UIUC\n\nWhen studying geometry\, one is naturally led to embrace cohomology in its various incarnations. Th e functoriality properties of cohomology in these different settings can b e uniformly encoded into the framework of abstract six functor formalisms. The advantage of abstraction is that it leads to more streamlined proofs of the various properties of cohomology in different settings (especially useful in this modern industry of constructing 'designer' cohomology theor ies). I will explain how the yoga of 6 functor formalism works and how to construct them in practice. DTSTART;TZID=America/Los_Angeles:20260430T150000 DTEND;TZID=America/Los_Angeles:20260430T160000 LAST-MODIFIED:20260429T202350Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Six Functor Formalisms TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-30/student-ag-seminar-six-fu nctor-formalisms END:VEVENT BEGIN:VEVENT UID:d1494948-f35a-42fa-ad3f-fe3f51d8275b DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions\, Special Events CLASS:PUBLIC CREATED:20260427T061449Z DESCRIPTION:Speaker: GSRs and Julia\n\nStarting next year\, all grad studen ts will be required to formulate an individual development plan to decide on their goals\, make a plan for the coming year and to discuss with their advisor what the coming challenges might be. The plan to fill out has bee n developed by the GSRs! The IDP requirement was approved by the grad prog ram committee\, but we still have a chance to edit things before finalizin g. A link to the current draft of the document is attached.Come join us on Thursday the 30th\, 4:30-5:30pm at PDL C-038 for an informal Q&A about th e IDP. We will have food at the event: from Domino's\, but only non-pizza items.  This will be a great opportunity to learn about the IDP\, ask any questions and offer your suggestions. Both students and faculty members ar e welcome. The IDP will become required starting this September\, so now i s the perfect time to think about it!  DTSTART;TZID=America/Los_Angeles:20260430T163000 DTEND;TZID=America/Los_Angeles:20260430T173000 LAST-MODIFIED:20260427T061459Z LOCATION:PDL C-038 SUMMARY:: IDP Informal Q amp A TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-04-30/idp-informal-q-amp END:VEVENT BEGIN:VEVENT UID:edc735a8-04f8-4947-8fcb-08870ec8864d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260427T194847Z DESCRIPTION:Speaker: Jackson Morris (UW)\n\nThe \$K(n)\$-local sphere is a fundamental object of interest in chromatic homotopy theory. One may acces s this object by Galois descent from its separable closure\, the Lubin--Ta te spectrum of height \$n\$ attached to the Honda formal group law. Howeve r\, as the Galois group \$\mathbb{G}_n\$ is a large \$p\$-adic Lie group\, this is not very practical. An easier task is to approximate the \$K(n)\$ -local sphere by descent along finite subgroups of \$\mathbb{G}_n\$. The r esulting homotopy fixed points are known as higher real \$K\$-theories\, a nd they are among the most important and well-studied spectra we have at o ur disposal.In this series of talks I will discuss the role that higher re al \$K\$-theories play in chromatic homotopy theory. In talk 1\, I will in troduce the main characters and landscape and mention tools for computatio n. In talk 2\, I will introduce redshift in algebraic \$K\$-theory and blu eshift in Tate fixed points for higher real \$K\$-theories. DTSTART;TZID=America/Los_Angeles:20260501T133000 DTEND;TZID=America/Los_Angeles:20260501T143000 LAST-MODIFIED:20260427T194847Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar Higher real K theories redshift and blueshift TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-01/dubtop-seminar-higher-rea l-k-theories-redshift-and-blueshift-0 END:VEVENT BEGIN:VEVENT UID:ceecd173-6644-484f-af8c-78786622bd8d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260427T194535Z DESCRIPTION:Speaker: Jackson Morris (UW)\n\nThe \$K(n)\$-local sphere is a fundamental object of interest in chromatic homotopy theory. One may acces s this object by Galois descent from its separable closure\, the Lubin--Ta te spectrum of height n attached to the Honda formal group law. However\, as the Galois group \$\mathbb{G}_n\$ is a large \$p\$-adic Lie group\, thi s is not very practical. An easier task is to approximate the \$K(n)\$-loc al sphere by descent along finite subgroups of \$\mathbb{G}_n\$. The resul ting homotopy fixed points are known as higher real \$K\$-theories\, and t hey are among the most important and well-studied spectra we have at our d isposal.In this series of talks I will discuss the role that higher real \ $K\$-theories play in chromatic homotopy theory. In talk 1\, I will introd uce the main characters and landscape and mention tools for computation. I n talk 2\, I will introduce redshift in algebraic \$K\$-theory and blueshi ft in Tate fixed points for higher real \$K\$-theories. DTSTART;TZID=America/Los_Angeles:20260501T133000 DTEND;TZID=America/Los_Angeles:20260501T143000 LAST-MODIFIED:20260427T194800Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar Higher real K theories redshift and blueshift TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-01/dubtop-seminar-higher-rea l-k-theories-redshift-and-blueshift END:VEVENT BEGIN:VEVENT UID:d42fb831-f79f-41ba-846a-b103f0dd9577 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000149Z DESCRIPTION:Speaker: Bryan Lu\, University of Washington\n\nYou are cordial ly invited to PDL C-401 to celebrate the beautiful connection between the standard n-simplex and the complex projective space. A series of three gue sts will toast these interconnected partners and illustrate the deep chemi stry that unites many pairs of members between the family of polytopes and the family of projective toric varieties. Please feel free to come even i f one is not so familiar with algebraic geometry -- any speakers from the algebraic geometry community will be sure to introduce themselves thorough ly. Refreshments will be served in PDL C-120 following the speeches. DTSTART;TZID=America/Los_Angeles:20260501T143000 DTEND;TZID=America/Los_Angeles:20260501T153000 LAST-MODIFIED:20260430T214118Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Standard n Simplex and Complex Projective Space TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-01/1-2-3-seminar-standard-n- simplex-and-complex-projective-space END:VEVENT BEGIN:VEVENT UID:5595daf2-1649-43d4-abfe-4b54b9a90e90 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20250723T174010Z DTSTART;TZID=America/Los_Angeles:20260501T153000 DTEND;TZID=America/Los_Angeles:20260501T163000 LAST-MODIFIED:20260225T225347Z LOCATION:ECE 125 SUMMARY:: CANCELED: AI4Crypto Machine Learning attacks on Post Quantum Cryp tography TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-01/ai4crypto-machine-learnin g-attacks-post-quantum-cryptography END:VEVENT BEGIN:VEVENT UID:22072744-b02b-4598-a027-177e2a6700d4 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T205019Z DESCRIPTION:Speaker: Bryan Lu\n\nTitle: TBAAbstract: TBA DTSTART;TZID=America/Los_Angeles:20260504T113000 DTEND;TZID=America/Los_Angeles:20260504T123000 LAST-MODIFIED:20260424T205019Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-04/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:0abbfeab-3da6-46bc-93a2-2d6a25b44e35 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260406T174354Z DESCRIPTION:Speaker: Ryokichi Tanaka\, Kyoto University\n\nThe general nois e sensitivity problem asks:  Given a stochastic process X defined in terms of i.i.d. variables\,does resampling a small fraction of these variables produce analmost independent copy of X ? or a highly correlated copy?In th is talk\, we discuss the following questions:Can a random walk on a group be noise sensitive?Which groups admit a noise sensitive random walk?  DTSTART;TZID=America/Los_Angeles:20260504T143000 DTEND;TZID=America/Los_Angeles:20260504T153000 LAST-MODIFIED:20260406T174442Z LOCATION:RAI 121 SUMMARY:: Noise sensitivity and stability of random walks on groups TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-04/noise-sensitivity-and-sta bility-random-walks-groups END:VEVENT BEGIN:VEVENT UID:68c44d63-235a-4438-aaee-42f99fec3edc DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001016Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaC ommittee ReportsUndergraduate Program - ThomasReport from the GSRNew Busin essExecutive SessionAdjournmentMINUTESChair's RemarksThe Chair reported 41 students interested in the summer PRIME program and 8 students joining th e incoming graduate class. The personnel committee completed merit reviews . Faculty were asked to provide feedback on the dean search. The Chair not ed broader strategic questions about the department's structure\, programs \, and website presence\, with time to reflect through the end of fall qua rter.AnnouncementsThe UW Math Olympiad will be held the first Sunday of Ju ne\, 9:00 AM–1:30 PM\; volunteers are needed.Career series events continue this week\, including a job panel Thursday at 4:00 PM.The UW-PIMS Colloqu ium this Friday is joint with CS\; all are welcome.Consent AgendaApproval of past meeting minutes will appear on the next consent agenda.Committee R eportsUndergraduate Program Committee: The autumn time schedule is live. M ath 126 (now with updated curriculum) has been approved for distribution t o community colleges and other departments\, effective fall. The UPC prese nted proposals for renaming and restructuring the honors calculus sequence s (13x → 131/2/3) and advanced sequences (33x → 331/2/3)\, expanding them from 5 to 6 credits\, and adding formal prerequisites for Math 342. A prop osal to modify BS core requirements is also under discussion. These change s would take effect in 2027–28.Graduate Student Representative: Elections for GSR and GSSC positions are underway\, with results expected by end of May.New BusinessThe College is piloting a new administrative staffing mode l that would centralize staff functions across departments. The department is monitoring developments and advocating for staffing arrangements that preserve operational flexibility and excellence. The timeline remains unde r negotiation\, with a possible implementation deferral to 2027. DTSTART;TZID=America/Los_Angeles:20260505T110000 DTEND;TZID=America/Los_Angeles:20260505T120000 LAST-MODIFIED:20260602T035401Z LOCATION:HUB 214 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-05/faculty-meeting END:VEVENT BEGIN:VEVENT UID:2a9f1b75-b926-418a-9429-5e69a31f38df DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260429T172930Z DESCRIPTION:Speaker: Haoming Ning\n\n'On Higher Du Bois and Higher Rational Pairs'Advisor: Sándor Kovács DTSTART;TZID=America/Los_Angeles:20260505T143000 DTEND;TZID=America/Los_Angeles:20260505T153000 LAST-MODIFIED:20260429T173141Z LOCATION:PDL C-38 SUMMARY:: Final exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-05/final-exam END:VEVENT BEGIN:VEVENT UID:76788aaa-c550-4088-b35f-d39db49cb3d7 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260502T231854Z DESCRIPTION:Speaker: Shangjie Zhang\, UCSD\n\nIn their solution to the Kerv aire invariant problem\, Hill--Hopkins--Ravenel established a key quantiti ve relation between the Euler classes and the orientation classes in the c oefficients of the $C_{2^n}$ equivariant $H\underline{F_2}$\, which they c all the 'gold relation'. This talk concerns a natural follow-up question a bout whether such relation exists in equivariant stable stems. Though the orientation classes does not exist in this context\, I will discuss the co rresponding relations between the Euler classes in the $C_{p^n}$-equivaria nt stable stems. In the sense of Bruner--Greenlees and Hopkins--Lin--Shi-- Xu's interpretation\, this is equivalent to the computation of $C_{p^n}$-e quivariant Mahowald invariant for the family of Euler classes. DTSTART;TZID=America/Los_Angeles:20260505T153000 DTEND;TZID=America/Los_Angeles:20260505T163000 LAST-MODIFIED:20260502T231854Z LOCATION:PDL C-401 SUMMARY:: The gold relation in C p n equivariant stable stems and Mahowald invariants TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-05/gold-relation-c-p-n-equiv ariant-stable-stems-and-mahowald-invariants END:VEVENT BEGIN:VEVENT UID:eba6d858-b9f0-45ad-8452-f2999d31b2b0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260506T005426Z DESCRIPTION:Speaker: 1st Year Graduate Students\, Graduate Program Committe e Members\, and Instructors of First Year Courses are invited.\n\nThe 'Fir st Year Chat' is an opportunity for the 1st year graduate students\, membe rs of the graduate program committee\, and faculty teaching the core cours es to chat about the experience.    We will all have an opportunity to sha re insights on this stage of the program\, ask questions\, brainstorm poss ible solutions for any challenges that have come up\, and to consider ways to improve the experience for future students.   DTSTART;TZID=America/Los_Angeles:20260505T160000 DTEND;TZID=America/Los_Angeles:20260505T170000 LAST-MODIFIED:20260506T005426Z LOCATION:Padelford C-38 SUMMARY:: First Year Chat TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-05/first-year-chat END:VEVENT BEGIN:VEVENT UID:87d41ca1-ddf3-40f2-961e-3cc60560a06b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260416T213039Z DESCRIPTION:Speaker: Cameron Wright\, University of Washington\n\nAbstract: This talk describes some aspects of the author's thesis work\, giving an a ccount of some interactions between the theory of oriented matroids\, topo logy\, and algebraic geometry. We first recall the basic notions and key r esults of oriented matroid theory used in the main theorems\, and consider some relevant topological and geometric models. The first main result pre sented here provides a toric arrangement model of single-element liftings of regular matroids\, yielding enumerative consequences for quotients of z onotopal subdivisions by lattice translation. After briefly describing the construction of these arrangements\, we turn to some algebraic-geometric implications of counts\, culminating with a formula for the class of certa in compactified moduli spaces in the Grothendieck ring of varieties.Note: Please note the special location\, Smith 205. This talk begins with a pre- seminar (aimed at graduate students) at 3:30–4:00. The main talk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335974Meeting I D: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260506T153000 DTEND;TZID=America/Los_Angeles:20260506T170000 LAST-MODIFIED:20260518T072852Z LOCATION:SMI 205 and via Zoom Link: https://washington.zoom.us/j/9154733597 4 SUMMARY:: Matroids Arrangements and Moduli TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-06/matroids-arrangements-and -moduli END:VEVENT BEGIN:VEVENT UID:5a3a6960-327a-4fbb-8fd6-b1b4c4b1e1a9 DTSTAMP:20260617T145208Z CATEGORIES:Academic Calendar\, Seminars CLASS:PUBLIC CREATED:20260421T191659Z DESCRIPTION:Speaker: Tina Torkaman\, University of Chicago\n\nLet \$X\$ be a compact hyperbolic surface and \$C\$ a geodesic current which is a geode sic-flow invariant measure. Denote the measure-theoretic entropy of \$C\$ by \$h_X​(C)\$. In this talk\, assuming \$C\$ is ergodic\, we give an uppe r bound on \$h_X​(C)\$ in terms of its self-intersection number \$i(C\,C)\ $ and the systole of \$X\$. In particular\, we show that a small self-inte rsection number forces small entropy. DTSTART;TZID=America/Los_Angeles:20260506T153000 DTEND;TZID=America/Los_Angeles:20260506T163000 LAST-MODIFIED:20260421T191755Z LOCATION:Denny 111 SUMMARY:: Entropy nbsp and self intersection number of geodesic currents on compact hyperbolic surfaces TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-06/entropy-nbsp-and-self-int ersection-number-geodesic-currents-compact-hyperbolic END:VEVENT BEGIN:VEVENT UID:1887e27c-2337-4d9e-8615-32437577043c DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260429T172703Z DESCRIPTION:Speaker: Cameron Wright\n\n'Matroid-Theoretic Approaches to Com pactified Jacobians and Vector Bundles'Advisor: Farbod Shokrieh DTSTART;TZID=America/Los_Angeles:20260506T160000 DTEND;TZID=America/Los_Angeles:20260506T170000 LAST-MODIFIED:20260505T032751Z LOCATION:SMI 205 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-06/final-exam END:VEVENT BEGIN:VEVENT UID:62d83599-5e2d-4620-9f24-2f2e12a1c6c8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260504T193637Z DESCRIPTION:Speaker: Andrew Obus\, Baruch College\, CUNY\n\nLet X  P^1 be a Z/n-branched cover over a complete discretely valued field K\, where n d oes not divide the residue characteristic of K.  We explicitly construct t he minimal regular normal crossings model of X over the valuation ring of K.  By “explicitly”\, we mean that we construct a normal model of P^1 whos e normalization in K(X) is the desired regular model.  The normal model of P^1 is fully encoded as a basket of finitely many discrete valuations on the rational function field K(P^1)\, each of which is given using Mac Lane ’s 1936 notation involving finitely many polynomials and rational numbers (no familiarity with Mac Lane’s notation will be assumed)!.  This is joint work with Padmavathi Srinivasan. DTSTART;TZID=America/Los_Angeles:20260507T110000 DTEND;TZID=America/Los_Angeles:20260507T115000 LAST-MODIFIED:20260506T044353Z LOCATION:PDL C-401 SUMMARY:: Regular models of superelliptic curves via Mac Lane valuations TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-07/regular-models-superellip tic-curves-mac-lane-valuations END:VEVENT BEGIN:VEVENT UID:d18ec124-a382-40d6-a580-d49e96a7614f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260504T173518Z DESCRIPTION:Speaker: Lorenzo Bottiglione\, UW\n\nIn this talk we will discu ss some results about the global geometry of a rational function over a no n-Archimedean field\, viewed as an analytic endomorphism of the Berkovich projective line. We will see how these findings help answer (at least part ially) some questions in the field of non-Archimedean dynamics. DTSTART;TZID=America/Los_Angeles:20260507T150000 DTEND;TZID=America/Los_Angeles:20260507T160000 LAST-MODIFIED:20260504T173534Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar A global understanding of a non Archimedean ra tional function TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-07/student-ag-seminar-global -understanding-non-archimedean-rational-function END:VEVENT BEGIN:VEVENT UID:4e419650-233c-482b-8886-96448d597848 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260429T165358Z DESCRIPTION:Speaker: Jacob Ogden\n\n'Partial differential equations and vol ume-minimization problems for Lagrangian submanifolds'Advisor: Yu Yuan DTSTART;TZID=America/Los_Angeles:20260507T153000 DTEND;TZID=America/Los_Angeles:20260507T163000 LAST-MODIFIED:20260429T170604Z LOCATION:JHN 175 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-07/final-exam END:VEVENT BEGIN:VEVENT UID:67f3ff97-21bf-4d5f-a358-39ec22f4b7d7 DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions\, Student Activities CLASS:PUBLIC CREATED:20260425T000736Z DESCRIPTION:Speaker: Tracy Chin\, Linhang Huang\, Jack Kendrick\, Nathan Ch eung\, Hyojeong Son\, and Alexander Wang\n\nThe focus of this panel is on how and when to start applying for academic and/or industry jobs as a mat h grad student.    Members of the panel will help introduce you to differe nt aspects of the job search process.    There will be info on applying to research postdocs and teaching positions at the college level. This inclu des finding letters of recommendation\, writing research/teaching statemen ts\, and the logistics of the applications.    We also hope to cover appli cations for internships and permanent positions in industry.   Many of the deadlines come up early in the Fall so you might want to start thinking a bout it now if you are getting close to finishing.    Panelists will inclu de Tracy Chin\, Linhang Huang\, Jack Kendrick\, Nathan Cheung\,  Hyojeong Son\, and Alexander Wang.    Everyone is welcome to join\, ask questions a nd contribute to the discussion.   Others who have recently applied are es pecially encouraged to attend and share some thoughts on the process.   Zo om option: https://washington.zoom.us/j/99536285511 DTSTART;TZID=America/Los_Angeles:20260507T160000 DTEND;TZID=America/Los_Angeles:20260508T000000 LAST-MODIFIED:20260506T005127Z LOCATION:PDL C-038 SUMMARY:: Career Transitions nbsp Panel on Applying for Jobs TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-07/career-transitions-nbsp-p anel-applying-jobs END:VEVENT BEGIN:VEVENT UID:ceecd173-6644-484f-af8c-78786622bd8d DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260427T194535Z DESCRIPTION:Speaker: Jackson Morris (UW)\n\nThe \$K(n)\$-local sphere is a fundamental object of interest in chromatic homotopy theory. One may acces s this object by Galois descent from its separable closure\, the Lubin--Ta te spectrum of height n attached to the Honda formal group law. However\, as the Galois group \$\mathbb{G}_n\$ is a large \$p\$-adic Lie group\, thi s is not very practical. An easier task is to approximate the \$K(n)\$-loc al sphere by descent along finite subgroups of \$\mathbb{G}_n\$. The resul ting homotopy fixed points are known as higher real \$K\$-theories\, and t hey are among the most important and well-studied spectra we have at our d isposal.In this series of talks I will discuss the role that higher real \ $K\$-theories play in chromatic homotopy theory. In talk 1\, I will introd uce the main characters and landscape and mention tools for computation. I n talk 2\, I will introduce redshift in algebraic \$K\$-theory and blueshi ft in Tate fixed points for higher real \$K\$-theories. DTSTART;TZID=America/Los_Angeles:20260501T133000 DTEND;TZID=America/Los_Angeles:20260501T143000 LAST-MODIFIED:20260427T194800Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar Higher real K theories redshift and blueshift TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-01/dubtop-seminar-higher-rea l-k-theories-redshift-and-blueshift END:VEVENT BEGIN:VEVENT UID:5524681b-5669-41c6-bffa-da4cbcc541a5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000324Z DESCRIPTION:Speaker: Varun Shah\, University of Washington\n\nWhy is 7¹³¹−7 divisible by 131? How can we easily tell whether \binom{146}{k} is odd? W hy is  the number of such k a power of 2? In this talk\, we explore how ma ny such questions can be answered using a single tool: bijective combinato rics. By realizing these familiar expressions as sizes of sets of combinat orial objects\, divisibility and parity emerge from hidden symmetries of t hese sets. Since this is a pictionary talk\, all proofs will be proofs in pictures. DTSTART;TZID=America/Los_Angeles:20260508T143000 DTEND;TZID=America/Los_Angeles:20260508T153000 LAST-MODIFIED:20260508T055717Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Primes Parity and Partitions TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-08/1-2-3-seminar-primes-pari ty-and-partitions END:VEVENT BEGIN:VEVENT UID:3876e254-d100-4f12-a316-7a9d278a2439 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20260402T195942Z DESCRIPTION:Speaker: Leonardo de Moura\, Senior Principal Applied Scientist in the Automated Reasoning Group at AW and creator of Lean FRO\n\nLean is a proof assistant and programming language designed to make formal verifi cation practical. In this talk\, I will describe how Lean works\, what it can do today\, and where it is going.The core idea is simple: every mathem atical claim and every program can be checked by a machine. This changes w hat collaboration looks like: between mathematicians\, between engineers\, and increasingly between humans and AI systems. When a proof is machine-c hecked\, you do not need to trust the author. You just check it.I will dis cuss recent work on proof automation and AI-assisted formalization\, inclu ding experiments where multi-agent AI systems work autonomously on Lean ta sks. I will also describe the Lean FRO\, a nonprofit building Lean as long -term open infrastructure for mathematics and verified software. DTSTART;TZID=America/Los_Angeles:20260508T153000 DTEND;TZID=America/Los_Angeles:20260508T163000 LAST-MODIFIED:20260416T201847Z LOCATION:ECE 105 SUMMARY:: Lean Machine Checked Mathematics and AI Collaboration TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-08/lean-machine-checked-math ematics-and-ai-collaboration END:VEVENT BEGIN:VEVENT UID:ef3af919-85a6-4313-ba88-4cf86ed327f8 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T205059Z DESCRIPTION:Speaker: Ting Gong\n\nTitle: Kato HomologyAbstract: Kato homolo gy is a homological invariant designed to measure the failure of local-to- global principles in arithmetic geometry. Starting from the Bloch-Ogus spe ctral sequence for étale homology\, Kato extracted complexes whose terms a re built from the Galois cohomology of the residue fields of points. The h omology of these complexes detects whether the expected Gersten-type exact ness\, or equivalently a suitable cohomological Hasse principle\, holds fo r an arithmetic scheme. In this talk\, I will introduce the Kato complex t hrough the niveau spectral sequence\, explain the intuition that Kato homo logy is the “error term” in a cohomological Hasse principle\, and discuss why its vanishing is powerful. DTSTART;TZID=America/Los_Angeles:20260511T113000 DTEND;TZID=America/Los_Angeles:20260511T123000 LAST-MODIFIED:20260507T192216Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-11/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:2f0e8cce-78f6-41aa-b860-4cee0aa4135c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260406T175149Z DESCRIPTION:Speaker: Greg Lawler\, University of Chicago\n\nAbstract: I wi ll review the Brownian loop measure as a limit of random walk loop measure s and discuss some decompositions into boundary bubbles.  We give a formul ation of the measure on the unit disk in terms of measure-driven Loewner e volutions and something we call “Brownian bubble tea”.  This latter work i s part of joint work with Frederik Viklund\, Yilin Wang\, and Catherine Wo lfram.  DTSTART;TZID=America/Los_Angeles:20260511T143000 DTEND;TZID=America/Los_Angeles:20260511T153000 LAST-MODIFIED:20260505T170708Z LOCATION:RAI 121 SUMMARY:: Exploring the Brownian loop measure nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-11/exploring-brownian-loop-m easure-nbsp END:VEVENT BEGIN:VEVENT UID:3d53266c-0232-43e3-8777-153e5fa3c53c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260511T020432Z DESCRIPTION:Speaker: Santosh Vempala\, Georgia Tech\n\nLarge language model s often guess when uncertain\, producing plausible yet incorrect statement s instead of admitting uncertainty. Such 'hallucinations' persist even in state-of-the-art systems. We analyze this phenomenon from a mathematical p erspective and find that the statistical pressures of the next-word predic tion training pipeline induce hallucinations and current evaluation proced ures reward guessing over acknowledging uncertainty. We also propose 'open rubric' evaluations with explicit error penalties\, providing a practical path to reliable LLMS by aligning their incentives. The talk will be fact -based\, and the speaker will readily admit ignorance. Joint work with Ada m T. Kalai\, Ofer Nachum and Eddie Zhang.   DTSTART;TZID=America/Los_Angeles:20260511T153000 DTEND;TZID=America/Los_Angeles:20260511T163000 LAST-MODIFIED:20260511T020432Z LOCATION:Gates Commons CSE1 691 SUMMARY:: Why Language Models Hallucinate TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-11/why-language-models-hallu cinate END:VEVENT BEGIN:VEVENT UID:c4597b6d-0057-41b6-af22-420235f76ae2 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260321T131223Z DESCRIPTION:Speaker: Francois Monard (UC Santa Cruz)\n\nAbstract: On a Riem annian manifold (M\,g)\, the tensor tomography problem consists of inferri ng what is reconstructible of asymmetric m-tensor field from the collectio n of its 'longitudinal' integrals along all geodesics through M\,i.e.\, it s geodesic X-ray transform. On manifolds with boundary\, this problem aris es in X-ray computerizedtomography\, travel-time tomography\, and tomograp hy in elastic media\, among other settings. On asymptoticallyhyperbolic su rfaces\, it is also related to linearized entanglement entropy functionals in the AdS/CFTcorrespondence\, out of which one may consider the reconstr uction of a bulk metric. In many of these geometricsituations\, the (non-t rivial) kernel of the X-ray transform over m-tensors is known precisely. F rom the perspectiveof the inverse problem\, it remains to address range ch aracterization issues\, and reconstruction\, including thedesign of 'good' representatives modulo kernel to be reconstructed from X-ray data.In this talk\, I will discuss an iterated transverse-tracefree decomposition of t ensor fields onasymptotically hyperbolic surfaces\, and will explain how t o envision its reconstruction from X-ray data\, basedon a few key steps wh ich are geometry-dependent. I will then explain how these key steps can be explicitlyachieved on the Poincare disk\, where in this case\, a full ran ge characterization of the X-raytransform over tensor fields will also be presented.Based on joint works with Nikolaos Eptaminitakis (Hannover U) an d Yuzhou Zou (Oakland U).  DTSTART;TZID=America/Los_Angeles:20260512T143000 DTEND;TZID=America/Los_Angeles:20260512T153000 LAST-MODIFIED:20260505T145317Z LOCATION:PDL C-401 SUMMARY:: Tensor tomography on Asymptotically Hyperbolic surfaces the recon struction problem TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-12/tensor-tomography-asympto tically-hyperbolic-surfaces-reconstruction-problem END:VEVENT BEGIN:VEVENT UID:97f6cb95-925c-4c5d-b296-6aa944863469 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260429T173317Z DESCRIPTION:Speaker: Justin Bloom\n\n'K-rigidity in modular representation theory'Advisor: Julia Pevtsova DTSTART;TZID=America/Los_Angeles:20260512T143000 DTEND;TZID=America/Los_Angeles:20260512T153000 LAST-MODIFIED:20260429T173358Z LOCATION:PDL C-38 SUMMARY:: Final exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-12/final-exam END:VEVENT BEGIN:VEVENT UID:d94227d5-b60c-44e2-8849-525b871b9818 DTSTAMP:20260617T145208Z CATEGORIES:Lectures\, Special Events CLASS:PUBLIC CREATED:20260121T003042Z DESCRIPTION:Speaker: Richard Kenyon\, Yale University\n\nLecture I: Webs\, multiwebs\, traces. The main theorem statement.An n-web is an n-valent bip artite ribbon graph. (Planar) webs arise in representation theory: they ar e combinatorial devices used to understand invariants in tensor products o f irreducible representations. Webs on surfaces can likewise be used to pa rameterize the character- or representation-variety of the surface.Intrigu ingly\, webs on surfaces also arise in the n-dimer model of statistical me chanics. In these lectures we discuss webs and their connection with the p robability and statistical mechanics of the dimer model\, giving a vast ge neralization of the classical Kasteleyn theorem which counts dimer covers (perfect matchings) of planar graphs.These lectures are based on joint wor k with Dan Douglas\, Nicholas Ovenhouse\, Haolin Shi\, Haihan Wu.(This is a joint talk with the Department of Applied Mathematics.)  DTSTART;TZID=America/Los_Angeles:20260512T160000 DTEND;TZID=America/Los_Angeles:20260512T170000 LAST-MODIFIED:20260421T204139Z LOCATION:KNE 220 SUMMARY:: Milliman Lecture Dimers and webs TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-12/milliman-lecture-dimers-a nd-webs END:VEVENT BEGIN:VEVENT UID:2c9f24a1-f77e-4361-9590-dd3d15e68a61 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260430T202549Z DESCRIPTION:Speaker: Tony Zeng\n\n'Problems in Discrete and Continuous Geom etry'Advisor: Stefan Steinerberger DTSTART;TZID=America/Los_Angeles:20260513T100000 DTEND;TZID=America/Los_Angeles:20260513T110000 LAST-MODIFIED:20260430T202637Z LOCATION:LOEW 206 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-13/final-exam END:VEVENT BEGIN:VEVENT UID:bc1c686d-857e-47bc-b632-3dd841399618 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260104T020336Z DESCRIPTION:Speaker: Peter McGrath (NCSU)\n\nThe Faber-Krahn inequality ass erts that the round balls uniquely minimize the first eigenvalue of the La placian among domains in $\R^n$ with fixed volume.  In 1970\, Serrin prove d more generally that balls are the only critical points for the functiona l assigning a domain in $\R^n$ to its first eigenvalue\, among volume-pres erving variations.  Much less is known about the analogous problem for dom ains in the round $n$-sphere\, and for $n=2$\, Souam conjectured (2005) th e only critical domains are rotationally symmetric disks and annuli.  I wi ll discuss the construction of counterexamples (joint work with C. Hines a nd J. Kolesar) to this conjecture.  DTSTART;TZID=America/Los_Angeles:20260513T150000 DTEND;TZID=America/Los_Angeles:20260513T160000 LAST-MODIFIED:20260506T160913Z LOCATION:DEN 111 SUMMARY:: Extremal Domains for the First Eigenvalue of the Laplacian TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-13/extremal-domains-first-ei genvalue-laplacian END:VEVENT BEGIN:VEVENT UID:f5595789-2fcc-43c0-b094-039d25ad2dbf DTSTAMP:20260617T145208Z CATEGORIES:Lectures\, Special Events CLASS:PUBLIC CREATED:20260121T003915Z DESCRIPTION:Speaker: Richard Kenyon\, Yale University\n\nLecture II: SL3 ca se: reduced webs\, scaling limits. Connection to the 4-color theorem.An n- web is an n-valent bipartite ribbon graph. (Planar) webs arise in represen tation theory: they are combinatorial devices used to understand invariant s in tensor products of irreducible representations. Webs on surfaces can likewise be used to parameterize the character- or representation-variety of the surface.Intriguingly\, webs on surfaces also arise in the n-dimer m odel of statistical mechanics. In these lectures we discuss webs and their connection with the probability and statistical mechanics of the dimer mo del\, giving a vast generalization of the classical Kasteleyn theorem whic h counts dimer covers (perfect matchings) of planar graphs.These lectures are based on joint work with Dan Douglas\, Nicholas Ovenhouse\, Haolin Shi \, Haihan Wu. DTSTART;TZID=America/Los_Angeles:20260513T160000 DTEND;TZID=America/Los_Angeles:20260513T170000 LAST-MODIFIED:20260304T225948Z LOCATION:MLR 301 SUMMARY:: Milliman Lecture Dimers and webs TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-13/milliman-lecture-dimers-a nd-webs END:VEVENT BEGIN:VEVENT UID:f3e6539f-3370-4c37-abcb-f86130dee49e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260512T230955Z DESCRIPTION:Speaker: Mallory Dolorfino\, UW\n\nIn this talk\, we will discu ss a recent result of Claudio Gómez-Gonzáles and Jesse Wolfson about solva ble points on intersections of hypersurfaces in projective space. In parti cular\, we will give an upper bound on the minimum ambient dimension requi red to guarantee the density of solvable points on such an intersection. I n doing so\, we will introduce their method of polar cones and obliteratio n\, and we will see how these results extend and relate to classical quest ions about solvability in a broader context.  DTSTART;TZID=America/Los_Angeles:20260514T150000 DTEND;TZID=America/Los_Angeles:20260514T160000 LAST-MODIFIED:20260512T231007Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Solvable points on intersections of quadrics c ubics and quartics TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-14/student-ag-seminar-solvab le-points-intersections-quadrics-cubics-and-quartics END:VEVENT BEGIN:VEVENT UID:28028a1b-3c68-4a6d-89d0-1941cb3b5155 DTSTAMP:20260617T145208Z CATEGORIES:Lectures\, Special Events CLASS:PUBLIC CREATED:20260121T004019Z DESCRIPTION:Speaker: Richard Kenyon\, Yale University\n\nLecture III: Posit ive connections and generalizations.An n-web is an n-valent bipartite ribb on graph. (Planar) webs arise in representation theory: they are combinato rial devices used to understand invariants in tensor products of irreducib le representations. Webs on surfaces can likewise be used to parameterize the character- or representation-variety of the surface.Intriguingly\, web s on surfaces also arise in the n-dimer model of statistical mechanics. In these lectures we discuss webs and their connection with the probability and statistical mechanics of the dimer model\, giving a vast generalizatio n of the classical Kasteleyn theorem which counts dimer covers (perfect ma tchings) of planar graphs.These lectures are based on joint work with Dan Douglas\, Nicholas Ovenhouse\, Haolin Shi\, Haihan Wu. DTSTART;TZID=America/Los_Angeles:20260514T160000 DTEND;TZID=America/Los_Angeles:20260514T170000 LAST-MODIFIED:20260304T230410Z LOCATION:MLR 301 SUMMARY:: Milliman Lecture Dimers and webs TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-14/milliman-lecture-dimers-a nd-webs END:VEVENT BEGIN:VEVENT UID:a7ac29b8-284f-48c3-8595-046527bf7d08 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260508T224048Z DESCRIPTION:Speaker: Jay Reiter (UW)\n\nThe Zariski--Nagata purity theorem states that the Galois group of a scheme is invariant under deletion of a closed subscheme of codimension at least \$2\$. A conjecture of Mathew sug gests that a similar phenomenon occurs for chromatically-localized \$\math bb{E}_\infty\$-rings\, namely that the map \$L_nR\to L_1R\$ is an equivale nce on Galois groups. If \$R\$ is Landweber exact\, this follows from the fact that \$L_1\$-localization behaves like restriction to the open substa ck \$\mathcal{M}_\mathrm{fg}^{\leq1}\hookrightarrow\mathcal{M}_\mathrm{fg} \$\, whose compliment\, defined by the ideal \$(p\,v_1)\$\, has codimensio n \$2\$. The case of the \$E_n\$-local sphere then follows from the fact t hat the map \$L_n\mathbb{S}\to E_n\$ is descendable.In this talk\, I'll in troduce Mathew's theory of Galois groups of \$2\$-rings and descendability \, and discuss some thoughts I've been having about how techniques from th e proof of the chromatic Nullstellensatz may apply to this conjecture. Thi s will probably include some high-level discussion of the spherical Witt v ector / tilt adjunction\, \$T(n)\$-local homotopy\, and the process of con structing maps to Lubin--Tate theories which detect nilpotence. DTSTART;TZID=America/Los_Angeles:20260515T133000 DTEND;TZID=America/Los_Angeles:20260515T143000 LAST-MODIFIED:20260510T010443Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar Toward chromatic Galois purity TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-15/dubtop-seminar-toward-chr omatic-galois-purity END:VEVENT BEGIN:VEVENT UID:e554f8a4-fa4f-4072-b737-232014b155ca DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000446Z DESCRIPTION:Speaker: Mallory Dolorfino\, University of Washington\n\nWhat i s a solvable point\, why do we care about them\, and when should (or shoul dn't) a variety have many of them? This talk will be a friendly introducti on to solvable points on varieties\, intended for a broad audience\, in wh ich we will answer each question above. In doing so\, we will introduce th e guiding principle of arithmetic geometry -- that interesting arithmetic occurs for a geometric reason -- and we will see an example of this in the case of studying solvable points on curves.  DTSTART;TZID=America/Los_Angeles:20260515T143000 DTEND;TZID=America/Los_Angeles:20260515T153000 LAST-MODIFIED:20260513T145519Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Solvable points on varieties TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-15/1-2-3-seminar-solvable-po ints-varieties END:VEVENT BEGIN:VEVENT UID:9e38238c-455a-4800-ad4d-fd90546141cd DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T211059Z DESCRIPTION:Speaker: Justin Bloom\n\nTitle: Lectures on Dieudonné theory (I )Abstract: Lectures on commutative unipotent group schemes and the Cartier --Gabriel theorem\, and a recent theorem of Gouthier. Part I of III: Revie wing Witt vectors\, and Cartier duality for finite commutative group schem es.    DTSTART;TZID=America/Los_Angeles:20260518T113000 DTEND;TZID=America/Los_Angeles:20260518T123000 LAST-MODIFIED:20260424T211059Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-18/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:a3ac5e79-6e48-4b6b-acb6-454641625890 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260406T175232Z DESCRIPTION:Speaker: Shankar Bhamidi\, University of North Carolina\n\nAbst ract:Coagulation models were first formulated in the early twentieth centu ry in colloidal chemistry. They entered modern discrete probability throug h the work of Aldous\, who revealed a striking connection between the mult iplicative coalescent and the Erdős–Rényi random graph in the critical reg ime. This connection gives a precise mathematical description of how macro scopic components\, or “gels\,” emerge from the coagulation of microscopic dust.The aim of this talk is to illustrate the two-way flow of ideas betw een coagulation models and random graph theory. On one hand\, random graph s provide canonical examples of coagulation dynamics in which clusters mer ge through random connections. On the other hand\, the coagulation perspec tive has become a powerful framework for proving results in modern probabi listic combinatorics. I will describe applications including:universality of the critical regime for broad classes of random graph models\;scaling l imits for random edge-weighted minimal spanning trees and related Erdős–Ré nyi graph processes\;functional central limit theorems for both microscopi c and macroscopic observables.If time permits\, I will also discuss recent connections between multiplicative coalescents with immigration and netwo rk archaeology for growing networks.     DTSTART;TZID=America/Los_Angeles:20260518T143000 DTEND;TZID=America/Los_Angeles:20260518T153000 LAST-MODIFIED:20260505T171021Z LOCATION:RAI 121 SUMMARY:: Coagulation Models and Random Networks TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-18/coagulation-models-and-ra ndom-networks END:VEVENT BEGIN:VEVENT UID:3cbcf960-37ec-4b28-af7e-98950e69dbe9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260511T020204Z DESCRIPTION:Speaker: Dustin Mixon\, OSU\n\nMachine learning algorithms are typically designed for Euclidean data\, but many natural datasets come wit h symmetries: a group G of isometries acts on a Euclidean space V\, and po ints in the same orbit represent the same object. That means the true data space is not V\, but the orbit space V/G. Invariant machine learning repr esents this quotient by a G-invariant feature map into Euclidean space. Fo r robustness\, especially against adversarial examples\, this feature map should be bilipschitz with respect to the quotient metric. Sadly\, vanilla polynomial invariants fail to be bilipschitz\, so we need to move beyond classical invariant theory. In this talk\, we present low-distortion embed dings in a variety of settings\, and we conclude with several open problem s.  DTSTART;TZID=America/Los_Angeles:20260518T153000 DTEND;TZID=America/Los_Angeles:20260518T163000 LAST-MODIFIED:20260511T020204Z LOCATION:Gates Commons CSE1 691 SUMMARY:: Bilipschitz embeddings for invariant machine learning nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-18/bilipschitz-embeddings-in variant-machine-learning-nbsp END:VEVENT BEGIN:VEVENT UID:1441ec24-a6a5-4f1c-8821-13b0d699cfa3 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20260512T144520Z DESCRIPTION:Speaker: Leo Zhang\n\nAdvisor: Gunther Uhlmann DTSTART;TZID=America/Los_Angeles:20260518T153000 DTEND;TZID=America/Los_Angeles:20260518T163000 LAST-MODIFIED:20260512T144554Z LOCATION:CMU 230 SUMMARY:: General exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-18/general-exam END:VEVENT BEGIN:VEVENT UID:d9c4e4ff-7dc1-44bc-a613-55957c4abcee DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260512T144108Z DESCRIPTION:Speaker: Kevin Tully\n\n'A Microlocal Analysis of the Levy Gene rator with Conjugate Points'Advisor: Gunther Uhlmann DTSTART;TZID=America/Los_Angeles:20260519T103000 DTEND;TZID=America/Los_Angeles:20260519T113000 LAST-MODIFIED:20260512T144147Z LOCATION:SAV 168 SUMMARY:: Final exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-19/final-exam END:VEVENT BEGIN:VEVENT UID:3c1a9f1a-2d52-487f-9bc1-f25c8eb19404 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260514T210005Z DESCRIPTION:Speaker: Leo Mayer\n\n'Formalization of Structural Properties o f Triangulated Categories'Advisor: Max Lieblich DTSTART;TZID=America/Los_Angeles:20260519T140000 DTEND;TZID=America/Los_Angeles:20260519T150000 LAST-MODIFIED:20260514T210046Z LOCATION:PDL C-38 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-19/final-exam-0 END:VEVENT BEGIN:VEVENT UID:88e26a98-43dd-492d-8aad-837515e34b63 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260516T213213Z DESCRIPTION:Speaker: Toni Annala\, University of Toronto\n\nIn algebraic to pology\, pushforwards in generalized cohomology theories arise from a sing le geometric construction: the Thom collapse map. This talk explains an al gebro-geometric analogue of that construction. Although special cases have long been available\, a general Thom collapse map in algebraic geometry h as only recently been developed by Longke Tang in the setting of non-A^1-i nvariant motivic homotopy theory introduced by Annala\, Hoyois\, and Iwasa . Tang’s construction gives a universal source of pushforwards for essenti ally all cohomology theories occurring in algebraic geometry.I will explai n Tang's construction\, the subtleties that are present in the non-A^1-inv ariant setting\, and how this perspective gives a conceptual explanation f or many standard properties of cohomology theories. If time permits\, I wi ll discuss an application to logarithmic geometry: the cohomology of nice enough log schemes can be reformulated in terms of cohomology of ordinary schemes. DTSTART;TZID=America/Los_Angeles:20260519T153000 DTEND;TZID=America/Los_Angeles:20260519T163000 LAST-MODIFIED:20260516T213228Z LOCATION:PDL C-401 SUMMARY:: Thom collapse map in algebraic geometry TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-19/thom-collapse-map-algebra ic-geometry END:VEVENT BEGIN:VEVENT UID:e18db062-531c-489d-9baa-508d9b347415 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260513T145455Z DESCRIPTION:Speaker: Alex Wang\n\n'Rational points on curves and surfaces a nd the Brauer--Manin obstruction'Advisor: Bianca Viray DTSTART;TZID=America/Los_Angeles:20260520T114500 DTEND;TZID=America/Los_Angeles:20260520T124500 LAST-MODIFIED:20260513T145539Z LOCATION:SMI 102 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-20/final-exam-0 END:VEVENT BEGIN:VEVENT UID:58c4d61f-8106-4354-b315-b6ea953bf021 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260429T210919Z DESCRIPTION:Speaker: Mahan MJ\, TIFR\n\nA nearly hundred-year old question by Fatou asks for a synthesis of the following two kinds of holomorphic dy namical systems under a common framework of holomorphic correspondences on the Riemann sphere: (a) Kleinian groups acting on the Riemann sphere (b) iteration of complex polynomials on the Riemann sphere. Sullivan's diction ary gave us a way of translating techniques from one of these fields to gi ve results in the other. In a relatively recent development\, building on Sullivan's dictionary\, a bridge has been built between these two classes in the spirit of Bers' simultaneous uniformization theorem. New holomorphi c dynamical systems on the Riemann sphere have thus been discovered that a rise as combinations or matings of Kleinian groups and polynomials. In som e cases\, these single valued matings give rise to multi-valued algebraic correspondences on the Riemann sphere\, partially fulfilling Fatou's dream . A particular consequence of these constructions is an analog of the comp actness theorem for Bers slices of punctured sphere groups. In 1982\, Thur ston posed a number of questions that guided the development of the theory of Kleinian groups for the next 3 decades. With the above analog of Bers compactness in place\, many of these questions reincarnate themselves in t his new context. We will survey some of these developments and questions. This is joint work with Yusheng Luo and Sabyasachi Mukherjee. DTSTART;TZID=America/Los_Angeles:20260520T153000 DTEND;TZID=America/Los_Angeles:20260520T163000 LAST-MODIFIED:20260429T210919Z LOCATION:Denny 111 SUMMARY:: The Fatou Sullivan dictionary and Thurston s questions TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-20/fatou-sullivan-dictionary -and-thurston-s-questions END:VEVENT BEGIN:VEVENT UID:21211d60-9dd4-444b-8a43-9ac0f277534a DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260512T145644Z DESCRIPTION:Speaker: Tracy Chin\n\n'Delta Matroids and the Geometry of Poly nomials'Advisor: Cynthia Vinzant DTSTART;TZID=America/Los_Angeles:20260520T160000 DTEND;TZID=America/Los_Angeles:20260520T170000 LAST-MODIFIED:20260512T150725Z LOCATION:SMI 205 SUMMARY:: Final exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-20/final-exam END:VEVENT BEGIN:VEVENT UID:70ba6819-117d-456f-83c9-b646150d525a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260416T213216Z DESCRIPTION:Speaker: Tracy Chin\, University of Washington\n\nAbstract:Lore ntzian polynomials have recently garnered great interest in combinatorics and have proved to be a useful tool in attacking problems ranging from mat roids to knot theory. In particular\, they provide a bridge between the lo g-concavity of a polynomial as a function and the discrete log-concavity o f its coefficients. In this talk\, we will examine various efforts to gene ralize the theory of Lorentzian polynomials to delta matroids\, which are a generalization of matroids naturally arising from areas as wide-ranging as matchings\, principal minors\, and ribbon graphs. We will first explore the motivation for this work\, including an application for sampling from the bases of a delta matroid. Then\, we will look at several ways one mig ht try to generalize Lorentzianity to the delta matroid setting and examin e where each falls short.Note: Please note the special location\, Smith 20 5. There will be no pre-seminar. The main talk starts at 4:10.Join Zoom Me eting: https://washington.zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260520T160000 DTEND;TZID=America/Los_Angeles:20260520T170000 LAST-MODIFIED:20260518T072741Z LOCATION:SMI 205 and via Zoom Link: https://washington.zoom.us/j/9154733597 4 SUMMARY:: Delta Matroids and Fractional Log Concavity TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-20/delta-matroids-and-fracti onal-log-concavity END:VEVENT BEGIN:VEVENT UID:8fdeb4d6-83b0-4f02-99c5-36d186f3906c DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260325T185420Z DESCRIPTION:Speaker: Matias Courdurier (Pontificia Universidad Católica de Chile)\n\nIn this talk we will discuss a paraxial approximation to the lin eartransport equation in a highly peaked forward scattering regime\, in am edium with slightly variable speed. The approximation gives rise to apropa gation model that is a variation of the Fermi pencil-beamequation with an extra term. This modified equation admits an explicitsolution\, and measur ements along all the lines traversing an unknownobject allows for an inver se problem to be posed and analyzed\, withthe goal of recovering the unkno wn attenuation\, speed and scatteringcoefficients.This is a joint work wit h Simon Arridge (UCL) and Benjamin Palacios (PUC-Chile) DTSTART;TZID=America/Los_Angeles:20260520T163000 DTEND;TZID=America/Los_Angeles:20260520T173000 LAST-MODIFIED:20260517T205623Z LOCATION:PDL C-038 SUMMARY:: Inverse problem for a transport equation pencil beam approximatio n on slightly variable speed media with peaked forward scattering TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-20/inverse-problem-transport -equation-pencil-beam-approximation-slightly-variable END:VEVENT BEGIN:VEVENT UID:854fdaca-bcd0-42b0-90a7-96ad821638fe DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260513T145759Z DESCRIPTION:Speaker: Jackson Morris\n\n'Cooperations in motivic homotopy th eory'Advisor: John Palmieri DTSTART;TZID=America/Los_Angeles:20260521T110000 DTEND;TZID=America/Los_Angeles:20260521T120000 LAST-MODIFIED:20260513T145832Z LOCATION:CDH 109 SUMMARY:: Final exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-21/final-exam END:VEVENT BEGIN:VEVENT UID:0be051fe-84c1-492e-afd7-a1b467a2ad6f DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260520T032205Z DESCRIPTION:Speaker: Ting Gong\, UW\n\nKato homology is a homological invar iant designed to measure the failure of local-to-global principles in arit hmetic geometry. Starting from the Bloch-Ogus spectral sequence for étale homology\, Kato extracted complexes whose terms are built from the Galois cohomology of the residue fields of points. The homology of these complexe s detects whether the expected Gersten-type exactness\, or equivalently a suitable cohomological Hasse principle\, holds for an arithmetic scheme. I n particular\, the zeroth Kato homology corresponds to unramified cohomolo gy.  In this talk\, I will introduce the Kato complex through the niveau s pectral sequence\, and discuss the difficulties one faces when carrying th is arithmetic construction over to the case of stacks.  DTSTART;TZID=America/Los_Angeles:20260521T150000 DTEND;TZID=America/Los_Angeles:20260521T160000 LAST-MODIFIED:20260520T032257Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar Kato homology for stacks TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-21/student-ag-seminar-kato-h omology-stacks END:VEVENT BEGIN:VEVENT UID:f6f74433-ac3e-43ac-8579-549c9aa47acd DTSTAMP:20260617T145208Z CATEGORIES:Information Sessions CLASS:PUBLIC CREATED:20260424T230501Z DESCRIPTION:Speaker: Mark Bennett\, Michael Goff\, Stark Ryan\, and Simon S picer\n\nAlumni from the UW Math Graduate Program and other universities h ave diverse career options in business\, industry\, government\, and nonpr ofit organizations.   What are these jobs like?  How do you find them?  An d\, are they interesting jobs?  To provide insight into these questions\, we will hold our annual Industrial Panel Discussion featuring four UW alum s from the PhD program.  The speakers on the panel are Mark Bennett at Boe ing\, Michael Goff at Urban Cruise Ship\,  Stark Ryan at Waymo\, and Simon Spicer at Reddit.   All are invited to attend!Biographical Sketch of the Panelists: Mark Bennett is an Applied Mathematician at Boeing. He graduate d from the UW PhD program in 2023\, and also earned his undergraduate degr ee in UW Math.  Mark collaborates with colleagues in Boeing Commercial Air lines to provide solutions to engineering problems within the company. His work has produced rigorous and practical tools that will be used in the p roduction of parts. For example\, he has implemented mixed integer formula tions of tools that were previously heuristic-based. Mark is developing sp line-based geometry comparison tools that are being leveraged in moderniza tion efforts and in validation within the design-to-build pipelines for co mposite parts. Outside of his work\, Mark spends all of his time with his one year old Mariana and Three year old Fernando.Michael Goff graduated fr om UW Math in 2010 with a focus on algebraic combinatorics\, advised by Is abella Novik. After completing a postdoctorate at Vanderbilt University\, Michael cofounded an environmental research consultancy Urban Cruise Ship. He has worked as an Energy Analyst at The Breakthrough Institute and as a fab technician at Jireh Semiconductor. Michael also conducts a Living Lit erature Review\, Scaling in Human Societies\, that is supported by a grant from Coefficient Giving. Michael's main research areas now are energy\, e nvironmentalism\, and urbanism.Stark Ryan graduated in 2022\, studying alg ebraic combinatorics under Sara Billey. She spent one year as a quantitati ve researcher at IMC Trading in Chicago\, before moving to the Bay Area to work in autonomous driving. Stark has worked on the Planner (path plannin g) teams at Ghost Autonomy and Waymo. She has been at Waymo for nearly two years\, and recently transferred to the Pittsburgh office\, where she wil l continue to work on ML model evaluation. She believes that model eval is the most exciting part of the AI/ML world!Simon Spicer graduated from UW Math in 2015 with a PhD in Computational Algebraic Number Theory\, focusin g on rational point finding algorithms for elliptic curves. He jumped stra ight into industry after graduating\, joining Meta as a Product Data Scien tist and then Data Science Manager\, where he found the skills he picked u p during his studies around scaled data analysis a good fit for measuremen t problems in the social media trust & safety space. After 7 years at Meta \, Simon did a 2-year stint at Google managing a small team of Research Da ta Scientists working on modeling problems for operating systems. And for the last 2 years he has been at Reddit\, back as an Individual Contributor in the Trust and Safety Space\, again tackling measurement\, metric\, dat a quality and transparency reporting problems. Apart from 1 year in the Ba y Area\, Simon has been based in Seattle (well\, Shoreline) throughout\, a nd still periodically visits the UW campus to reconnect with his alma mate r.Zoom option:  https://washington.zoom.us/j/99536285511This talk will be hosted by Sara Billey\, and our GSR's  Zawad Chowdhury and Patrick V O'Mel veny. DTSTART;TZID=America/Los_Angeles:20260521T160000 DTEND;TZID=America/Los_Angeles:20260521T173000 LAST-MODIFIED:20260518T204500Z LOCATION:PDL C-38 SUMMARY:: Industrial Panel 2026 TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-21/industrial-panel-2026 END:VEVENT BEGIN:VEVENT UID:968d4550-ea4b-427f-a7b7-52b387d3b597 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260518T180636Z DESCRIPTION:Speaker: Jay Reiter (UW)\n\nLast time\, I introduced Mathew's G alois theory of presentably symmetric monoidal stable \$\infty\$-categorie s\, descendability\, and chromatic Galois purity conjecture that the local ization map \$L_nR\to L_1R\$ induces an equivalence on Galois groups for e very \$\mathbb{E}_\infty\$-ring \$R\$. In this talk\, I'll discuss how too ls developed in the proof of the chromatic Nullstellensatz may be relevant to this conjecture. I'll talk about spectral Witt vectors and tilting\, t he construction of Lubin--Tate covers that detect nilpotence\, and the cir cumstances in which these covers are descendable. DTSTART;TZID=America/Los_Angeles:20260522T133000 DTEND;TZID=America/Los_Angeles:20260522T143000 LAST-MODIFIED:20260518T182704Z LOCATION:PDL C-401 SUMMARY:: DubTop Seminar Toward chromatic Galois purity II TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-22/dubtop-seminar-toward-chr omatic-galois-purity-ii END:VEVENT BEGIN:VEVENT UID:85779b5b-31b4-411c-b498-5e825a6d9289 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000641Z DESCRIPTION:Speaker: Lauren Nowak\, University of Washington\n\nWhat is a m atroid base polytope?  What properties of a matroid can we find reflected in its faces?  What happens if we start subdividing it\; what if we build other polytopes using the matroid base polytope as a building block? This talk will be a friendly introduction to some key characters and pretty res ults in matroid theory.  We will see how structural aspects of a matroid c an be captured via polytopes\, with a particular focus on the family of la ttice path matroids. Additionally\, this talk is “Taboo” themed.  Before i t begins\, the audience will get to review a list of related vocabulary wo rds and cross off any that they would like the speaker to avoid using.  Wi ll this make the talk more or less accessible? You decide!  DTSTART;TZID=America/Los_Angeles:20260522T143000 DTEND;TZID=America/Los_Angeles:20260522T153000 LAST-MODIFIED:20260521T061546Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Shapes amp Structure nbsp A potentially jargon free talk about REDACTED nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-22/1-2-3-seminar-shapes-amp- structure-nbsp-potentially-jargon-free-talk-about END:VEVENT BEGIN:VEVENT UID:9107f076-12b3-4989-8f77-acf6bf01c135 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T212130Z DESCRIPTION:Speaker: Justin Bloom\n\nTitle: Lectures on Dieudonné theory (I I)Abstract: Lectures on commutative unipotent group schemes and the Cartie r--Gabriel theorem\, and a recent theorem of Gouthier. Part II of III: The Cartier--Gabriel theorem classifies all commutative unipotent algebraic g roups as modules over the Dieudonné algebra. We will define the Dieudonné algebra\, sketch a proof of the Cartier--Gabriel theorem\, and unpack it w ith examples. DTSTART;TZID=America/Los_Angeles:20260525T113000 DTEND;TZID=America/Los_Angeles:20260525T123000 LAST-MODIFIED:20260424T212250Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-25/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:f7b8439b-af16-4086-8297-381b7f865557 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260525T155542Z DESCRIPTION:Speaker: Jihao Liu (Peking University)\n\nPre-talk: Foliations and the boundedness of algebraic varieties The MMP organizes the classific ation of algebraic varieties\, and a central theme is boundedness: varieti es with fixed invariants should fall into finitely many families. After Ha con–McKernan–Xu and Birkar this is well understood for general type and Fa no varieties\, but the picture for fibered varieties is far less complete. Aimed at a general audience\, this pre-talk explains what boundedness mea ns and why it matters\, introduces (algebraically integrable) foliations a nd adjoint foliated structures as a flexible language for studying fibrati ons\, and sets up the questions of the main talk. No prior familiarity wit h foliations is assumed. Main talk: Boundedness of stable families and alg ebraically integrable foliations I will discuss recent joint work with Pao lo Cascini\, Calum Spicer\, and Roberto Svaldi: normal projective stable f amilies of maximal variation\, of fixed dimension and bounded adjoint volu me\, are birationally bounded. This follows from a stronger intrinsic stat ement — algebraically integrable foliations of fixed dimension and bounded adjoint volume are log birationally bounded — so the birational geometry of foliations gives a systematic framework for boundedness of fibrations. A key ingredient is a proof of McKernan's ACC conjecture for interpolated log canonical thresholds of algebraically integrable foliations\, the foli ated analogue of the Shokurov ACC theorem of Hacon–McKernan–Xu. As applica tions I discuss boundedness criteria for Fano foliations and several ACC-t ype results. Builds on the MMP for adjoint foliated structures (arXiv:2408 .14258\, 2504.10737\, 2510.02498\, 2510.04419). DTSTART;TZID=America/Los_Angeles:20260526T134500 DTEND;TZID=America/Los_Angeles:20260526T153000 LAST-MODIFIED:20260525T155542Z LOCATION:PDL C-38 SUMMARY:: Boundedness of stable families and algebraically integrable folia tions TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-26/boundedness-stable-famili es-and-algebraically-integrable-foliations END:VEVENT BEGIN:VEVENT UID:d840d4e1-14dc-45a5-9ff8-8827eaf9ba9e DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260513T145646Z DESCRIPTION:Speaker: Nathan Cheung\n\n'Polytopes of Cographic Unimodular Sy stems and Valuated Delta Matroids'Advisor: Gaku Liu DTSTART;TZID=America/Los_Angeles:20260526T143000 DTEND;TZID=America/Los_Angeles:20260526T153000 LAST-MODIFIED:20260513T145749Z LOCATION:THO 334 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-26/final-exam END:VEVENT BEGIN:VEVENT UID:a1c44a2d-56f4-4841-800d-a13a09a77638 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260519T182122Z DESCRIPTION:Speaker: Eva Belmont\, CWRU\n\nSynthetic homotopy theory is a g eneral framework for constructing interesting contexts for doing homotopy theory: using the data of a spectral sequence in some category $\mathcal{C }$\, one can construct another category which can be viewed as a deformati on of $\mathcal{C}$. The motivating example of such a theory is ($p$-compl ete\, cellular) $\mathbb{C}$-motivic spectra\, which is a deformation of $ \mathcal{C}=\mathrm{Sp}$. Burklund\, Hahn\, and Senger showed that $\mathb b{R}$-motivic homotopy theory is a deformation of the category of $C_2$-eq uivariant spectra. I will discuss work in progress to construct deformatio ns of $G$-equivariant homotopy theory for other groups $G$. This is joint with Gabriel Angelini-Knoll\, Mark Behrens\, Hana Jia Kong\, and Maxwell J ohnson. DTSTART;TZID=America/Los_Angeles:20260526T153000 DTEND;TZID=America/Los_Angeles:20260526T163000 LAST-MODIFIED:20260519T182136Z LOCATION:PDL C-401 SUMMARY:: Synthetic approaches to equivariant homotopy theory TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-26/synthetic-approaches-equi variant-homotopy-theory END:VEVENT BEGIN:VEVENT UID:bdc2db10-4728-48b5-810f-004fd186be43 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260513T145955Z DESCRIPTION:Speaker: Michael Tang\n\n'On the chromatic symmetric functions of trees'Advisor: Ricky Liu DTSTART;TZID=America/Los_Angeles:20260527T160000 DTEND;TZID=America/Los_Angeles:20260527T170000 LAST-MODIFIED:20260513T150101Z LOCATION:SMI 205 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-27/final-exam END:VEVENT BEGIN:VEVENT UID:ddd8a851-de70-453a-96f7-4d0618c85d3e DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T180151Z DESCRIPTION:Speaker: Min CHEN\, U. of Oregon\n\nIn this talk\, we review cl assical results on flows by powers of the Gauss curvature in \$\mathbb{R}^ {n+1}\$. For large powers\, the equation exhibits more degeneracy\, while for small powers it becomes more singular. The critical exponent is 1/(n+2 )\, where convergence to ellipsoids was established by Andrews. For all su percritical exponent\, convergence to the sphere was proved by Andrews–Gua n–Ni and Brendle–Choi–Daskalopoulos. We then discuss the more challenging problem of evolving hypersurfaces in general ambient spaces\, where the cu rvature of the ambient manifold will interfere with the motion. Huisken in troduced a suitable “convex enough” condition\, depending on the ambient g eometry\, for mean curvature flow in general Riemannian manifolds. For flo ws by supercritical powers of the Gauss curvature in space forms\, we show that this additional “convex enough” assumption can be removed\, and we p rove convergence under the same condition imposed in \$\mathbb{R}^{n+1}\$\ , namely strict convexity of the initial hypersurface. The key is to estab lish an almost monotonicity formula and an almost invariance property. DTSTART;TZID=America/Los_Angeles:20260527T160000 DTEND;TZID=America/Los_Angeles:20260527T170000 LAST-MODIFIED:20260519T075104Z LOCATION:PDL C-38 SUMMARY:: Flow by Powers of the Gauss Curvature in Space Forms TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-27/flow-powers-gauss-curvatu re-space-forms END:VEVENT BEGIN:VEVENT UID:ce815e57-0b3d-47ca-8b2e-603a2369faf9 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260416T213239Z DESCRIPTION:Speaker: Michael Tang\, University of Washington\n\nAbstract:Th e chromatic symmetric function (CSF)\, introduced by Stanley in 1995\, is a generalization of the chromatic polynomial which enumerates proper color ings of a graph by the multiset of colors used. An open question of Stanle y asks whether the CSF distinguishes trees\; this question is extremely di fficult and we will not be resolving it. Instead\, we study it by examinin g a related graph invariant\, the generalized degree polynomial (GDP)\, in troduced by Crew and proved by Aliste-Prieto et al. to be determined by th e CSF. Unlike the CSF\, there are many known examples of non-isomorphic tr ees with equal GDPs. By defining a variant of the GDP for graphs with dist inguished vertices\, we prove a new recurrence relation for the (ordinary) GDP\, and present constructions for trees with equal GDPs which together recover almost all known examples. Our work suggests a program for attacki ng Stanley's question using the GDP as an intermediary.Note: Please note t he special location\, Smith 205. There will be no pre-seminar. The main ta lk starts at 4:10.Join Zoom Meeting: https://washington.zoom.us/j/91547335 974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260527T160000 DTEND;TZID=America/Los_Angeles:20260527T170000 LAST-MODIFIED:20260524T091308Z LOCATION:SMI 205 and via Zoom Link: https://washington.zoom.us/j/9154733597 4 SUMMARY:: On the chromatic symmetric functions of trees TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-27/chromatic-symmetric-funct ions-trees END:VEVENT BEGIN:VEVENT UID:928b99d9-6a5e-45f7-a9ea-916f7175e2ab DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260506T220459Z DESCRIPTION:Speaker: Yirong Yang\, Alex Wang\, Nelson Niu\, Michael Tang\ , Tracy Chin\, Alexander Galarraga\, Jack Kendrick\, Linhang Huang\, Vasil y Ilin\, and Hyojeong Son\n\nAbstract:    This is a two part program.   F irst\, everyone graduating with their PhD has been invited to give a short presentation of their thesis topic.   Second\, everyone has also been inv ited to give back some advice to their fellow students on how to survive a nd thrive in the phd program.    Feel free to come to either or both parts as your schedule permits.    Talks in C-38\, cookies in the lounge 15 min utes before hand.4:00-5:00ish.  3-min Talks by students 5:00ish-6:00ish.  'Things I wish I had known: advice from graduating students.'   in a panel format All are welcome to attend!   Zoom option: https://washington.zoom. us/j/99536285511This talk will be hosted by  Sara Billey and Cynthia Vinza nt.     DTSTART;TZID=America/Los_Angeles:20260528T160000 DTEND;TZID=America/Los_Angeles:20260528T180000 LAST-MODIFIED:20260518T210718Z LOCATION:Padelford C-38 and also on zoom at  https://washington.zoom.us/j/9 9536285511 SUMMARY:: 3 minute Thesis Talks and Things I wish I had known advice from g raduating students TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-28/3-minute-thesis-talks-and -things-i-wish-i-had-known-advice-graduating-students END:VEVENT BEGIN:VEVENT UID:fa10e32b-0c5d-4458-81cd-aeea77fb74c7 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20260519T180812Z DESCRIPTION:Speaker: Andrew Niu\n\nAdvisor: Rekha Thomas DTSTART;TZID=America/Los_Angeles:20260529T100000 DTEND;TZID=America/Los_Angeles:20260529T110000 LAST-MODIFIED:20260519T180936Z LOCATION:SIEG 228 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-29/general-exam END:VEVENT BEGIN:VEVENT UID:21e583cf-86c2-4036-bcb2-7755fd00ccc2 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260519T180125Z DESCRIPTION:Speaker: Begona Garcia Malaxechebarria\n\n'High-dimensional Lim it of SGD for Diagonal Linear Networks and Adaptive Learning Rate Algorith ms'Advisor: Dima Drusvyiatskiy DTSTART;TZID=America/Los_Angeles:20260529T103000 DTEND;TZID=America/Los_Angeles:20260529T113000 LAST-MODIFIED:20260519T180313Z LOCATION:ANDERSON 301 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-29/final-exam END:VEVENT BEGIN:VEVENT UID:81e3aab8-643d-40e4-9809-9cd3649dfcb0 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260522T180848Z DESCRIPTION:Speaker: Robert Burklund\, University of Copenhagen\n\nIn this talk I will present a new proof of the nilpotence and periodicity theorems of Devinatz—Hopkins—Smith. I will then survey recent advancements in alge braic geometry in chromatic characteristic  building upon this work. DTSTART;TZID=America/Los_Angeles:20260529T133000 DTEND;TZID=America/Los_Angeles:20260529T143000 LAST-MODIFIED:20260522T180857Z LOCATION:PDL C-401 SUMMARY:: Nilpotence and periodicity revisited TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-29/nilpotence-and-periodicit y-revisited END:VEVENT BEGIN:VEVENT UID:c5c39797-0849-497b-b5b0-595bfd084054 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000743Z DESCRIPTION:Speaker: Clare Minnerath\, University of Washington\n\nI’ll ask you questions\, several starting with “how many”\, that will lead us thro ugh what is known and unknown about counting Schubert objects. DTSTART;TZID=America/Los_Angeles:20260529T143000 DTEND;TZID=America/Los_Angeles:20260529T153000 LAST-MODIFIED:20260528T224132Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Enumeration of Pipe Dreams nbsp TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-05-29/1-2-3-seminar-enumeration -pipe-dreams-nbsp END:VEVENT BEGIN:VEVENT UID:3b66312e-169d-421f-9a0c-931888495fd1 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260519T175855Z DESCRIPTION:Speaker: Junaid Hasan\n\n'Cohomology\, Volumes\, and Theta Char acteristics on Metric Graphs'Advisor: Farbod Shokrieh DTSTART;TZID=America/Los_Angeles:20260601T100000 DTEND;TZID=America/Los_Angeles:20260601T110000 LAST-MODIFIED:20260529T201509Z LOCATION:SAV 131 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-01/final-exam END:VEVENT BEGIN:VEVENT UID:40a853eb-0df8-4eb7-a2af-9f5dc90d296b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260424T212728Z DESCRIPTION:Speaker: Justin Bloom\n\nTitle: Lectures on Dieudonné theory (I II)Abstract: Lectures on commutative unipotent group schemes and the Carti er--Gabriel theorem\, and a recent theorem of Gouthier. Part III of III: G outhier recently classified infinitesimal commutative group schemes with a one-dimensional Lie algebra\, using Dieudonné theory to give explicit con structions. We will go over these constructions\, and also give some appli cations to representation theory that I've been working toward.  DTSTART;TZID=America/Los_Angeles:20260601T113000 DTEND;TZID=America/Los_Angeles:20260601T123000 LAST-MODIFIED:20260424T212728Z LOCATION:PDL C-401 SUMMARY:: StARTS Student Algebra and Representation Theory Seminar TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-01/starts-student-algebra-an d-representation-theory-seminar END:VEVENT BEGIN:VEVENT UID:0d12b11d-9592-485c-abaa-c4f122190db7 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001028Z DESCRIPTION:AGENDA Call to OrderChair's Remarks: 5 minutesAnnouncements: 10 minutesMaster's Program - PalConsent AgendaCommittee Reports: 25 minutesG raduate Program - Pevtsova (10 minutes)Graduate Admissions - Steinerberger (5 minutes)Career Development - Billey (10 minutes)Report from the GSR: 5 minutesDiscussion of service: 15 minutesNew BusinessExecutive Session (5 minutes)Adjournment DTSTART;TZID=America/Los_Angeles:20260602T110000 DTEND;TZID=America/Los_Angeles:20260602T120000 LAST-MODIFIED:20260601T175034Z LOCATION:HUB 214 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-02/faculty-meeting END:VEVENT BEGIN:VEVENT UID:57696ae1-8c5d-46ef-90d7-4ccad85bc76d DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20260526T190926Z DESCRIPTION:Speaker: Arkamouli Debnath\n\nAdvisors: Max Lieblich and Jarod Alper DTSTART;TZID=America/Los_Angeles:20260602T143000 DTEND;TZID=America/Los_Angeles:20260602T153000 LAST-MODIFIED:20260526T191017Z LOCATION:PDL C38 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-02/general-exam-0 END:VEVENT BEGIN:VEVENT UID:18d1e35e-9c2e-4bd4-81f5-68e6ed8d1a98 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260522T173621Z DESCRIPTION:Speaker: Dan Berwick-Evans\, UIUC\n\nI’ll give a leisurely intr oduction to the long-standing goal of constructing a geometric model for e lliptic cohomology from the materials of 2-dimensional quantum field theor y. This will include some history of the problem\, an overview of the math ematical structures involved\, and why you should care about the outcome. DTSTART;TZID=America/Los_Angeles:20260602T153000 DTEND;TZID=America/Los_Angeles:20260602T163000 LAST-MODIFIED:20260530T190218Z LOCATION:PDL C-401 SUMMARY:: What is the Segal Stolz Teichner program TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-02/what-segal-stolz-teichner -program END:VEVENT BEGIN:VEVENT UID:32c0e567-9c54-429b-a239-9f5684b85d8a DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260526T191619Z DESCRIPTION:Speaker: Alexander Waugh\n\n'Eulerian Power Operations'Advisor: John Palmieri DTSTART;TZID=America/Los_Angeles:20260603T100000 DTEND;TZID=America/Los_Angeles:20260603T110000 LAST-MODIFIED:20260526T191656Z LOCATION:LOW 206 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-03/final-exam-0 END:VEVENT BEGIN:VEVENT UID:e7554034-a8a4-49f1-a9da-0a5a59a8f77a DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260519T000936Z DESCRIPTION:Speaker: Chi-Fang (Anthony) Chen\n\nRecently\, quantum analogs of classical Gibbs samplers have been introduced—quantum Markov chains tha t generalize Glauber or Metropolis dynamics and serve as models of nature’ s thermalization process. In this work\, we show that every one-dimensiona l quantum Hamiltonian (spin chains) with short-range interactions admits a quantum Gibbs sampler with a system-size independent\, optimal spectral g ap at all finite temperatures. As a consequence\, their Gibbs states can b e prepared in polylogarithmic depth and exhibit exponential clustering of correlations\, extending the classic result of Araki (1969).  DTSTART;TZID=America/Los_Angeles:20260603T153000 DTEND;TZID=America/Los_Angeles:20260603T163000 LAST-MODIFIED:20260528T135754Z LOCATION:DEN 111 SUMMARY:: Fast mixing of quantum spin chains at any temperature TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-03/fast-mixing-quantum-spin- chains-any-temperature END:VEVENT BEGIN:VEVENT UID:8ba63fe2-c8dd-46c6-9573-9051a8a3884d DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260526T191321Z DESCRIPTION:Speaker: Natasha Crepeau\n\n'Constructing stability conditions on nodal curves from subdivisions of Lawrence polytopes'Advisor: Farbod Sh okrieh DTSTART;TZID=America/Los_Angeles:20260603T160000 DTEND;TZID=America/Los_Angeles:20260603T170000 LAST-MODIFIED:20260529T171132Z LOCATION:SMI 205 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-03/final-exam END:VEVENT BEGIN:VEVENT UID:b1a5beef-23c3-456b-a97e-fc02aeff2d02 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260416T213316Z DESCRIPTION:Speaker: Natasha Crepeau\, University of Washington\n\nAbstract :A stability condition on a nodal curve \$X\$ is the assignment of integer s to the nontrivial biconnected subcurves of \$X\$ satisfying some desired properties\; equivalently\, it is an assignment of integers to the biconn ected subsets of vertices of a graph \$G\$\, where \$G\$ is the graph dual to \$X\$. In this talk\, we'll study the combinatorics of these stability conditions\, and provide a construction of these stability conditions fro m subdivisions of the Lawrence polytope of the oriented cographic matroid \$M^*(G)\$ using the theory of single-element extensions of oriented matro ids. We will also discuss connections to chip-firing on graphs through the theory of generalized break divisors. Finally\, we'll discuss the limitat ions of our combinatorial approach\, and some future directions of study.N ote: Please note the special location\, Smith 205. There will be no pre-se minar. The main talk starts at 4:10.Join Zoom Meeting: https://washington. zoom.us/j/91547335974Meeting ID: 915 4733 5974 DTSTART;TZID=America/Los_Angeles:20260603T160000 DTEND;TZID=America/Los_Angeles:20260603T170000 LAST-MODIFIED:20260530T042357Z LOCATION:SMI 205 and via Zoom Link: https://washington.zoom.us/j/9154733597 4 SUMMARY:: Constructing stability conditions on nodal curves from subdivisio ns of Lawrence polytopes TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-03/constructing-stability-co nditions-nodal-curves-subdivisions-lawrence-polytopes END:VEVENT BEGIN:VEVENT UID:35801ffb-ad9a-4ece-b355-8f6c35293a49 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260601T192029Z DESCRIPTION:Speaker: Zachary Gardner\, TU Darmstadt\n\nDrawing inspiration from pioneering work of Simpson on de Rham cohomology\, recent work of Dri nfeld and Bhatt-Lurie explores how a rich assortment of cohomology theorie s can be geometrized via a process known as transmutation. In this talk\, my aim is to highlight interesting applications of transmutation. As time allows\, I will explain a novel approach to filtered prismatization and ho w it gives way to a theory of filtered prisms. This is based on joint work with Keerthi Madapusi. DTSTART;TZID=America/Los_Angeles:20260604T150000 DTEND;TZID=America/Los_Angeles:20260604T160000 LAST-MODIFIED:20260601T192029Z LOCATION:PDL C-401 SUMMARY:: Student AG Seminar The magic of transmutation TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-04/student-ag-seminar-magic- transmutation END:VEVENT BEGIN:VEVENT UID:855ba077-97fc-4474-9062-aac8cfc5b9d4 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260529T164627Z DESCRIPTION:Speaker: Nelson Niu\n\n'A Categorical Framework for Coherence T heorems'Advisor: Danny Shi DTSTART;TZID=America/Los_Angeles:20260605T100000 DTEND;TZID=America/Los_Angeles:20260605T110000 LAST-MODIFIED:20260529T164709Z LOCATION:SIG 226 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-05/final-exam-0 END:VEVENT BEGIN:VEVENT UID:fffbeaee-fda0-470e-89ac-c3fb6c714ff0 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260526T185853Z DESCRIPTION:Speaker: Vasily Ilin\n\n'Neural Methods for Plasma Simulation a nd Mathematical Formalization'Advisors: Jingwei Hu and Jarod Alper DTSTART;TZID=America/Los_Angeles:20260605T140000 DTEND;TZID=America/Los_Angeles:20260605T150000 LAST-MODIFIED:20260526T185937Z LOCATION:SMI 307 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-05/final-exam END:VEVENT BEGIN:VEVENT UID:e875e380-74c5-4f5d-adcc-c242f1a1779a DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260501T003556Z DESCRIPTION:Speaker: Vasily Ilin\n\nVasily Ilin's PhD defense.I will summar ize my PhD research\, concentrating on two areas: machine learning for pla sma simulation\, and AI for formalizing mathematics in Lean. DTSTART;TZID=America/Los_Angeles:20260605T140000 DTEND;TZID=America/Los_Angeles:20260605T160000 LAST-MODIFIED:20260501T003556Z LOCATION:SMI 307 SUMMARY:: Neural Methods for Plasma Simulation and Mathematical Formalizati on TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-05/neural-methods-plasma-sim ulation-and-mathematical-formalization END:VEVENT BEGIN:VEVENT UID:d4384dd7-ad4c-4f1c-a473-7ab0dcfc4c37 DTSTAMP:20260617T145208Z CATEGORIES:Seminars\, Student Activities CLASS:PUBLIC CREATED:20260405T000844Z DESCRIPTION:Speaker: Jenny Zhan\, University of Washington\n\n(No prior kno wledge on graph coloring required.)A proper coloring of a graph is a way t o assign a color to each vertex such that no adjacent vertices are assigne d the same color. This talk has nothing to do with this kind of coloring.  Instead\, I will introduce some color theory and some basics of digital ar t from a mathematical perspective. We will see how understanding the mathe matics behind color and layering effects can explain a variety of coloring \, rendering\, and photo editing techniques.This is a pictionary talk\, al l slides will be pictures.  DTSTART;TZID=America/Los_Angeles:20260605T143000 DTEND;TZID=America/Los_Angeles:20260605T153000 LAST-MODIFIED:20260604T110959Z LOCATION:PDL C-401 SUMMARY:: 1 2 3 Seminar Color Theory and Digital Art 101 TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-05/1-2-3-seminar-color-theor y-and-digital-art-101 END:VEVENT BEGIN:VEVENT UID:b5aa2790-8902-4bef-8e23-5503b17404d1 DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260602T220824Z DESCRIPTION:Speaker: Hyojeong Son\n\n'Discrete Probability and Interacting Particle Systems'Advisor: Chris Hoffman DTSTART;TZID=America/Los_Angeles:20260608T140000 DTEND;TZID=America/Los_Angeles:20260608T150000 LAST-MODIFIED:20260602T220920Z LOCATION:HRC 135 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-08/final-exam END:VEVENT BEGIN:VEVENT UID:15652e8a-64a6-43b3-9db6-91df80986de9 DTSTAMP:20260617T145208Z CATEGORIES:Academic Calendar\, Student Activities CLASS:PUBLIC CREATED:20260522T001542Z DTSTART;TZID=America/Los_Angeles:20260608T173000 DTEND;TZID=America/Los_Angeles:20260608T190000 LAST-MODIFIED:20260522T001542Z LOCATION:Odegaard OUGL-136 and 141 SUMMARY:: WXML and Math AI Lab poster session TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-08/wxml-and-math-ai-lab-post er-session END:VEVENT BEGIN:VEVENT UID:8d0a2257-70df-4387-a193-8b28bf98ede3 DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20260520T195610Z DESCRIPTION:Speaker: Lauren Nowak\n\nAdvisor: Gaku Liu DTSTART;TZID=America/Los_Angeles:20260609T140000 DTEND;TZID=America/Los_Angeles:20260609T150000 LAST-MODIFIED:20260601T231545Z LOCATION:SAV 166 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-09/general-exam-0 END:VEVENT BEGIN:VEVENT UID:ae2e2dc2-9ab4-4778-a429-ec38738efebb DTSTAMP:20260617T145208Z CATEGORIES:General Exam CLASS:PUBLIC CREATED:20260526T155247Z DESCRIPTION:Speaker: Lauren Nowak\n\nAdvisor: Gaku Liu DTSTART;TZID=America/Los_Angeles:20260609T140000 DTEND;TZID=America/Los_Angeles:20260609T150000 LAST-MODIFIED:20260526T155325Z LOCATION:SAV 166 SUMMARY:: General Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-09/general-exam END:VEVENT BEGIN:VEVENT UID:70834ce1-9f02-4c9b-bbcf-a9b8acc5bf6d DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260529T164358Z DESCRIPTION:Speaker: Caelan Ritter\n\n'Intersection theory on tropical abel ian varieties'Advisor: Farbod Shokrieh DTSTART;TZID=America/Los_Angeles:20260610T100000 DTEND;TZID=America/Los_Angeles:20260610T110000 LAST-MODIFIED:20260529T164500Z LOCATION:PDL C-401 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-10/final-exam END:VEVENT BEGIN:VEVENT UID:a445ba56-d3c3-4bb0-8d8a-d0835d9ea37f DTSTAMP:20260617T145208Z CATEGORIES:Ceremonies CLASS:PUBLIC CREATED:20260601T231340Z DESCRIPTION:Congratulations to the Math Department's undergraduate graduati ng class of 2026!More details here: https://math.washington.edu/math-depar tment-undergraduate-graduation-ce…Students\, RSVP for the celebration DTSTART;TZID=America/Los_Angeles:20260610T100000 DTEND;TZID=America/Los_Angeles:20260610T110000 LAST-MODIFIED:20260601T231503Z LOCATION:HUB Lyceum SUMMARY:: Math Undergraduate Graduation Celebration TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-10/math-undergraduate-gradua tion-celebration END:VEVENT BEGIN:VEVENT UID:bffcb328-39fa-4404-aae5-dda8bb9c859b DTSTAMP:20260617T145208Z CATEGORIES:Final Exam CLASS:PUBLIC CREATED:20260602T220929Z DESCRIPTION:Speaker: Madeline Brown\n\n'Quadrature Domains and Limit Shapes for Activated Random Walk in One Dimension'Advisor: Chris Hoffman DTSTART;TZID=America/Los_Angeles:20260611T130000 DTEND;TZID=America/Los_Angeles:20260611T140000 LAST-MODIFIED:20260602T221011Z LOCATION:CLK 219 SUMMARY:: Final Exam TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-11/final-exam END:VEVENT BEGIN:VEVENT UID:a05f58a5-b47c-4c35-98d4-2ed81a0ffeb5 DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260615T162236Z DESCRIPTION:Speaker: Andrea Ottolini\, University of Alabama\n\nTBD  DTSTART;TZID=America/Los_Angeles:20260629T143000 DTEND;TZID=America/Los_Angeles:20260629T153000 LAST-MODIFIED:20260615T162236Z LOCATION:SAV 168 SUMMARY:: TBD TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-06-29/tbd END:VEVENT BEGIN:VEVENT UID:184a2cba-16fd-4e2a-9b78-bce54294a1f6 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001037Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaC ommittee ReportsReport from the GSRNew BusinessExecutive SessionAdjournmen t DTSTART;TZID=America/Los_Angeles:20260929T110000 DTEND;TZID=America/Los_Angeles:20260929T120000 LAST-MODIFIED:20260113T062344Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-09-29/faculty-meeting END:VEVENT BEGIN:VEVENT UID:c27f55b4-eae3-473c-9aff-c477174091be DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001214Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaC ommittee ReportsReport from the GSRNew BusinessExecutive SessionAdjournmen t DTSTART;TZID=America/Los_Angeles:20261006T110000 DTEND;TZID=America/Los_Angeles:20261006T120000 LAST-MODIFIED:20260113T062425Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-10-06/faculty-meeting END:VEVENT BEGIN:VEVENT UID:8affbd29-710e-4a83-8b79-31c642c7cce1 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia\, Seminars\, Special Events\, Student Activities CLASS:PUBLIC CREATED:20260501T162938Z DTSTART;TZID=America/Los_Angeles:20261016T153000 DTEND;TZID=America/Los_Angeles:20261016T163000 LAST-MODIFIED:20260501T162938Z LOCATION:ECE 125 SUMMARY:: TBD TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-10-16/tbd END:VEVENT BEGIN:VEVENT UID:3ec45364-f7da-47b2-99c4-5e8c139542e9 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001239Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaC ommittee ReportsReport from the GSRNew BusinessExecutive SessionAdjournmen t DTSTART;TZID=America/Los_Angeles:20261103T110000 DTEND;TZID=America/Los_Angeles:20261103T120000 LAST-MODIFIED:20260113T062449Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-11-03/faculty-meeting END:VEVENT BEGIN:VEVENT UID:5eae2c56-5204-469f-a98d-f1bd78cb39b1 DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20260304T175141Z DTSTART;TZID=America/Los_Angeles:20261106T153000 DTEND;TZID=America/Los_Angeles:20261106T163000 LAST-MODIFIED:20260304T175847Z LOCATION:ECE 125 SUMMARY:: TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-11-06/tba END:VEVENT BEGIN:VEVENT UID:e303a236-eb3e-4c47-a65f-2f7dbfc86b7e DTSTAMP:20260617T145208Z CATEGORIES:Colloquia CLASS:PUBLIC CREATED:20251201T213839Z DTSTART;TZID=America/Los_Angeles:20261120T153000 DTEND;TZID=America/Los_Angeles:20261120T163000 LAST-MODIFIED:20251201T214329Z LOCATION:ECE 125 SUMMARY:: TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-11-20/tba END:VEVENT BEGIN:VEVENT UID:b26e2d50-973b-4099-9600-5fd584201265 DTSTAMP:20260617T145208Z CATEGORIES:Faculty Meetings CLASS:PUBLIC CREATED:20251121T001253Z DESCRIPTION:AGENDA Call to OrderChair's RemarksAnnouncementsConsent AgendaC ommittee ReportsReport from the GSRNew BusinessExecutive SessionAdjournmen t DTSTART;TZID=America/Los_Angeles:20261201T110000 DTEND;TZID=America/Los_Angeles:20261201T120000 LAST-MODIFIED:20260113T062515Z LOCATION:PDL C-38 SUMMARY:: Faculty Meeting TRANSP:OPAQUE URL:https://math.washington.edu/events/2026-12-01/faculty-meeting END:VEVENT BEGIN:VEVENT UID:e4a0c449-d880-49d0-8f7d-e6b479cd8c2b DTSTAMP:20260617T145208Z CATEGORIES:Seminars CLASS:PUBLIC CREATED:20260609T081506Z DESCRIPTION:Speaker: Zhihan Wang (Cornell)\n\nTBA DTSTART;TZID=America/Los_Angeles:20270217T160000 DTEND;TZID=America/Los_Angeles:20270217T170000 LAST-MODIFIED:20260609T081506Z LOCATION:PDL C-038 SUMMARY:: TBA TRANSP:OPAQUE URL:https://math.washington.edu/events/2027-02-17/tba END:VEVENT END:VCALENDAR