Professor

### Fields of Interest

### Biography

PhD, Hebrew University, 1999

### Courses Taught

### Autumn 2024

### Spring 2024

### Winter 2024

- MATH 550 B: Seminar in Geometry
- MATH 562 A: Foundations of Combinatorics
- MATH 580 A: Current Topics in Mathematics

### Autumn 2023

### Spring 2023

### Winter 2023

- MATH 327 A: Introductory Real Analysis I
- MATH 327 B: Introductory Real Analysis I
- MATH 550 B: Seminar in Geometry
- MATH 574 A: Fundamental Concepts of Analysis
- MATH 574 B: Fundamental Concepts of Analysis

### Autumn 2022

### Spring 2022

### Winter 2022

### Autumn 2021

### Spring 2021

### Winter 2021

### News & Events

### Related News

- Amzi Jeffs named NSF Graduate Fellow (April 19, 2018)
- New AMS Fellows (November 1, 2016)

### Related Events

- Combinatorics and Geometry Seminar: Tree bijections -
December 4 2024, 3:30pm - Combinatorics and Geometry Seminar: Combinatorial statistics and the q,t-Catalan numbers -
November 20 2024, 3:30pm - Combinatorics and Geometry Seminar: On e-positivity of the chromatic symmetric function -
November 13 2024, 3:30pm - Combinatorics and Geometry Seminar: Chromatic Symmetric Functions and Polynomial Invariants of Trees -
November 6 2024, 3:30pm - Combinatorics and Geometry Seminar: Log-Concavity of the Alexander Polynomial for Special Alternating Links -
October 30 2024, 3:30pm - Combinatorics and Geometry Seminar: Smooth Points on Positroid Varieties -
October 23 2024, 3:30pm - Combinatorics and Geometry Seminar: Cyclically ordered quivers -
October 16 2024, 3:30pm - Combinatorics and Geometry Seminar: Standard monomials for positroid varieties -
October 9 2024, 3:30pm - Combinatorics and Geometry Seminar: Dissecting an Integer Polymatroid -
May 29 2024, 3:30pm - Combinatorics and Geometry Seminar: Colorful Permutation Statistics and Cycle Type -
May 22 2024, 3:30pm - Combinatorics and Geometry Seminar: The merging operation and (d-i)-simplicial i-simple d-polytopes -
May 15 2024, 3:30pm - Combinatorics and Geometry Seminar: h-vector Inequalities Under Weak Maps -
May 8 2024, 4:10pm - Combinatorics and Geometry Seminar: The inhomogeneous multispecies PushTASEP and Macdonald polynomials -
May 1 2024, 3:30pm - Combinatorics and Geometry Seminar: Smooth Combinatorial Cubes are IDP -
April 24 2024, 4:10pm - Career Transitions: Surviving and Thriving in the First Year of Grad School -
April 18 2024, 4:30pm - Combinatorics and Geometry Seminar: Shuffle bases and quasisymmetric power sums -
April 17 2024, 3:30pm - Combinatorics and Geometry Seminar: The Poincare-Extended ab-Index -
April 10 2024, 3:30pm - Combinatorics and Geometry Seminar: Increasing subsequences, orbit harmonics, and shadow play -
April 3 2024, 3:30pm - Combinatorics and Geometry Seminar: The first bijective proof of the ASM theorem -
March 6 2024, 3:30pm - Combinatorics and Geometry Seminar: Incidences and Tilings -
February 28 2024, 3:30pm - Combinatorics and Geometry Seminar: Solving puzzles of shellable simplicial spheres -
February 21 2024, 4:10pm - Combinatorics and Geometry Seminar: Moshe's Insanity -
February 14 2024, 3:30pm - CANCELED: Combinatorics and Geometry Seminar: The Poincare-Extended ab-Index -
February 7 2024, 3:30pm - Combinatorics and Geometry Seminar: Tropicalization of the principal minors of positive semidefinite matrices -
January 31 2024, 3:30pm - Combinatorics and Geometry Seminar: Farahat-Higman Algebras for Classical Linear Groups -
January 24 2024, 3:30pm - Combinatorics and Geometry Seminar: Distributional properties of colored multiset Eulerian polynomials -
January 17 2024, 3:30pm - Combinatorics and Geometry Seminar: A regular unimodular triangulation of the matroid base polytope -
January 10 2024, 3:30pm - Combinatorics and Geometry Seminar: Numerical semigroups, minimal presentations, and posets -
December 6 2023, 3:30pm - Combinatorics and Geometry Seminar: A noncommutative Schur function approach to chromatic symmetric functions -
November 29 2023, 3:30pm - Combinatorics and Geometry Seminar: Extremal crystals and atom-positivity -
November 8 2023, 3:30pm - Combinatorics and Geometry Seminar: Matroid Schubert varieties and equivariant compactifications -
November 1 2023, 3:30pm - Combinatorics and Geometry Seminar: Quantum Bruhat graphs and tilted Richardson varieties -
October 25 2023, 3:30pm - Current Topics Seminar: The fascinating world of polytopes -
October 19 2023, 4:30pm - Combinatorics and Geometry Seminar: Snake Graphs for Graph LP Algebras -
October 18 2023, 3:30pm - Combinatorics and Geometry Seminar: Projections of Richardson Varieties -
October 11 2023, 3:30pm - Combinatorics and Geometry Seminar: Face Numbers and Angles of Polytopes -
October 4 2023, 3:30pm - Combinatorics and Geometry Seminar: Combinatorics of two-boundary Temperley-Lieb algebras -
May 31 2023, 3:30pm - Combinatorics and Geometry Seminar: Combinatorics of CAT(0) cubical complexes, crossing complexes and co-skeletons -
May 24 2023, 3:30pm - Combinatorics and Geometry Seminar: Central transversals and hyperplane arrangements -
May 17 2023, 3:30pm - Combinatorics and Geometry Seminar: Tautological classes of matroids -
May 10 2023, 3:30pm - Combinatorics and Geometry Seminar: Mixed Volumes of Normal Complexes -
May 3 2023, 3:30pm - Combinatorics and Geometry Seminar: Chip-firing game on metric graphs and combinatorics of their Jacobians -
April 26 2023, 3:30pm - Combinatorics and Geometry Seminar: SL_4 web bases from hourglass plabic graphs -
April 19 2023, 3:30pm - Combinatorics and Geometry Seminar: The Polyhedral Combinatorics of Pivot Rules -
April 12 2023, 3:30pm - Combinatorics and Geometry Seminar: Higher Weak Order of Affine Permutations -
March 8 2023, 4pm - Combinatorics and Geometry Seminar: Algebra, Geometry & Combinatorics of the Pinhole Camera -
March 1 2023, 4pm - Combinatorics and Geometry Seminar: The geometric method, matroids and related simplicial complexes -
February 22 2023, 4pm - Combinatorics and Geometry Seminar: Vertex labeling properties on graphs and complexes -
February 15 2023, 4pm - Combinatorics and Geometry Seminar: Combinatorial mutations and birational maps -
February 1 2023, 4pm - Combinatorics and Geometry Seminar: Unimodular triangulations of sufficiently large dilations -
January 25 2023, 4pm - Combinatorics and Geometry Seminar: Transfer systems and model structures for combinatorialists -
January 18 2023, 4pm - Combinatorics and Geometry Seminar: Problems around Combinatorial Graphs and Distance Geometry -
January 11 2023, 4pm - Combinatorics and Geometry Seminar: Subdivisions of Shellable Complexes -
December 7 2022, 3:30pm - Combinatorics and Geometry Seminar: Odd diagrams and patterns -
November 30 2022, 3:30pm - Combinatorics and Geometry Seminar: 3D plabic graphs and cluster structures on type A braid varieties -
November 16 2022, 3:30pm - Combinatorics and Geometry Seminar: 2-LC triangulated manifolds are exponentially many -
November 9 2022, 3:30pm - Combinatorics and Geometry Seminar: On the anisotropy theorem of Papadakis and Petrotou -
November 2 2022, 3:30pm - Combinatorics and Geometry Seminar: Enumerating interval graphs and d-representable complexes -
October 26 2022, 3:30pm - Combinatorics and Geometry Seminar: Hurwitz numbers via topological recursion -
October 19 2022, 3:30pm - Combinatorics and Geometry Seminar: A Pattern Avoidance Criteria for Smoothness of Positroid Varieties Via Decorated Permutations, Spirographs, and Johnson Graphs -
October 12 2022, 4:30pm - Combinatorics and Geometry Seminar: Maximal Chain Descent Orders -
October 5 2022, 3:30pm - Combinatorics and Geometry Seminar: Flavors of the Fubini-Bruhat Order -
June 1 2022, 4pm - Combinatorics and Geometry Seminar: Higher Categorical Associahedra -
May 25 2022, 3:30pm - Combinatorics and Geometry Seminar: Pattern-avoiding parking functions -
May 18 2022, 3:30pm - Combinatorics and Geometry Seminar: Graph limits and graph homomorphism inequalities -
May 11 2022, 3:30pm - Combinatorics and Geometry Seminar: A Proof of Grünbaum’s Lower Bound Conjecture for polytopes, lattices, and strongly regular pseudomanifolds -
May 4 2022, 3:30pm - Combinatorics and Geometry Seminar: q-Whittaker functions, finite fields, and Jordan forms -
April 27 2022, 3:30pm - Combinatorics and Geometry Seminar: Grothendieck-to-Lascoux Expansions -
April 13 2022, 3:30pm - Combinatorics and Geometry Seminar: Linear relations among Schubert structure coefficients -
April 6 2022, 3:30pm - Combinatorics and Geometry Seminar: Planar Tanglegram Layouts and Edge Insertion -
February 16 2022, 3:30pm - Combinatorics and Geometry Seminar: Common tangents to polytopes and convex bodies -
February 9 2022, 3:30pm - Combinatorics and Geometry Seminar: Non-realizability of polytopes via linear programming -
February 2 2022, 3:30pm - Combinatorics and Geometry Seminar: Braiding and twisting open positroid varieties -
January 19 2022, 3:30pm - Combinatorics and Geometry Seminar: From symmetric functions, to knots, and back again -
December 8 2021, 3:30pm - CANCELED: Combinatorics and Geometry Seminar: Braiding and twisting open positroid varieties -
December 1 2021, 3:30pm - Combinatorics and Geometry Seminar: Multiplicities of maximal dominant weights of some affine Lie algebra modules -
November 29 2021, 4:10pm - Combinatorics and Geometry Seminar: When is the probability of avoiding a graph super-exponentially small? -
November 17 2021, 3:30pm - Combinatorics and Geometry Seminar: Helly type problems: topology, the cascade conjecture, and graph coloring -
November 10 2021, 3:30pm - Combinatorics and Geometry Seminar: Combinatorial atlas for log-concave inequalities -
November 3 2021, 3:30pm - Combinatorics and Geometry Seminar: Bumpless pipe dreams encode Gröbner geometry of Schubert polynomials -
October 27 2021, 3:30pm - Combinatorics and Geometry Seminar:
*f**- and*h**-vectors -October 20 2021, 3:30pm - Combinatorics and Geometry Seminar: P-partition generating functions of naturally labeled posets -
October 13 2021, 3:30pm - Current Topics Seminar: Session 1 -
October 8 2020, 4:30pm - Current Topics Seminar: Polytopes versus centrally symmetric polytopes -
May 18 2017, 4pm