Abstract: We show that the knowledge of Dirichlet to Neumann map for rough A and q in
(−∆)m + A · D + q for m ≥ 2 for a bounded domain in \$R^n\$, n ≥ 3 determines A and q uniquely.
The unique identifiability is proved using property of products of functions in Sobolev spaces and
constructing complex geometrical optics solutions with sufficient decay of remainder terms.
(Joint work with Y. Assylbekov)