過去の記録 ~09/22次回の予定今後の予定 09/23~


16:30-17:30   数理科学研究科棟(駒場) 370号室
O. Emanouilov 氏 (Colorado State University)
Partial Cauchy data for general second order elliptic operators in two dimensions
[ 講演概要 ]
We consider the problem of determining the coefficients of a first-order perturbation of the Laplacian in two dimensions by measuring the corresponding Cauchy data on an arbitrary open subset of the boundary. From this information we obtained a coupled PDE system of first order which the coefficients satisfy. As a corollary we show for the magnetic Schr"odinger equation that the magnetic field and the electric potential are uniquely determined by measuring the partial Cauchy data on an arbitrary part of the boundary. We also show that the coefficients of any real vector field perturbation of the Laplacian, the convection terms, are uniquely determined by their partial Cauchy data.