Exponential instability in an inverse problem for the Schrodinger equation

2006-01-16T10:42:40Z (GMT) by N. Mandache
We consider the problem of the determination of the potential from the Dirichlet to Neumann map of the Schrodinger operator.We show that this problem is severely ill posed. The results extend to the electrical impedance tomography.They show that the logarithmic stability results of Alessandrini are optimal.