%0 Journal Article %T Determining a magnetic Schroedinger operator from partial Cauchy data %A David Dos Santos Ferreira %A Carlos Kenig %A Johannes Sjoestrand %A Gunther Uhlmann %J Mathematics %D 2006 %I arXiv %X In this paper we show, in dimension n >=3, that knowledge of the Cauchy data for the Schroedinger equation in the presence of a magnetic potential, measured on possibly very small subsets of the boundary, determines uniquely the magnetic field and the electric potential. %U http://arxiv.org/abs/math/0601466v1