Partial Data for the Neumann-Dirichlet Magnetic Schr\"odinger Inverse   Problem
  We show that an electric potential and magnetic field can be uniquely determined by partial boundary measurements of the Neumann-to-Dirichlet map of the associated magnetic Schr\"{o}dinger operator. This improves upon previous results of the author by including the determination of a magnetic field. The main technical advance is an improvement on the Carleman estimate for the magnetic Schr\"{o}dinger operator with the appropriate boundary conditions. This allows the construction of complex geometrical optics solutions with greater regularity, which are needed to deal with the first order term in the operator. This improved regularity of CGO solutions may have applications in the study of inverse problems in systems of equations with partial boundary data. 
Francis J. Chung
math.AP