The forward problem for the electromagnetic Helmholtz equation with   critical singularities
  We study the forward problem of the magnetic Schr\"odinger operator with potentials that have a strong singularity at the origin. We obtain new resolvent estimates and give some applications on the spectral measure and on the solutions of the associated evolution problem. 
Juan Antonio Barcel\'o, Luis Vega and Miren Zubeldia
math.AP