Spectral Theory, Microlocal Analysis, Singular Manifolds

"Advances in Partial Differential Equations" is a series originating from the work of the Max Planck Research Group for Partial Differential Equations and Complex Analysis at the University of Potsdam, Germany. The text seeks to promote expositions of a systematic character in the field of partial differential equations. The articles are largely self-contained and written for a wide readership by specialists who will report on recent progress and give specific insight into their own work.