A SURVEY ON THE KREIN–VON NEUMANN EXTENSION, THE CORRESPONDING ABSTRACT BUCKLING PROBLEM, AND WEYL-TYPE SPECTRAL ASYMPTOTICS FOR PERTURBED KREIN LAPLACIANS IN NONSMOOTH DOMAINS (2012)

by Mark S. Ashbaugh , Fritz Gesztesy , Marius Mitrea , Roman Shterenberg , Gerald Teschl