On the many Dirichlet Laplacians on a non-convex polygon and their approximations by point interactions

Andrea Posilicano

By Birman and Skvortsov it is known that if $\Omegasf$ is a planar curvilinear polygon with $n$ non-convex corners then the Laplace operator with domain $H^2(\Omegasf)\cap H^1_0(\O…