2 papers
math-ph2026
Robin Laplacians with point interactions on unbounded domains: discrete spectrum and coupling asymptotics
Diego Noja, Francesco Raso Stoia
We investigate the discrete spectrum of finitely many point interactions for Neumann and Robin Laplacians on special unbounded and exterior domains in dimensions two and…
math-ph2026
The Dirichlet Laplacian with a point interaction on unbounded Lipschitz domains
Diego Noja, Francesco Raso Stoia
We study one-centre point interactions for the Dirichlet Laplacian on unbounded domains in dimensions two and three, with emphasis on exterior domains and special Lipschitz domains…