Finite speed of propagation and local boundary conditions for wave equations with point interactions

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/108794We show that the boundary conditions entering in the definition of the self-adjoint operator describing the Laplacian plus a finite number of point interactions are local if and only if the corresponding wave equation has finite speed of propagationMathematical PhysicsAnalysis of PDEsFinite speed of propagation and local boundary conditions for wave equations with point interactionstext