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Wave Equations with Point Interactions in Finite Energy Space
Massimo Bertini, Diego Noja, Andrea Posilicano
Given the abstract wave equation , where is the Laplace operator with a point interaction of strength , we define and study , the associated wave…
math.FA2000
A Krein-Like Formula for Singular Perturbations of Self-Adjoint Operators and Applications
Andrea Posilicano
Given a self-adjoint operator $A:D(A)\subseteq\calH\to\calH$ and a continuous linear operator $τ:D(A)\to\X$ with Range$ τ'\cap\calH' ={0}$, $\X$ a Banach space, we explicitly const…