Boundary triples and Weyl functions for singular perturbations of self-adjoint operators

الأصل · EN

Given the symmetric operator Aₙ obtained by restricting the self-adjoint operator A to N, a linear dense set, closed with respect to the graph norm, we determine a convenient boundary triple for the adjoint Aₙ* and the corresponding Weyl function. These objects provide us with the self-adjoint extensions of Aₙ and their resolvents.