Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4592494 | Journal of Functional Analysis | 2007 | 34 Pages |
Abstract
Let be a self-adjoint extension in of a fixed symmetric operator A in . An analytic characterization of the eigenvalues of is given in terms of the Q-function and the parameter function in the Krein–Naimark formula. Here K and are Krein spaces and it is assumed that locally has the same spectral properties as a self-adjoint operator in a Pontryagin space. The general results are applied to a class of boundary value problems with λ-dependent boundary conditions.
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