Finite rank perturbations in Pontryagin Spaces and a Sturm–Liouville problem with λ-rational boundary conditions

For selfadjoint operators A 1 and A 2 in a Pontryagin space Πκ such that the resolvent difference of A 1 and A 2 is n-dimensional it is shown that the dimensions of the spectral subspaces corresponding to open intervals in gaps of the essential spectrum differ at most by n+2κ. This is a natural exte...

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Detalles Bibliográficos
Autores principales: Behrndt, J., Philipp, F.
Formato: SER
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_02550156_v263_n_p163_Behrndt
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

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