scientific article; zbMATH DE number 850439
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Publication:4866465
zbMath0844.47008MaRDI QIDQ4866465
Publication date: 5 May 1996
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
estimates of the number of eigenvaluesperturbation of the operator of multiplication by an independent variableperturbations of certain selfadjoint and unitary operators in a Hilbert space
Perturbation theory of linear operators (47A55) Eigenvalue problems for linear operators (47A75) Linear symmetric and selfadjoint operators (unbounded) (47B25)
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