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20082020
most citedAn eigenvalue estimate and its application to non-selfadjoint Jacobi and Schrödinger operators

35 citations · 72 across the 13 of their papers we have counts for

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Showing 2012Show all

2 papers · 1 filter

math.SP2012

Eigenvalues of non-selfadjoint operators: A comparison of two approaches

Michael Demuth, Marcel Hansmann, Guy Katriel

The central problem we consider is the distribution of eigenvalues of closed linear operators which are not selfadjoint, with a focus on those operators which are obtained as pertu…

math.SP2012★ 25 cited

Variation of discrete spectra for non-selfadjoint perturbations of selfadjoint operators

Marcel Hansmann

Let B=A+K where A is a bounded selfadjoint operator and K is an element of the von Neumann-Schatten ideal S_p with p>1. Let {λ_n} denote an enumeration of the discrete spectrum of…