Stability of Schechter essential spectrum of \(2 \times 2\) block operator matrix by means of measure of non strict singularity and application

DOI10.1016/j.indag.2017.09.010OpenAlexW2764056070MaRDI QIDQ1678017

Nedra Moalla, Ines Walha

Publication date: 14 November 2017

Published in: Indagationes Mathematicae. New Series (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1016/j.indag.2017.09.010

zbMATH Keywords

weak compactnessmatrix operatorSchechter essential spectrumrelatively weakly compactmeasure of non compactnessmeasure of non strict singularity

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) Operator matrices (47A08)

Related Items (2)

Spectral description of Fredholm operators via polynomially Riesz operators perturbation ⋮ Generalized weak demicompactness involving measure of non-strict-singularity

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