B-essential and B-Weyl spectra of sum of two commuting bounded operators by means operator pencils

DOI10.1007/s00605-023-01874-7MaRDI QIDQ6049528

Kais Dhifaoui, Faiçal Abdmouleh

Publication date: 17 October 2023

Published in: Monatshefte für Mathematik (Search for Journal in Brave)

zbMATH Keywords

finite rank operatorsoperators pencilsB-Fredholm operatorsB-Weyl operatorsB-essential spectrum

Mathematics Subject Classification ID

Operator theory (47-XX)

Cites Work

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• On a class of quasi-Fredholm operators
• \(B\)-essential and \(B\)-Weyl spectra of sum of two commuting bounded operators
• Spectral theory involving the concept of quasi-compact perturbations
• B-essential spectra of \(2 \times 2\) block operator matrix pencils
• On semi B-Fredholm operators
• Index of B-Fredholm operators and generalization of a Weyl theorem