Distance formulas in the generalized spectrum and the semi-Fredholm spectrum.

DOI10.1006/jfan.2002.3969zbMath1010.47003OpenAlexW1992298066MaRDI QIDQ1865300

Mostafa Mbekhta

Publication date: 26 March 2003

Published in: Journal of Functional Analysis (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1006/jfan.2002.3969

zbMATH Keywords

generalized spectrumconormessential conormsemi-Fredholm spectrum

Mathematics Subject Classification ID

Spectrum, resolvent (47A10) (Semi-) Fredholm operators; index theories (47A53)

Cites Work

• Perturbation theory for nullity, deficiency and other quantities of linear operators
• Les opérateurs quasi Fredholm: Une généralisation des opérateurs semi Fredholm
• The reduced minimum modulus
• The surjectivity radius, packing numbers and boundedness below of linear operators
• Geometric characteristic of semi-Fredholm operators and their asymptotic behaviour
• On models for linear operators
• On the Asymptotic Behaviour of Some Quantities Related to Semifredholm Operators
• Generalisation de la decomposition de kato aux opérateurs paranormaux et spectraux
• Conorme et Inverse Généralisé Dans Les C*-Algèbres
• Compressions of resolvents and maximal radius of regularity
• On generalized inverses in C*-algebras
• Generalized inverses in C*-algebras II
• Sur la conorme essentielle
• The Asymptotic Behavior of the Reduced Minimum Modulus of a Fredholm Operator
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