Perturbating Upper Semi-fredholm With Strictly Singular Operators

Given an upper semi-Fredholm operator $L$, following the work of P. Cassaza and N. Kalton [1] and others, we introduce and study a set of upper semi-Fredholm operators having the same index as $L$ and which is invariant under strictly singular perturbations.   2000 Mathematics Subject Classification...

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Bibliographic Details
Published inSarajevo journal of mathematics Vol. 2; no. 1; pp. 55 - 62
Main Author Galaz-Fontes, Fernando
Format Journal Article
LanguageEnglish
Published 12.06.2024
Online AccessGet full text
ISSN1840-0655
2233-1964
DOI10.5644/SJM.02.1.06

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Summary:Given an upper semi-Fredholm operator $L$, following the work of P. Cassaza and N. Kalton [1] and others, we introduce and study a set of upper semi-Fredholm operators having the same index as $L$ and which is invariant under strictly singular perturbations.   2000 Mathematics Subject Classification. 47A53, 47A55
ISSN:1840-0655
2233-1964
DOI:10.5644/SJM.02.1.06