A note on the punctured neighbourhood theorem

DOI10.1017/S0017089500032201zbMath0894.47009OpenAlexW2094271258MaRDI QIDQ4370692

Woo Young Lee, Robin E. Harte

Publication date: 6 January 1998

Published in: Glasgow Mathematical Journal (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1017/s0017089500032201

zbMATH Keywords

Fredholm operatorsemi-Fredholm operatorspunctured neighbourhood theoremboundary of the spectrumoperators with closed range and finite-dimensional null space

Mathematics Subject Classification ID

(Semi-) Fredholm operators; index theories (47A53)

Cites Work

• Unnamed Item
• Perturbation theory for nullity, deficiency and other quantities of linear operators
• Boundaries of the Spectra in L(X)
• A Generalization of the Punctured Neighborhood Theorem
• On a Generalized Punctured Neighborhood Theorem in L (X)

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