Approximation by semi-Fredholm operators with fixed nullity

DOI10.1216/rmjm/1181073157zbMath0727.47006OpenAlexW2028869221MaRDI QIDQ803502

Richard Bouldin

Publication date: 1990

Published in: Rocky Mountain Journal of Mathematics (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1216/rmjm/1181073157

zbMATH Keywords

distance from a bounded linear operator on a Hilbert space to semi- Fredholm operators with fixed nullitythe closure of the union of the right semi-Fredholm operators and the left semi-Fredholm operators equals the algebra of all continuous endomorphisms

Mathematics Subject Classification ID

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

Related Items

On the topological boundary of semi-Fredholm operators, Distance to Invertible Linear Operators without Separability, Approximating Fredholm operators on a nonseparable Hilbert space

Cites Work

• Approximation by invertible and noninvertible operators
• Approximation by Operators with Fixed Nullity
• The Closure of the Regular Operators in a Ring of Operators
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