Operators and Matrices · Volume 11, Issue 1

Pseudospectrum of an element of a Banach algebra

11-18 Pages 263-287 DOI 10.7153/oam-11-18

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Authors

Arundhathi Krishnan S. H. Kulkarni

Keywords

Banach algebra Hermitian idempotent numerical range pseudospectrum semisimple spectrum

Subject classes

47A10 46H05 47A12