The joint essential numerical range, compact perturbations, and the Olsen problem

DOI10.4064/sm197-3-5zbMath1193.47007OpenAlexW2031249960MaRDI QIDQ3553312

Vladimír Müller

Publication date: 22 April 2010

Published in: Studia Mathematica (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.4064/sm197-3-5

zbMATH Keywords

joint numerical rangecompact perturbationjoint essential numerical rangeOlsen's problem

Mathematics Subject Classification ID

Several-variable operator theory (spectral, Fredholm, etc.) (47A13) Numerical range, numerical radius (47A12)

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