Numerical ranges of elements of involutive Banach algebras and commutativity

DOI10.1007/S000130050126zbMath0909.47002OpenAlexW2079981148MaRDI QIDQ1383617

Mitsuru Uchiyama

Publication date: 8 April 1999

Published in: Archiv der Mathematik (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1007/s000130050126

zbMATH Keywords

\(C^*\)-algebranumerical rangenumerical radiusMöbius transformmapping theoremsunital involutive Banach algebra

Mathematics Subject Classification ID

Numerical range, numerical radius (47A12) Spectral sets of linear operators (47A25) Topological (rings and) algebras with an involution (46K99)

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