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On the numerical ranges of a family of commuting operators - MaRDI portal

On the numerical ranges of a family of commuting operators

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Publication:1277588

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DOI10.1007/BF02361305zbMath0921.47006MaRDI QIDQ1277588

Alexander Gomilko, G. V. Radzievskij

Publication date: 30 September 1999

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

zbMATH Keywords

semi-inner product Hahn-Banach theorem numerical range renormalization convex hull commuting operators

Mathematics Subject Classification ID

Generalizations of inner products (semi-inner products, partial inner products, etc.) (46C50) Several-variable operator theory (spectral, Fredholm, etc.) (47A13) Numerical range, numerical radius (47A12)

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