On two characteristic properties of Euclidean norms

zbMath0741.15020MaRDI QIDQ1179126

Hansklaus Rummler

Publication date: 26 June 1992

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

Full work available at URL: https://eudml.org/doc/141512

zbMATH Keywords

Euclidean normorthogonal complementnormed vector spacegroup of linear isometries

Mathematics Subject Classification ID

Norms of matrices, numerical range, applications of functional analysis to matrix theory (15A60) Quadratic and bilinear forms, inner products (15A63)

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On some types of rigid sets in Banach spaces

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