On Different Definitions of Positive Definiteness

DOI10.1002/MANA.19911520104zbMath0738.47030OpenAlexW2079602481MaRDI QIDQ3978532

Jürgen Friedrich, Lutz Klotz

Publication date: 25 June 1992

Published in: Mathematische Nachrichten (Search for Journal in Brave)

Full work available at URL: https://doi.org/10.1002/mana.19911520104

zbMATH Keywords

Hilbert spacerepresentationweakly positive definite functioncommutativity of group

Mathematics Subject Classification ID

Groups and semigroups of linear operators (47D03) Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones) (47A56) Representation theory of groups (20C99)

Related Items (2)

On (conditional) positive semidefiniteness in a matrix-valued context ⋮ On Positivity Preserving, Translation Invariant Operators in $$ \mathit L^p (\mathbb R^n)^m $$

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