scientific article; zbMATH DE number 832135

zbMATH Open0840.39012MaRDI QIDQ4861208

Palaniappan Kannappan

Publication date: 8 February 1996

Full work available at URL: https://eudml.org/doc/39026

Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.

zbMATH Keywords

characterizationsfunctional equationsinner product spacesPtolemaic inequalityJordan identityFréchet conditionvon Neumann identity

Mathematics Subject Classification ID

Functional equations for real functions (39B22) Characterizations of Hilbert spaces (46C15) Functional equations for functions with more general domains and/or ranges (39B52) Quadratic and bilinear forms, inner products (15A63)

Related Items (1)

An operator equality involving a continuous field of operators and its norm inequalities

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