On two conditional forms of the equation \(\| f(x+y)\|=\| f(x)+f(y)\|\)

DOI10.1007/BF01855876zbMath0776.39003OpenAlexW4231323555MaRDI QIDQ1801334

Fulvia Skof

Publication date: 22 November 1993

Published in: Aequationes Mathematicae (Search for Journal in Brave)

Full work available at URL: https://eudml.org/doc/137519

zbMATH Keywords

conditional formsreal linear spacesstrictly normed space

Mathematics Subject Classification ID

Functional equations for functions with more general domains and/or ranges (39B52)

Related Items (2)

Semi-Inner Products and Parapreseminorms on Groups and a Generalization of a Theorem of Maksa and Volkmann on Additive Functions ⋮ The thirty-ninth International symposium on functional equations, August 12--18, 2001, Sandbjerg, Denmark

Cites Work

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• On some functional equations with a restricted domain
• On Some New Generalizations of the Functional Equation of Cauchy
• Isometries in Normed Spaces
• On Mikusiński's functional equation

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