Displaying similar documents to “The solution of a system of quadratic functional equations”

Espacios de producto interno (II).

Palaniappan Kannappan (1995)

Mathware and Soft Computing

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Among normal linear spaces, the inner product spaces (i.p.s.) are particularly interesting. Many characterizations of i.p.s. among linear spaces are known using various functional equations. Three functional equations characterizations of i.p.s. are based on the Frchet condition, the Jordan and von Neumann identity and the Ptolemaic inequality respectively. The object of this paper is to solve generalizations of these functional equations.