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Stability of a functional equation of Drygas - MaRDI portal

Stability of a functional equation of Drygas (Q1861181)

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scientific article; zbMATH DE number 1882110
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Stability of a functional equation of Drygas
scientific article; zbMATH DE number 1882110

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    Stability of a functional equation of Drygas (English)
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    13 March 2003
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    This paper is devoted to establishing the Hyers-Ulam stability of the functional equation \(f(x+ y)+ f(x-y)= 2f(x)+ g(2y)\).
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    quasi-inner-product space
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    Hyers-Ulam stability
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