On the hyperstablity of a quadratic functional equation in commutative groups

Abdulbakee Kasem, Muaadh Almahalebi, Youssfi Elkettani

Résumé


In this paper, we prove the generalized Hyers-Ulam-Rassias stability for the following Cauchy-Jensen type functional
equation f x+y 2+ f x

Mots-clés


stability , hyperstability, ultrametric space, Jensen functional equation.

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