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ON THE STABILITY OF VECTOR VALUED PEXIDEREZED FUNCTIONAL EQUATIONS

Author(s) : F. Lehlou, M. Moussa, A. Roukbi and S. Kabbaj
Pages : [57] - [67]
Received : July 8, 2017; Revised August 13, 2017
Communicated by : Professor Jong-Kwang Yoo

Abstract

In this paper, we first study the superstability of the Wilson’s equation

 

                                                     (1)

 

for normed algebra, with multiplicative norm, valued functions on semigroups and secondly we investigate the stability problem of Pexiderezed cosine functional equations for vector valued functions.

Keywords

 stability, d’Alembert’s functional equation, algebra.