A Fixed Points Approach to stability of the Pexider Equation

Using the fixed point theorem we establish the Hyers-Ulam-Rassias stability of the generalized Pexider functional equation $\frac{1}{\mid K\mid}\sum_{k\in K}f(x+k\cdot y)=g(x)+h(y),\;\;x,y\in E$ from a normed space $E$ into a complete $β$-normed space $F$, where $K$ is a finite abelian subgroup of the automorphism group of the group $(E,+)$.

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