A Common Fixed Point Theorem in Cone Metric Spaces over Banach Algebras

Abstract

In this paper, a common fixed point theorem for four mappings in cone metric spaces over Banach algebras is
proved without assuming the normality of underlying cone. The results of this paper unify, generalize and extend some
known results in cone metric spaces over Banach algebras. An example is presented which shows the significance of
the result proved herein.