Hyers-Ulam-Rassias stability of a composite functional equation in various normed spaces

Document Type: Research Paper

Author

Yasouj University

Abstract

In this paper, we prove the generalized Hyers-Ulam(or Hyers-Ulam-Rassias ) stability of the following composite functional equation

f(f(x)-f(y))=f(x+y)+f(x-y)-f(x)-f(y)

in various normed spaces.

Keywords

Main Subjects