A Fixed Point Approach to the Stability of a Quadratic Functional Equation in C∗-Algebras

We use a fixed point method to investigate the stability problem of the quadratic functional equation f(x+y)+f(x−y)=2f(xx∗+yy∗) in C∗-algebras.

Bibliographic Details
Main Authors:	Mohammad B. Moghimi, Abbas Najati, Choonkil Park
Format:	Article
Language:	English
Published:	SpringerOpen 2009-01-01
Series:	Advances in Difference Equations
Online Access:	http://dx.doi.org/10.1155/2009/256165

http://dx.doi.org/10.1155/2009/256165

A Fixed Point Approach to the Stability of a Quadratic Functional Equation in C&#x2217;-Algebras