Open AccessA Fixed Point Approach to the Stability of a Quadratic Functional Equation in C∗-Algebras
Author(s) -
M. B. Moghimi,
Abbas Najati,
Choonkil Park
Publication year - 2009
Publication title -
advances in difference equations
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.67
H-Index - 51
eISSN - 1687-1847
pISSN - 1687-1839
DOI - 10.1155/2009/256165
Subject(s) - functional equation , mathematics , fixed point , fixed point iteration , quadratic equation , partial differential equation , ordinary differential equation , stability (learning theory) , fixed point theorem , functional analysis , differential equation , mathematical analysis , computer science , geometry , machine learning , gene , biochemistry , chemistry
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