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.
Main Authors: | , , |
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Format: | Article |
Language: | English |
Published: |
SpringerOpen
2009-01-01
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Series: | Advances in Difference Equations |
Online Access: | http://dx.doi.org/10.1155/2009/256165 |
Summary: | 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. |
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ISSN: | 1687-1839 1687-1847 |