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This paper is a survey on the Hyers–Ulam–Rassias stability of the following Cauchy–Jensen functional equation in C *-algebras: $$2f\biggl(\frac{x+y}{2}+z\biggr)=f(x)+f(y)+2f(z).$$ The concept of Hyers–Ulam–Rassias stability originated from the Th.M. Rassias’ stability theorem (Rassias in Proc. Am. Math. Soc. 72:297–300, [1978]).
Acta Applicandae Mathematicae – Springer Journals
Published: Jan 23, 2008
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