Hyers-Ulam-Rassias stability of derivations in proper Jordan \(CQ^*\)-algebras (Q653908)

The authors prove the stability of derivations in proper Jordan \(CQ^*\)-algebras associated to the Pexiderized Jensen type functional equation \(kf(\frac{x + y}{k}) = f_0(x) + f_1(y)\) by using the standard direct method. The paper is, in essence, similar to the papers of \textit{C. Park} and \textit{Th. M. Rassias} [J. Math. Anal. Appl. 337, No.~2, 1404--1414 (2008; Zbl 1147.39012)] and \textit{A. Najati}, \textit{G. Zamani Eskandani} and \textit{C. Park} [Bull. Korean Math. Soc. 46, No.~1, 45--60 (2009; Zbl 1175.39023)].