Isomorphisms and derivations in \(C^*\)-algebras
Using the usual direct method, the Hyers-Ulam-Rassias stability of homomorphisms and derivations in \(C^*\)-modules are investigated; see also [\textit{W. Fechner}, Aequationes Math. 71, No. 1--2, 149--161 (2006; Zbl 1098.39019)].
Jordan-von Neumann type Cauchy-Jensen functional equation
scientific article; zbMATH DE number 6000889