×

On the stability of the generalized cosine functional equations. (English) Zbl 1139.39316

Summary: The aim of this paper is to study the stability problem of the generalized cosine functional equations for complex and vector valued functions.

MSC:

39B82 Stability, separation, extension, and related topics for functional equations
39B52 Functional equations for functions with more general domains and/or ranges
PDFBibTeX XMLCite