×

zbMATH — the first resource for mathematics

Remarks on the stability of Drygas’ equation and the Pexider-quadratic equation. (English) Zbl 1056.39038
The author proves the Hyers-Ulam stability of the Pexider-quadratic equation and Drygas’ equation on a class of groups, with sharper bounds. An example is also given to illustrate that the quadratic functional equation is not stable in general on non abelian groups.

MSC:
39B82 Stability, separation, extension, and related topics for functional equations
39B52 Functional equations for functions with more general domains and/or ranges
PDF BibTeX XML Cite
Full Text: DOI