We investigate the following typical form of a certain class of quadratic functional equations: . Furthermore, we provide a systematic program to prove the generalized Hyers-Ulam stability for the class of functional equations via the stability for the typical form.
"Hyers-Ulam Stability for a Class of Quadratic Functional Equations via a Typical Form." Abstr. Appl. Anal. 2013 1 - 8, 2013. https://doi.org/10.1155/2013/283173