Document Type : Research Paper
Islamic Azad University
Department of Mathematics, National Technical University of Athens, Zofrafou Campus, 15780 Athens, Greece
Ayatollah Borujerdi University
In this article, we introduce a class of the generalized mixed additive, quadratic and quartic functional equations and obtain their common solutions. We also investigate the stability of such modified functional equations in the non-Archimedean normed spaces by a fixed point method.