Department of Mathematics, Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Republic of Korea
Academic Editor: W. A. Kirk
Copyright © 2010 Choonkil Park. This is an open access article distributed under the
Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Using fixed point method, we prove the generalized Hyers-Ulam stability of the following
additive-quadratic-cubic-quartic functional equation in non-Archimedean Banach spaces.