Abstract
In this paper, some new concepts in stability of fractional differential equations are offered from different perspectives. Hyers-Ulam-Rassias stability as well as Hyers-Ulam stability of a certain fractional differential equation are presented. The techniques rely on a fixed point theorem in a generalized complete metric space. Some applications of our results are also provided. (C) 2011 Elsevier B.V. All rights reserved.