Fixed Point Theory and Applications
Volume 2008 (2008), Article ID 732086, 11 pages
doi:10.1155/2008/732086
A fixed point approach to the stability of quadratic functional equation with involution
Soon-Mo Jung1
and Zoon-Hee Lee2
1Mathematics Section, College of Science and Technology, Hong-Ik University, Chochiwon 339-701, South Korea
2Department of Mathematics, Chungnam National University, Deajeon 305-764, South Korea
Abstract
Cădariu and Radu applied the fixed point method to the investigation of Cauchy and Jensen functional equations. In this paper, we will adopt the idea of Cădariu and Radu to prove the Hyers-Ulam-Rassias stability of the quadratic functional equation with involution.