Department of Mathematics, Faculty of Science, Arak University, Arak 38156-8-8349, Iran
Copyright © 2011 Sirous Moradi. 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.
In the paper by Olaleru and Akewe (2007), the authors tried to generalize
Gregus fixed point theorem. In this paper we give a counterexample on their main