Department of Mathematics, National Kaohsiung Normal University, Kaohsiung 802, Taiwan
Academic Editor: Juan J. Nieto
Copyright © 2010 Wei-Shih Du. 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.
We establish some new coupled fixed point theorems for various types of nonlinear contractive maps in the setting of quasiordered cone metric spaces which not only obtain several coupled fixed point theorems announced by many authors but also generalize them under weaker assumptions.