Academic Editor: Ivan T. Kiguradze
Copyright © 2009 Li Sun et al. 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.
By appropriate bounding function pair and modified functions, using the theory of differential inequalities, this paper presents the existence and location criteria of solutions for the system of general
nth-order differential equations with nonlinear boundary conditions. We give an example showing that the results are sharp. Our results extend many existing results.