Open Access

Positive Solutions of Boundary Value Problems for System of Nonlinear Fourth-Order Differential Equations

Boundary Value Problems20072007:076493

DOI: 10.1155/2007/76493

Received: 23 March 2006

Accepted: 5 December 2006

Published: 30 January 2007

Abstract

Some existence theorems of the positive solutions and the multiple positive solutions for singular and nonsingular systems of nonlinear fourth-order boundary value problems are proved by using topological degree theory and cone theory.

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Authors’ Affiliations

(1)
Department of Mathematics, Suzhou College
(2)
School of Mathematics Science, Xuzhou Normal University

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Copyright

© S. Xie and J. Zhu. 2007

This article is published under license to BioMed Central Ltd. 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.