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  • Research Article
  • Open Access

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

Boundary Value Problems20072007:076493

  • Received: 23 March 2006
  • Accepted: 5 December 2006
  • Published:


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.


  • Differential Equation
  • Partial Differential Equation
  • Ordinary Differential Equation
  • Functional Equation
  • Existence Theorem


Authors’ Affiliations

Department of Mathematics, Suzhou College, Suzhou, 234000, China
School of Mathematics Science, Xuzhou Normal University, Xuzhou, 221116, China


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© 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.