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Open Access Research Article

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

Shengli Xie1* and Jiang Zhu2

Author Affiliations

1 Department of Mathematics, Suzhou College, Suzhou 234000, China

2 School of Mathematics Science, Xuzhou Normal University, Xuzhou 221116, China

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Boundary Value Problems 2007, 2007:076493  doi:10.1155/2007/76493

The electronic version of this article is the complete one and can be found online at: http://www.boundaryvalueproblems.com/content/2007/1/076493

Received:23 March 2006
Revisions received:8 October 2006
Accepted:5 December 2006
Published:30 January 2007

© 2007 Xie and Zhu

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.

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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