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

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.