Existence and Uniqueness Results for Perturbed Neumann Boundary Value Problems
1 Business College of Shanxi Universit, Taiyuan, Shanxi 030031, China
2 School of Mathematical Sciences, Shanxi University, Taiyuan, Shanxi 030006, China
Boundary Value Problems 2010, 2010:494210 doi:10.1155/2010/494210Published: 29 July 2010
Using a fixed point theorem of general -concave operators, we present in this paper criteria which guarantee the existence and uniqueness of positive solutions for two classes of nonlinear perturbed Neumann boundary value problems for second-order differential equations. The theorems for Neumann boundary value problems obtained are very general.