Multiplicity of Positive Periodic Solutions of Singular Semipositone Third-Order Boundary Value Problems
© Yigang Sun. 2008
Received: 2 July 2007
Accepted: 13 December 2007
Published: 2 January 2008
We establish the existence of multiple positive solutions for a singular nonlinear third-order periodic boundary value problem. We are mainly interested in the semipositone case. The proof relies on a nonlinear alternative principle of Leray-Schauder, together with a truncation technique.
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