Multiplicity of Positive Periodic Solutions of Singular Semipositone Third-Order Boundary Value Problems

Yigang Sun
2008 Boundary Value Problems  
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.
doi:10.1155/2008/574842 fatcat:jzizrkmd7vebhfm5xz3sndymte