Positive Solutions of Sturm-Liouville Boundary Value Problems in Presence of Upper and Lower Solutions

Li Zhang, Xiankai Huang, Weigao Ge
2011 International Journal of Differential Equations  
We consider a kind of Sturm-Liouville boundary value problems. Using variational techniques combined with the methods of upper-lower solutions, the existence of at least one positive solution is established. Moreover, the upper solution and the lower solution are presented.
doi:10.1155/2011/383294 fatcat:ong3gnutk5do3ng7bha6u2m4ya