四阶四点Sturm-Liouville边值问题正解的存在性

Existence of positive solution for fourth-order four-point Sturm-Liouville boundary value problem

利用范数形式的锥拉伸与压缩不动点定理获得了四阶四点Sturm-Liouville边值问题存在正解的若干充分条件.

Some sufficient conditions for the existence of positive solution to fourth-order four-point Sturm -Liouville boundary value problem are obtained by using the fixed-point theorem concerning cone expansion and compression of norm type.