一类非线性二阶常微分方程周期问题正解的存在性
Existence of positive solutions for a class of nonlinear second-order periodic problems

本文研究了非线性二阶常微分方程周期边值问题正解的存在性.主要结果的证明基于锥拉伸与 压缩不动点定理.
In this paper, we consider the existence of positive solutions for the nonlinear second-order periodic problems. The proofs of the main results are based on the fixed-point theorem of cone expansion-compression