摘要
利用Krasoselski不动点定理,得到了一类二阶非线性NFDE的非振动解存在的充要条件.参3.
The sufficient and necessary conditions for non-oscillatory solutions of a second order nonlinear NFDE are obtained by using Krasnoselskii fixed point theory in this paper.3refs.
出处
《湘潭矿业学院学报》
1998年第3期89-94,共6页
Journal of Xiangtan Mining Institute