节点文献
具有正负系数中立型微分方程的正解
On the Positive Solutions of a Kind of Neutral Equations with Positive and Negative Coeffcients
【摘要】 本文研究具有正负系数的中立型微分方程[X(t)-R(t)x(t-r)]’+P(t)x(t-r)-Q(t)x(t-δ)=0.在允许R(t)+Q(s)ds1不成立的条件下,获得方程(*)存在正解的两个充分条件.
【Abstract】 Consider the neutral differential equations with positive and negative coefficientsTwo sufficient conditions for the existence of positive solutions of Eq.(*) are obtained when R(t) + Q(s)ds 1 is not satisfied.
【关键词】 中立型方程;
正解;
正负系数;
【Key words】 Neutral differential equation; Positive solution; Positive and negative coefficients;
【Key words】 Neutral differential equation; Positive solution; Positive and negative coefficients;
【基金】 高校博士点专项基金
- 【文献出处】 数学学报 ,ACTA MATHEMATICA SINICA , 编辑部邮箱 ,1999年05期
- 【分类号】O175.1
- 【被引频次】24
- 【下载频次】75