摘要
本文研究一类形如 (r(t)x(n- 1) (t) )′+f(t,x(t) ,x(Φ(t,x(t) ) ) =0 的具状态时滞的高阶非线性微分方程 .按照最终正解的量级给出了它们的分类及存在的充分条件 .
A class of higher-order nonlinear differential equations with state dependent delays of the from(r(t)x (n-1) (t))′+f(t, x(t), x(Φ(t, x(t))))=0in the case when ∫ ∞ 0ds/r(s)=∞ is studied. Various classifications of their eventually positive solutions are given in terms of their asymptotic magnitudes, and necessary as well as sufficient conditions for the existence of these solutions are also provided.
出处
《数学研究》
CSCD
2004年第3期238-244,共7页
Journal of Mathematical Study
基金
theNationalNaturalScienceFoundationofPeople'sRepublicofChinaun dergrant 10 36 10 0 6andtheNaturalSciencesFoundationofYunnanProvinceundergrant 2 0 0 3A0 0 0 1M
关键词
时滞
非线性微分方程
正解
渐近行为
不动点
Differential equation with state dependent delay
eventually positive solution
asymptotic behavior
fixed point theorem