摘要
讨论了具有正负系数的一阶中立型微分方程 [x(t) - p(t)x (t -τ) ]′ +q(t) f(x(t -σ) ) -r(t) f(x(t-δ) ) =0解的渐近性 。
The first order neutral differential equation is studied with positive and negative coefficients.The formula is non vibrating gradation. Some new sufficient conditions are obtained that guarantee every solution of the equation to oscillate.
出处
《柳州师专学报》
2002年第4期96-97,共2页
Journal of Liuzhou Teachers College
关键词
正负系数
一阶中立型微分方程
解
渐近性
振动性
positive and negative coefficients
differential equation
gradation
vibration
