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一阶中立型时滞微分方程的振动准则
引用本文:杨继昌,沈柳平.一阶中立型时滞微分方程的振动准则[J].黄冈师范学院学报,2008,28(6):5-8.
作者姓名:杨继昌  沈柳平
作者单位:柳州师范高等专科学校数学与计算机科学系,广西,柳州,545004
摘    要:研究一阶中立型时滞微分方程(x(t)+px(t—γ))’+q(t)x(t—σ)=0,其中t≥t0,P〉0,γ、σ∈(0,+∞),得到了q(t)为正的连续周期函数、q(t)为正且等于连续周期函数与下确界极限为零的正值函数之和、q(t)为正值连续函数这三种情形下此方程的所有解振动的充分判据。

关 键 词:中立型  时滞微分方程  振动

The criterion of oscillation for the differential equations of the first order neutral delay
YANG Ji-chang,SHEN Li-uping.The criterion of oscillation for the differential equations of the first order neutral delay[J].Journal of Huanggang Normal University,2008,28(6):5-8.
Authors:YANG Ji-chang  SHEN Li-uping
Institution:YANG Ji-chang,SHEN Liu-ping(Department of Mathematics , Computer Science,Liuzhou Teachers College,Liuzhou 545004,Guangxi,China)
Abstract:We study the differential equation of the first order neutral delay ( x (t) + px ( t - γ )' + q ( t ) x (t -σ) =0 ,where t≥t0 ,p 〉0 ,γ,σ ∈(0,+∞). The sufficient conditions for the oscillation of all solutions of the equation are obtained upon three conditions that q(t) is a positive and continuous periodic function, or that q(t) is positive and equal to the sum of a continuous periodic function and a positive function with the limit of sub-boundary zero,or that q(t) is a positive continuous function.
Keywords:neutral  delay differential equation  oscillation  
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