共查询到19条相似文献,搜索用时 93 毫秒
1.
高阶泛函微分方程的振动性质* 总被引:11,自引:0,他引:11
本文借助于Lebesgue测度等工具研究了一类高阶非线性泛函微分方程的振动性质.文中指出.在一定条件下,方程的非振动解仅有两类,而且给出了每一类非振动解存在的必要条件,同时也建立了方程振动的若干充分判据. 相似文献
2.
二阶泛函微分方程的振动性质 总被引:5,自引:0,他引:5
在本文中,我们研究了一类较广泛的二阶非线性泛函微分方程的振动性质。文中指出,在一定条件下,方程的非振动解仅有两类,而且给出了每一类非振动解存在的必要条件,同时也建立了方程振动的若干充分判据。 相似文献
3.
阮炯 《数学年刊A辑(中文版)》1988,(2)
本文讨论二阶具有非正系数的中立型与滞后型泛函微分方程,给出了这些方程的非振动解的类型以及判别条件。 对于cO情形(中立型),本文给出了四种S~*类的非振动解:对于|c|相似文献
4.
本文讨论食物受限人口模型中的一个非线性延迟微分方程数值解的振动性.通过应用两种θ-方法,即线性θ-方法和单腿θ-方法,构造指数θ-方法,得到数值解振动的条件,进一步考虑非振动解的渐近行为,最后给出两个数值算例. 相似文献
5.
我们讨论了一类具有连续分布偏差变元的偏差分方程解的振动性,给出了方程满足两类边界条件具有振动解的充分条件. 相似文献
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给出时标上一类带强迫项高阶中立型动力方程一切解振动和非振动解存在的若干充分条件.所得结果推广了一些已有的结论. 相似文献
8.
带强迫项高阶中立型微分方程的振动性和非振动性 总被引:1,自引:0,他引:1
我们给出一类强迫高阶非线性中立型时滞微分方程一切解振动的充分条件.而且,也研究了一类强迫一阶中立型方程非振动解的渐近性. 相似文献
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10.
二阶非线性中立型方程非振动解的渐近性和存在性 总被引:3,自引:0,他引:3
本文研究二阶非线性中立型方程(2)非振动解的渐近性和存在性.当 0(?)sum from i=1 to mc_i(t)<1时,(2)最多有 S(0,0,0),S(b,a,0),S(∞,∞,0)和 S(∞,∞,d)四种类型的非振动解.我们给出了各种类型非振动解存在的充分条件或充分必要条件. 相似文献
11.
Bi Ping Qiaoluan Li Zhenguo Zhang Wenlei Dong 《Journal of Applied Mathematics and Computing》2001,8(2):311-324
In this paper, we are mainly concerned with the classification of nonoscillatory solutions for the higher order difference
equation and some existence results for some kinds of nonoscillatory solutions. 相似文献
12.
In this work, we consider the existence of nonoscillatory solutions of variable coefficient higher order linear neutral differential equations with distributed deviating arguments. We use the Banach contraction principle to obtain new sufficient conditions, which are weaker than those known, for the existence of nonoscillatory solutions. 相似文献
13.
T. Candan 《Applied Mathematics Letters》2012,25(3):412-416
In this work, we consider the existence of nonoscillatory solutions of variable coefficient higher order nonlinear neutral differential equations. Our results include as special cases some well-known results for linear and nonlinear equations of first, second and higher order. We use the Banach contraction principle to obtain new sufficient conditions for the existence of nonoscillatory solutions. 相似文献
14.
Oscillatory, nonoscillatory, and periodic solutions of re-tarded functional differential equations are investigated. The study concerns a system of two first order linear equations with piecewise constant argument. 相似文献
15.
研究了下列二阶中立型差分方程Δ2[x(n)-px(n-τ)]+q(n)x(g(n))=0,n n0正解渐近趋向于零的充分条件. 相似文献
16.
Lu Wudu 《数学学报(英文版)》1993,9(2):166-174
The main purpose of this paper is to study the existence of nonoscillatory solutions of the second order non-linear differential
equation (1). The author first generalizes a Wintner's lemma [1,8] to nonlinear equations (i.e. the following Theorem 1 and
4), and then obtains the necessary and sufficient conditions for the existence of nonoscillatory solutions of (1). These theorems
generalize the corresponding results of [1] to include nonlinear equations. Using the above results, the author further obtains
a series of criterion theorems for the existence of nonoscillatory solutions and comparison theorems for the oscillation and
nonoscillation of nonlinear equations. 相似文献
17.
In the paper second-order linear neutral differential equations with a distributed delay are considered. The asymptotic properties of their nonoscillatory solutions are investigated. 相似文献
18.
1 IntroductionConsider the second order quasilinear difference equationA(g(Ay.--l)) + f(n,y.) = 0, for n E N(no), (l'l)where A is defined by Ay. = Vn+1--yn, n E N(no) = {no, no + 1,'' }, nO E N = {l, 2,'. }.The following hold throughout the paPer:(H0) (i) g: R-R is a continuous increasing fUnction with propertiessgng(y) = sgny) g(R) = R;(il) f: N(no) x R--+ R is continuous as a function of y E R;(iii) yf(n,y) > 0 for n E N and y / 0.By a solution of the equation (1.l) we mean a non… 相似文献