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1.
李晓培 《大学数学》2006,22(3):67-71
通过构造一个新的结构算子,应用Schauder不动点定理,研究了变系数高维多项式型迭代方程的光滑解.  相似文献   

2.
一类非局部Cahn-Hilliard方程弱解的存在唯一性   总被引:1,自引:0,他引:1  
研究一类对流非局部Cahn-Hilliard方程的Neumann问题.通过一致Schauder估计和Leray-Schauder不动点定理,得到了该问题经典解的存在唯一性.进而,利用弱收敛方法得到了该问题弱解的存在唯一性.  相似文献   

3.
ONTHEEXISTENCEOFPERIODICSOLUTIONOFHIGHERORDERPERIODICSYSTEM(王全义)华侨大学,邮编:362011WangQuanyi(HuaqiaoUniversity)Abstract:Inthispap...  相似文献   

4.
An existence and uniqueness of solutions for boundary value problemsandare established, by employing a priori estimates for all solutions and the Schau-der fixed point theorem. Some of these results extend earlier results due toUsmani(1979), Yang(1988), and Pei(1997).  相似文献   

5.
Existence and partial uniqueness results are established,under a variety of conditions, for a system of equations arising in electrochemistry problems. The main idea is the reduction of the system to a single equation involving nonlocal terms. Upper and lower solution procedures are then applied to show both existence and uniqueness. In this way, results are obtained in more than one space dimension.  相似文献   

6.
利用混合单调算子不动点定理研究了一维非线性奇异P-Lapace差分方程边值问题,得到P-Lapace差分方程边值问题的存在唯一正解的充要条件.  相似文献   

7.
    
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8.
In this article, the existence and uniqueness of positive solution for a class of nonlinear fractional differential equations is proved by constructing the upper and lower control functions of the nonlinear term without any monotone requirement. Our main method to the problem is the method of upper and lower solutions and Schauder fixed point theorem. Finally, we give an example to illuminate our results.  相似文献   

9.
本文用Schauder不动点定理证明了一类用上下解方法难以解决的脉冲微分方程边值问题解的存在性,改进现有的一些结果。  相似文献   

10.
研究了n阶中立型方程(x(t)-cx(t-τ)^(n)+p(t)x(g(t))=0,t≥t0,n≥1(*)正解的存在性,在p(t)常号和变号的情况下,给出了(*)存在衰减正解的充分条件,特别,这偏离 文「2」,「4-6」和「8-12」的有关结果。  相似文献   

11.
考虑了一类非线性微分方程边值问题.通过应用Krasnoselskii锥不动点定理及不动点指数给出了这类问题解的存在性及多解性.所得结果推广了最近文献中一些相关结论.  相似文献   

12.
    
In this paper, we study the existence and uniqueness solutions of a fractional differential equation with multi-point boundary value problems. By using the fixed point theorems, some new results are established and two examples are given to demonstrate the application of main results.  相似文献   

13.
讨论具分布时滞的微分方程x′(t)=-a(t,x)x(t)+∫-0τf(t,r,x(t+r))dr,x′(t)=a(t,x)x(t)-∫0-τf(t,r,x(t+r))drx′(t)=-g(t,x(t))+∫0-τf(t,r,x(t+r))dr,x′(t)=g(t,x(t))-∫0-τf(t,r,x(t+r))dr正周期解问题,利用锥不动点定理,获得了这类问题正解存在性和多重性的充分条件,推广了已有文献的相关结果.  相似文献   

14.
    
This article is concerned with the existence and uniqueness of positive radial solutions for a class of quasilinear elliptic system. With some reasonable assumptions on the nonlinear source functions and their coefficients, the existence and the upper and lower bounds of the positive solutions will be provided by using the fixed point theorem and the maximum principle for the quasilinear elliptic system.  相似文献   

15.
根据非线性项的不同,用两个不动点定理研究一类分数阶微分方程正解的存在性及唯一性,且其解可找到迭代序列逼近.最后列举两个例子说明其结果的应用.  相似文献   

16.
利用Schauder不动点理论,引入线性变换,用逆变换的思想,定性与定量地研究一类中立型泛函微分方程周期解的问题,获得了这一类泛函微分方程周期解存在性与唯一性的充分条件.我们的研究方法异于相关文献中常用的方法.  相似文献   

17.
考察了形如{x″(t)+f(t,x(t))=0,0≤t≤1,x(0)=ξx(1),x′(1)=ηx′(0)的二阶非线性微分方程两点边值问题,这里ξ,η∈(0,1)∪(1,∞)为给定的常数,f:[0,1]×[0,∞)→[0,∞)连续。在某些适当的增长性条件下,应用Avery-Anderson-Krueger不动点定理证明了单调正解的存在性。  相似文献   

18.
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By fixed point theorem of a mixed monotone operators, we study Lidstone boundary value problems to nonlinear singular 2mth-order differential and difference equations, and provide sufficient conditions for the existence and uniqueness of positive solution to Lidstone boundary value problem for 2mth-order ordinary differential equations and 2mth-order difference equations. The nonlinear term in the differential and difference equation may be singular.  相似文献   

19.
本文运用Leray Schauder不动点定理和紧致性原理 ,证明了方程组周期解的存在性 .  相似文献   

20.
In this paper, the existence of positive solutions for a class of quasilinear elliptic differential equation systems are established by Schauder-TychonofF fixed point theorem.  相似文献   

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