共查询到19条相似文献,搜索用时 93 毫秒
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本文利用上下解方法得到了带Volterra型积分算子的非线性边值问题,u^n=f(t,u,u′,Tu),a1u(0)-a2u′(0)=A,b1u(1)+b2u′(1)=B解的存在性和唯一性。 相似文献
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龙菲菲 《纯粹数学与应用数学》2013,(4):425-432
运用Banach压缩映射原理以及Leray-Schauder连续性原理,在非线性项为L1-Caratheodory函数的条件下,研究了一类带积分边界条件的三阶微分方程边值问题解的唯一性、存在性以及解集的紧性. 相似文献
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研究具有3个CM公共值的亚纯函数唯一性问题,并且其中一函数满足某类微分方程.文中定理推广改进了G.Brosch的结果. 相似文献
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提出并证明了一类常微分方程解的存在唯一性成立的一个充要条件,并给出了多项式形式增长函数的一列上界.最终将此结果应用到证明一类倒向随机微分方程的唯一解问题. 相似文献
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本研究了一类自治泛函微分方程的普遗方面和泛函方面对解的性质的影响,在较为广泛的前提下证明了这类方程解的存在性唯一性、有界性及渐近性。 相似文献
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研究了如下形式的强退化抛物方程(C)(u)/(t)=(2A(u,x,t))/(x2)+(B(u,x,t))/(x),基于Holm gren方法,证明了弱解的惟一性. 相似文献
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Zhuoqun Wu & Hongjun Yuan 《偏微分方程(英文版)》1995,8(1):89-96
In this paper we study the uniqueness of generalized solutions for a class of quasilinear degenerate parabolic systems arising from dynamics of biological groups. The results obtained give an answer to a problem posed by A.S. Kalashnikov [1]. 相似文献
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We consider a quasilinear parabolic boundary value problem, the elliptic part of which degenerates near the boundary. In order to solve this problem, we approximate it by a system of linear degenerate elliptic boundary value problems by means of semidiscretization with respect to time. We use the theory of degenerate elliptic operators and weighted Sobolev spaces to find a priori estimates for the solutions of the approximating problems. These solutions converge to a local solution, if the step size of the time-discretization goes to zero. It is worth pointing out that we do not require any growth conditions on the nonlinear coefficients and right-hand side, since we lire able to prove L∞ - estimates. 相似文献
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一类Duffing型泛函微分方程周期解的存在与唯一性 总被引:1,自引:0,他引:1
汪娜 《数学的实践与认识》2009,39(3)
我们利用重合度理论,建立了一类Duffing型泛函微分方程存在唯一周期解的新结果. 相似文献
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Uniqueness and stability of solution for Cauchy problem of degenerate quasilinear parabolic equations 总被引:2,自引:0,他引:2
ZHAO Junning & ZHAN Huashui Department of Mathematics Xiamen University Xiamen China School of Science Jimei University Xiamen China 《中国科学A辑(英文版)》2005,48(5):583-593
The uniqueness and existence of BV-solutions for Cauchy problem of the form are proved. 相似文献
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In this paper, we consider the initial and mixed boundary value problems for the semiconductor equations with avalanche term, the uniqueness of the weak solution for the semiconductor equation has been proved. 相似文献