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借助路径提升问题,利用Banach空间吸引盆理论,研究了一类三阶伪抛物型方程初边值问题解的存在唯一性问题,给出其解存在唯一的充分条件,同时证明了一些已有的结论是本文主要定理的推论. 相似文献
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一类高阶多维非线性伪抛物组 总被引:5,自引:0,他引:5
肖黎明 《数学物理学报(A辑)》1993,13(3):303-309
本文研究了一类高阶多维非线性伪抛物组,通过解的先验估计,结合Leray-Schauder不动点定理,证明了初边值问题整体广义解的存在性与唯一性。 相似文献
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利用初值问题解的性态研究了三阶伪抛物型方程边值问题解存在与唯一性问题,给出其解存在唯一的充分条件,同时推广了Elcart and Sigillito的有关结果. 相似文献
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本文讨论了一类时滞非线性伪抛物型方程Cauchy问题有界解的存在唯一性问题 ,给出了有界解存在唯一的充分条件 . 相似文献
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本文讨论非线性奇异抛物方程第一边值问题解的存在性、唯一性、稳定性以及当t充分大时解的渐近性态.利用先验估计的方法得到:存在唯一的光滑正解,解在L^1范数意义下连续依赖于初值.t充分大时,||u-u↑-||L^2收敛于一个常数. 相似文献
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本文讨论了一类具奇异右端项的伪抛物方程的初边值问题的摄动,证明了摄动问题广义解的存在性及极限性态,并得到了当ε趋于零时,摄动问题的解在一定意义下收敛于原问题的解. 相似文献
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本文使用参数开拓法证明了非线性伪抛物型复方程在多连通区域上的Riemann-Hilbert初边值问题的可解性,并对近似解作出了误差估计。 相似文献
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In this paper, we first obtain an existence theorem of the solutions for a variational relation problem. An existence theorem
for a variational inclusion problem, a KKM theorem and an extension of the well know Ky Fan inequality will be established,
as particular cases. Some applications concerning a saddle point problem with constraints, existence of a common fixed point
for two mappings and an optimization problem with constraints, will be given in the last section of the paper. 相似文献
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对于具有一般非空闭凸集约束的变分不等式问题 ,本文给出了一个新的例外族的定义 .通过倩同伦不变定理 ,我们证明了一个择一定理 ,这给出了所考虑问题解的一个充分性条件 .特别 ,我们建立了变分不等式问题的一个新的存在性定理 ,推广了Zhao的一个最近的存在性结果 ,进而也推广了著名Mor啨关于非线性互补问题的存在性定理 . 相似文献
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Shapour Heidarkhani Massimiliano Ferrara Giuseppe Caristi Amjad Salari 《Acta Appl Math》2018,156(1):133-157
This article is concerned with the multiplicity results of the solutions for a Kirchhoff-type three-point boundary value problem. The method observed here is according to variational methods and critical point theory. In fact, through a consequence of the local minimum theorem due Bonanno and mountain pass theorem, we look into the existence results for our problem under algebraic conditions with the classical Ambrosetti-Rabinowitz (AR) condition on the nonlinear term. Furthermore, by combining two algebraic conditions on the nonlinear term, employing two consequences of the local minimum theorem due Bonanno we guarantee the existence of two solutions, and applying the mountain pass theorem given by Pucci and Serrin we establish the existence of third solution for the problem. 相似文献
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Erbil Cetin 《Journal of Mathematical Analysis and Applications》2007,334(2):876-888
In this paper we study the existence of solutions for Lidstone boundary value problems on time scale. Firstly, by using Schauder fixed point theorem in a cone, we obtain the existence of solutions to a Lidstone boundary value problem (LBVP). Secondly, existence result for this problem is also given by the monotone method. Finally, by using Krasnosel'skii fixed point theorem, it is proved that the LBVP has a positive solution. 相似文献
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在拓扑向量空间中,利用Ky Fan截口定理得到一个锥凸向量拟均衡问题弱Pareto解的存在性结果.作为该结果的应用,得到了一个对称向量拟均衡问题在支付映射为锥凸条件下弱Pareto解的存在性定理.该定理在较弱的条件下回答了Fu在文献[1]中提出的第二个问题,即在支付映射为锥凸且连续的条件下对称向量拟均衡问题的弱Pareto解是否存在.最后在赋范线性空间中研究了锥凸对称向量拟均衡问题弱Pareto解集的通有稳定性. 相似文献
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奇性边值问题的正解存在性 总被引:10,自引:0,他引:10
本文考虑具有奇性的两点边值问题,主要依据锥映射理论中的一个不动点定理,构造了一系列解的存在性条件,并在最后又证明了单减条件下奇性边值问题解的存在性的一个简明定理. 相似文献
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An existence theorem of a positive solution to a semipositone Sturm–Liouville boundary value problem
Qingliu Yao 《Applied Mathematics Letters》2010,23(12):1401-1406
We study a positive solution of the semipositone Sturm-Liouville boundary value problem in which the nonlinear term has no numerical lower bound. By considering the integration of certain limit growth functions and applying the Krasnosel’skii fixed point theorem on a cone, an existence theorem is proved, and a classical existence result is extended by this theorem. 相似文献
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A global existence theorem is established for an initial-boundary value problem,with time-dependent boundary data,arising in a lumped parameter model of pulse combustion; the model in question gives ri... 相似文献
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M. N. Sadikhov K. I. Khudaverdiev 《Computational Mathematics and Mathematical Physics》2011,51(3):404-422
As is well known, many problems of mathematical physics are reduced to one- and multidimensional initial and initial-boundary
value problems for, generally speaking, strongly nonlinear pseudoparabolic equations. The existence (local and global) and
uniqueness of a classical solution to a one-dimensional mixed problem with homogeneous Riquier-type boundary conditions are
analyzed for a class of fifth-order semilinear pseudoparabolic equations of the Korteweg-de Vries-Burgers type. For the classical
solution of the mixed problem, a uniqueness theorem is proved using the Gronwall-Bellman inequality, a local existence theorem
is proved by combining the generalized contraction mapping principle with the Schauder fixed point principle, and a global
existence theorem is proved by applying the method of a priori estimates. 相似文献
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By establishing the corresponding variational framework, and using the mountain pass theorem, linking theorem and Clark theorem in critical point theory, we give the existence of multiple solutions for a fourth-order difference boundary value problem with parameter. Under some suitable assumptions we obtain some results which ensure the existence of well precise interval of parameter for which the problem admits multiple solutions. Some examples are presented to illustrate the main results. 相似文献