共查询到19条相似文献,搜索用时 62 毫秒
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本文考虑如下这位问题:x″=f(t,x,x′)(0<t<1),x(0)=0,x(ξ)=x(1),其中ξ∈(0,1)是给定的.利用基于度理论的一定不动点定理,得到了以上过值问题有解的某些充分条件 相似文献
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本文在f(t,u,p)满足Nagumo条件下,以Mawhin连续定理为工具,得到三点边值问题x”=f(t,x(t),x’(t),t∈「0,1」 x(0)=0,x(1)=ax(η)的一个可解定理。 相似文献
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本文考虑如下三阶三点边值问题:x=f(t,x,x′,x″)(0≤x≤1),x∈B,其中B表以下边值条件之一:x′(0)=x′(1)=x(ξ)=0,x′(0)=x″(1)=x(ξ)=0,x″(0)=x′(1)=x(ξ)=0,ξ∈[0,1]是给定的.对以上边值问题,给出不限制f增长的可解条件. 相似文献
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非线性三点边值问题正解的存在性 总被引:9,自引:0,他引:9
马巧珍 《应用泛函分析学报》2001,3(2):178-182
本利用锥上的不动点定理,在f满足超线性条件或次线性条件下,讨论了边值问题u^n a(t)f(u)=0,r∈(0,1)u′(0)=0,u(1)=au(η)正确的存在性。 相似文献
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一类非线性泛函边值问题的可解性 总被引:2,自引:0,他引:2
本文考虑非线性泛函边值问题,利用Borsuk定理与Leray-Schauder不动点定理,得到了上述边值问题的若干可解性结果。 相似文献
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二阶三点边值问题正解的存在性 总被引:1,自引:0,他引:1
利用锥拉伸和压缩不动点定理,得到了二阶非线性三点边值问题u″(t)+a(t)u’(t)+b(t)u(t)+h(t)f(t,u,(t))=0,t∈(0,1)u(O)=βu(δη),u(1)=au(η)的正解存在性的充分条件,其中α,β∈[0,+∞),0〈η〈1 相似文献
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给出了以下边值问题正解存在的充分条件,(p(t)u′(t)′ α(t)f(t,u(t))=r(t) t∈(0,1) u(0)=0,au(η)=u(l)其中0<η<1,α>0,应用锥上的不动点定理证明在不同的假设条件下,以上边值问题仅有唯一正解,或有两个正解,或无数个正解. 相似文献
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Yu Zanping Zhou Zheyan School of Math.and Computer Science Fujian Normal University Fuzhou ) Shen Jianhe 《Annals of Differential Equations》2007,23(3):365-372
The paper aims to obtain existence and uniqueness of the solution as well as asymptotic estimate of the solution for singularly perturbed nonlinear third- order Robin boundary value problem with a turning point.In order to achieve this aim,existence and uniqueness of the solution for third-order nonlinear Robin boundary value problem is derived first based on the upper and lower solutions method under relatively weaker conditions.In this manner,the goal of this paper is gained by applying the existence and uniqueness results mentioned above. 相似文献
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EXISTENCE AND UNIQUENESS OF SOLUTIONS FOR HIGHER ORDER NONLINEAR THREE-POINT BOUNDARY VALUE PROBLEMS
Gao Yunzhu Pei Minghe 《Annals of Differential Equations》2007,23(4):405-409
In this paper,by using Leray-Schauder degree theory,we establish the exi- stence and uniqueness theorems for some higher order nonlinear three-point boundary value problems. 相似文献
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Jing Xiao Zhiguo Luo Dept. of Math. Hunan Normal University Changsha 《Annals of Differential Equations》2010,(1):70-76
In this paper, we study the existence of solutions to a three-point boundary value problem with nonlinear growth. Sufficient conditions for the existence of solutions to the system in the resonance and non-resonance cases are established by employing Leray-Schauder continuation theorem and the coincidence degree theory. 相似文献
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This paper is concerned with the solvability of a boundary value problem for a nonhomogeneous biharmonic equation. The boundary data is determined by a differential operator of fractional order in the Riemann-Liouville sense. The considered problem is a generalization of the known Dirichlet and Neumann problems. 相似文献
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马宇鸿 《纯粹数学与应用数学》1999,15(1):44-48
利用拓扑度理论,给出了边值问题u″(t)+λa(t)f(u(t))=0,0〈t〈1,au(0)-βu’(0)=0,γu(1)+δu’(1)=0两个非负解的存在性结果,这里允许a在t=0和t=1处有奇性。 相似文献
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Asiswellknown,nonlineartwo-pointboundaryvalueproblemisaclassicalbasicproblem.Theresultsofthisproblemareusuallyratherperfect.But,somenewproofsandimprovementsoftheseresultswillbeverymeaningfulandprofittherelatedproblem.Considerthefollowingboundaryvalueproblemwhereh(t,xl,x2)andf(t,xl,x2)arecontinuous,f(t,xl)x2)isboundedfortE[0,r],--co相似文献
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In this paper,we consider a multi-point boundary value problem. We obtain suffcient conditions ensuring the existence of at least three positive solutions to the boundary value problem. 相似文献