共查询到20条相似文献,搜索用时 306 毫秒
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利用Green函数的性质、u_0-边界函数、不动点指数定理及锥压缩与锥拉升不动点定理,研究一类具p-laplacian算子的含积分边界条件的微分方程边值问题解的存在性. 相似文献
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非自治时滞微分方程正周期解的存在性 总被引:1,自引:0,他引:1
廖新元 《纯粹数学与应用数学》2003,19(3):268-273
应用Krasnoselskii锥映射不动点定理,研究了具一般时滞非线性非自治Logistic方程的ω-周期解的存在性,获得了存在正周期解的充分条件. 相似文献
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通过利用锥上的不动点定理,本文主要研究具无穷时滞Nicholson’s blowflies模型的正概周期解的存在唯一性.从而得到此正概周期解存在唯一性和指数收敛的充分条件.最后给出一个例子说明本文结果的可行性. 相似文献
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本文研究了具可变号非线性项的非线性边值问题的正解存在性,推广了 Krasnoselskii 不动点定理,得到了新的锥上不动点定理,并应用这些定理给出这类边值问题正解的存在性. 相似文献
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应用锥上的不动点指数理论,研究固定时刻脉冲作用的奇异半正Dirichlet边值问题,给出了系统至少一个正解存在的充分条件,同时给出了具体的例子,改进了蒋达清等人的结果. 相似文献
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双锥不动点定理及其在非线性边值问题中的应用 总被引:3,自引:0,他引:3
本文研究了具可变号非线性项的非线性边值问题的正解存在性,推广了Krasnoselskii不动点定理,得到了新的锥上不动点定理,并应用这些定理给出这类边值问题正解的存在性. 相似文献
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Existence of positive solutions for fourth‐order impulsive integral boundary value problems on time scales 下载免费PDF全文
Fatma Tokmak Fen Ilkay Yaslan Karaca 《Mathematical Methods in the Applied Sciences》2017,40(16):5727-5741
This paper is devoted to the existence of positive solutions for a fourth‐order impulsive boundary value problem with integral boundary conditions on time scales. Existence results of at least two and three positive solutions are established via the double fixed point theorem and six functionals fixed point theorem, respectively. Also, an example is given to illustrate the theoretical results. Copyright © 2017 John Wiley & Sons, Ltd. 相似文献
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Existence of positive solutions for Sturm-Liouville boundary value problems on the half-line 总被引:2,自引:0,他引:2
In this paper, we establish sufficient conditions to guarantee the existence of at least one positive solution, a unique positive solution, and multiple positive solutions for the Sturm-Liouville boundary value problem on the half-line. By using an effective operator, the fixed point theorems in cone, especially Krasnoselskii fixed point theorem, can be applied to such systems and then existence criteria are established. The interesting point of the results is that the nonlinear term f can be sign-changing. 相似文献
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This work presents sufficient conditions for the existence ofat least one positive solution for a nonlinear fourth-orderbeam equation under Lidstone boundary conditions. The main toolused is a fixed point theorem that essentially combines themonotone iterative technique with fixed point theorems of coneexpansion or compression type. The last section contains twoexamples that complement some related results existent in theliterature. 相似文献
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In this article, we study a coupled system of impulsive boundary value problems for nonlinear fractional order differential equations. We obtain sufficient conditions for existence and uniqueness of positive solutions. We use the classical fixed point theorems such as Banach fixed point theorem and Krasnoselskii’s fixed point theorem for uniqueness and existence results. As in application, we provide an example to illustrate our main results. 相似文献
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研究了含积分边界条件的分数阶微分方程的边值问题,首先给出格林函数及性质,其次将问题转化为一个等价的积分方程,最后应用Krasnoselkii及Leggett-Williams不动点定理得到了一个及多个正解的存在性,推广了以往的结果. 相似文献
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The asymptotic behavior of discrete type-K monotone dynamical systems and reaction-diffusion equations is investigated. The studying content includes the index theory for fixed points, permanence, global stability, convergence everywhere and coexistence. It is shown that the system has a globally asymptotically stable fixed point if every fixed point is locally asymptotically stable with respect to the face it belongs to and at this point the principal eigenvalue of the diagonal partial derivative about any component not belonging to the face is not one. A nice result presented is the sufficient and necessary conditions for the system to have a globally asymptotically stable positive fixed point. It can be used to establish the sufficient conditions for the system to persist uniformly and the convergent result for all orbits. Applications are made to time-periodic Lotka-Volterra systems with diffusion, and sufficient conditions for such systems to have a unique positive periodic solution attracting all positive initial value functions are given. For more general time-periodic type-K monotone reaction-diffusion systems with spatial homogeneity, a simple condition is given to guarantee the convergence of all positive solutions. 相似文献
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《Journal of Computational and Applied Mathematics》2006,193(1):269-276
Here we are concerned with the existence of positive solution for autonomous and nonautonomous second-order systems with multi-points boundary conditions. For nonautonomous systems we use the Schauder's fixed point theorem in a suitable Banach space, while for autonomous ones using fixed point theorems is usually useless because of the existence of trivial solution and for this we employed a method based on the implicit function theorem and topological degree. In order to verify the obtained results, we have considered some definite systems to verify the results numerically. 相似文献
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This paper deals with the existence of multiple positive solutions for multi-point boundary value problems with p-Laplacian on infinite intervals. By using three fixed point theorems in cones, especially a five functionals fixed point theorem, we obtain the sufficient conditions for the existence of at least one, two and three positive solutions, respectively. Two examples are also given in this paper to illustrate the main results. 相似文献
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Xingfang Feng Hanying Feng Huixuan Tan Yatao Du 《Journal of Applied Mathematics and Computing》2013,41(1-2):269-282
This paper concerns the existence of positive solutions for systems of a fourth-order singular semipositone Sturm-Liouville boundary value problem. By applying the fixed point index theorem, some sufficient conditions for positive solutions are established. An example is given to demonstrate the application of our main results. 相似文献