一类Caputo分数阶微分方程多点边值问题的多解性

本文讨论了一类Caputo分数阶微分方程多点边值问题的多解性,通过把分数阶微分方程的边值问题转化成与其等价的积分方程问题求出边值问题的Green函数并得到其格林函数的相关性质,最后利用锥上不动点指数定理研究分数阶微分方程多点边值问题正解和多个正解的存在性.     

一类带p-Laplacian算子分数阶微分方程边值问题的正解

本文应用凸锥上的不动点定理,讨论了一类带p-Laplacian算子分数阶微分方程边值问题的正解的存在性,分别得到了这类边值问题至少存在一个正解和多个正解的充分条件.最后,给出了两个具体的例子.     

分数阶微分方程积分边值问题多个正解的存在性

研究了带有积分边值条件的分数阶微分方程的边值问题.利用LeggettWilliams不动点定理,以及一些分析技巧得到了这类分数阶微分方程边值问题多个正解的存在性.     

一类分数阶微分方程m点边值问题正解的存在性

给出了一类分数阶微分方程m点边值问题的格林函数,通过讨论其性质,运用uo有界算子和不动点指数理论,在与相应的线性算子第一特征值有关的条件下获得了分数阶微分方程多点边值问题正解及多个正解的存在性结果.     

一类分数阶微分方程边值问题的三个正解

利用锥上Avery-Peterson不动点定理,研究了一类分数阶微分方程积分边值问题正解的存在性,给出了该边值问题至少存在三个正解的充分条件.     

一类非线性项带导数的p-Laplacian边值问题正解的存在性和多解性

本文研究了一类非线性项带导数的p-Laplacian算子的分数阶微分方程边值问题正解的存在性和多解性.首先,利用分数阶微分方程和边值条件给出了该边值问题的Green函数,然后利用Guo-Krasnosel’skii’s不动点定理和Leggett-Williams不动点定理得出该边值问题一个或者三个正解的存在性结论.作为应用,给出两个例子验证了结论的适用性,特别是,用迭代法进行了逼近模拟,给出解的图形.值得一提的是此文研究的微分方程的非线性项是带有Riemann-Liouville型分数阶微分.     

一类高阶分数阶微分方程组多点边值问题的多解性

对于一类高阶分数阶微分方程组多点边值问题,借助于Leggett-Williams不动点定理和Leray-Schauder不动点定理研究了该问题至少有三个正解及任意奇数个正解的存在性,所得结果推广了已有文献的存在性结果,并举例验证主要结果.     

半直线上Riemann-Liouville型奇异分数阶微分方程边值问题的单调迭代方法

运用不动点定理和单调迭代方法研究半直线上Riemann-Liouville型奇异分数阶微分方程边值问题的正解的存在性.在没有上、下解存在的假设下建立了边值问题存在两个正解的结果,构造了逼近正解的迭代格式,该迭代格式便于应用.     

p-Laplacian分数阶微分方程边值问题正解的存在性

在这篇文章,我们讨论了一类p-Laplacian分数阶微分方程边值问题正解的存在性,应用凸锥上的不动点定理,我们得到了这类边值问题至少存在一个和两个正解的充分条件.     

一类含积分边界条件的分数阶微分方程的正解的存在性北大核心CSCD

本文研究了一类含积分边界条件的分数阶微分方程的边值问题,利用格林函数的性质和Krasnoselskii不动点定理,得到了至少有一个,两个正解存在以及正解不存在的充分条件.     

Existence of three positive solutions for a class of Riemann-Liouville fractional q-difference equation

In this paper, we confirm the existence of three positive solutions for a class of Riemann-Liouville fractional $q$-difference equation which satisfies the boundary conditions. We gain several sufficient conditions for the existence of three positive solutions of this boundary value problem by applying the Leggett-Williams fixed point theorem.     

NONEXISTENCE OF POSITIVE SOLUTIONS FOR A FOUR-POINT BOUNDARY VALUE PROBLEM FOR FRACTIONAL DIFFERENTIAL EQUATION

In this paper, we investigate the nonexistence of positive solutions for a class of four-point boundary value problem of nonlinear differential equation with fractional order derivative. We give sufficient conditions on nonlinear term and the parameter such that the boundary value problem has no positive solutions. Some examples are presented to illustrate the main results.     

Two-point boundary value problems for finite fractional difference equations

In this paper, we introduce a two-point boundary value problem for a finite fractional difference equation. We invert the problem and construct and analyse the corresponding Green's function. We then provide an application and obtain sufficient conditions for the existence of positive solutions for a two-point boundary value problem for a nonlinear finite fractional difference equation.     

SOLVABILITY FOR FRACTIONAL MULTI-POINT BOUNDARY VALUE PROBLEMS ON HALF LINE

In this paper,we consider the fractional multi-point boundary value problem. By Leggett-Williams fixed point theorem,sufficient conditions that guarantee the existence of three positive solutions are obtained.     

Positive solutions for nonlinear Caputo fractional differential equations with integral boundary conditions

In this paper, we consider the properties of Green’s function for a class of nonlinear Caputo fractional differential equations with integral boundary conditions by constructing an available integral operator. By means of well-known fixed point theorems and lower and upper solutions method, some new existence and nonexistence criteria of single or multiple positive solutions for fractional differential equation boundary value problems are established. As applications, some interesting examples are presented to illustrate the main results.     

Solvability for nonlinear singular fractional differential systems with multi-orders

In this paper, we consider the existence of positive solutions for a class of nonlinear singular fractional differential systems with multi-orders. Our analysis relies on fixed point theorems on cones. Some sufficient conditions for the existence of at least one or two positive solutions for boundary value problem of nonlinear singular fractional differential systems with multi-orders are established. As an application, an example is presented to illustrate the main results.     

Positive solutions for fractional differential systems with nonlocal Riemann–Liouville fractional integral boundary conditions

In this paper, we study the positive solutions of fractional differential system with coupled nonlocal Riemann–Liouville fractional integral boundary conditions. Our analysis relies on Leggett–Williams and Guo–Krasnoselskii’s fixed point theorems. Two examples are worked out to illustrate our main results.     

On positive solutions to fractional sum boundary value problems for nonlinear fractional difference equations

In this paper, we study a new class of 3‐point boundary value problems of nonlinear fractional difference equations. Our problems contain difference and fractional sum boundary conditions. Existence and uniqueness of solutions are proved by using the Banach fixed‐point theorem, and existence of the positive solutions is proved by using the Krasnoselskii's fixed‐point theorem. Copyright © 2015 John Wiley & Sons, Ltd.     

含积分边界条件的分数阶微分方程边值问题的正解的存在性

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．