关于混合型多项式Hammerstein积分方程正解迭代求法

本文给出了混合型多项式Ｈａｍｍｅｒｓｔｅｉｎ积分方程正解的迭代求法，并将所得结果应用到二阶非线性常微分方程的边值问题     

带Riemann-Stieltjes积分条件的三阶边值问题的单调正解

研究了一类带Riemann-Stieltjes积分条件的非线性三阶非局部边值问题,将边值问题正解存在性的研究转化为扰动Hammerstein积分方程的研究,通过构造Green(格林)函数及讨论其性质,运用推广的Leggett-Williams型不动点定理,得到了至少存在3个和2n-1个正解的存在性准则, 所得结果推广和改进了最近文献中的结果,并充分反映了非线性项含导数对正解存在性研究的影响.主要结果由实例加以阐述.     

带有积分与无穷点边值条件的分数阶微分方程的正解（英文）

研究一类带有积分边值条件和无穷点边值条件的分数阶微分方程的正解问题.借助Green函数有关的性质,并利用锥上不动点定理,获得该问题正解的存在性结果.最后给出一个例子说明所得结果的应用性.     

抽象空间中一类带奇异性的混合型积分-微分方程边值问题的正解

利用不动点指数理论,研究了Banach空间中一类带奇性的混合型积分——微分方程边值问题正解的存在性,得到了多个正解存在的充分条件,并给出了相应的例子以说明所得结果的合理性和应用性.     

一类分数阶微分方程积分边值问题正解的分歧性

利用分歧方法和拓扑度理论,研究了一类带参数的分数阶微分方程积分边值问题正解的存在性.根据格林函数的性质,得到了系统正解的存在的若干充分条件.最后,通过数值例子验证了所得结果的有效性.     

带权函数的积分方程组正解的对称性和单调性

主要研究全空间上一类带权函数的积分方程组正解的径向对称性和单调性问题．在合适条件下,主要利用积分形式的移动平面方法,Hardy—Littlewwood—Sobolev（HLS）和Holder不等式给出了积分方程组正解的径向对称性和单调性的结论．这一结论很好的推广了已有的结果．     

一类无穷区间上高阶分数阶微分方程边值问题的正解（英文）

本文利用Leggett-Williams不动点定理研究无穷区间上带有积分边值条件的高阶分数阶微分方程边值问题多个正解存在性.最后给出一个例子说明我们所得结果的应用.     

一类分数阶奇异微分方程积分边值问题正解的存在性

研究一类具有Riemann-Liouville导数的分数阶奇异微分方程积分边值问题的可解性.运用Guo-Krasnoselskii不动点定理,得到了奇异微分方程积分边值问题正解的存在性定理.最后,给出了一个实例,用于说明所得结论的有效性.     

Riemann-Stieltjes积分边值问题正解的存在唯一性

利用解的先验估计和极值原理,研究了一类具有Riemann-Stieltjes积分边值问题正解的存在唯一性．     

含多调和延拓算子的积分方程组的Liouville型定理

本文研究上半空间一类含有多调和延拓算子的积分方程组正解的分类问题.在某些自然结构假设下,利用积分形式的移动球面法和上半空间的积分不等式,获得了该积分方程组正解的Liouville型定理,推广了已有的结果.     

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．     

Positive almost automorphic solutions for a class of non-linear delay integral equations

This article is concerned with a class of non-linear delay integral equations, which unify some extensively studied delay integral equations. We establish a new existence and uniqueness theorem about positive almost automorphic solutions of the delay integral equations. Our theorem can deal with some cases to which many known results are not applicable. Two examples are given to illustrate our results.     

一类中立型积分方程的正的概周期解

本文利用混合单调算子中的迭代技巧,研究了一类中立型积分方程正的概周期解的存在性,以前相关结果得以推广.     

一类中立型积分方程的正的概周期解

通过构建锥中一个新的不动点定理,讨论了一类中立型积分方程正的概周期的存在性,得到了一些新的结果.     

On the positive almost periodic type solutions for some nonlinear delay integral equations

In this paper, we discuss the existence of positive almost periodic type solutions for some nonlinear delay integral equations, by constructing a new fixed point theorem in the cone. Some known results are extended.     

TWO POSITIVE PERIODIC SOLUTIONS OF NONLINEAR INTEGRAL EQUATION ON THE INFINITE INTERVAL MODELLING INFECTIOUS DISEASE

In this paper, by applying Avery-Henderson fixed point theorem in a cone, we establish some new existence results of two positive periodic solutions for a type of nonlinear integral equations with variant delay.     

POSITIVE WEIGHTED PSEUDO-ALMOST PERIODIC SOLUTIONS TO INFINITE DELAY INTEGRAL EQUATION

This paper studies the existence of almost periodic type solutions to the nonlinear infinite delay integral equation. By means of the fixed theorem on a suitable space with Hilbert’s projective metric, we establish some sufficient conditions for the existence of positive weighted pseudo-almost periodic solutions to the equation.     

Existence of Positive Solutions for Singular Fourth Order Coupled System with Sign Changing Nonlinear Terms

This paper deals with the existence of positive solutions to a singular fourth order coupled system with integral boundary conditions. Since the nonlinear terms $f$, $g$ may change sign or be singular at $t = 0$ or $t = 1$, the authors make a priori estimates to overcome some difficulties and apply Guo-Krasnoselskii fixed point theorem to prove the existence of solutions of the system under suitable assumptions. Finally, some examples to illustrate the main results are given.     

新的不动点定理及应用

本文获得了几个压缩型映射的不动点定理,改进了相应文献的结果．应用该定理,给出了一类时滞积分方程的正概周期解的存在性结果．推广了已有的结果．     

Applications of Measure of Noncompactness and Darbo’s Fixed Point Theorem to Nonlinear Integral Equations in Banach Spaces

We prove a theorem on the existence of solutions of some nonlinear functional integral equations in the Banach algebra of continuous functions on the interval [0,a]. Then we consider a nonlinear integral equation of fractional order and give some sufficient conditions for existence of solutions of this equation. We use fixed point theorems associated with the measure of noncompactness as the main tool. Our existence results include several results obtained in previous studies. Finally we present some examples which show that our results are applicable.