广义Kannan型压缩条件的注记

本文给出了 [4 ]中的广义Kannan型压缩条件下映象的一个不动点定理 ,说明了 [2 5]中广义Kannan型压缩条件下映象与 [1 ]中Kannan型压缩条件下映象具有一致的不动点存在性 .     

广义压缩映射的一种连续方法与广义扩张映射的不动点性质（英文）

本文给出了一类广义压缩映射的一种连续方法,在完备度量空间中建立了一类非自映射的一个同伦定理.引入了一类广义扩张映射,给出了它们的不动点定理,并在一定的条件下,证明了这些不动点构成了Banach空间中一个不可数的闭集.     

Menger PM-空间中广义非线性压缩映射的公共不动点定理及其应用

在Menger PM-空间中引入了两个新的广义非线性压缩的概念.在不要求三个映射任何连续性和单调性的情况下,研究了三个映射在广义非线性压缩条件下公共不动点的存在唯一性问题,获得了一些新的结果,推广和改进了最近相关文献中的定理.最后,给出了主要结果的一个例子.     

概率度量空间在分形图理论中的应用

给出广义概率度量空间上的随机压缩映射的新定义,统一了概率度量空间中的概率压缩,E-空间中的强压缩,随机度量空间中的几乎处处压缩和均匀压缩的定义.在广义概率度量空间上给出几个新的不动点定理,将概率度量空间中的一些熟知的不动点定理作为推论得到.利用这些不动点定理,得到分形图理论中随机迭代函数系统的遍历性定理.     

完备bv(s)-度量空间中广义ψ-Geraghty压缩的不动点定理

本文介绍了bv(s)-度量空间中广义ψ-Geraghty压缩的概念.利用不动点理论的方法获得了在完备bv(s)-度量空间中关于此压缩映射的不动点定理并且得到一些推论.此外,给出了一个支持本文主要结果的例子.     

完备b_v(s)-度量空间中广义ψ-Geraghty压缩的不动点定理（英文）

本文介绍了b_v(s)-度量空间中广义ψ-Geraghty压缩的概念.利用不动点理论的方法获得了在完备b_v(s)-度量空间中关于此压缩映射的不动点定理并且得到一些推论.此外,给出了一个支持本文主要结果的例子.     

Banach空间迭代序列的收敛性

先对相关基础知识进行了介绍说明,如拟增生类映象和压缩类映象,广义Lipschitz,两种迭代的迭代过程.然后阐述了目前已知相关结果,给出并论证了Mann迭代序列的收敛性.即在一致光滑的实Banach空间中,讨论并研究了带误差的Mann迭代逼近广义Lipschitz广义Φ-半压缩映象不动点的问题,改进和推广了现有的结果.     

偏序偏度量空间中有理分式型广义弱压缩的公共不动点结果北大核心CSCD

在偏序完备偏度量空间中研究了四个映射的公共不动点问题,对满足某种带有理分式项的广义弱压缩条件的四个映射得到了一些公共不动点结果.证明了公共不动点唯一的一个充分条件,并给出一个例子予以说明.最后讨论了在同伦问题中的一个应用.     

偏序偏度量空间中有理分式型广义弱压缩的公共不动点结果

在偏序完备偏度量空间中研究了四个映射的公共不动点问题,对满足某种带有理分式项的广义弱压缩条件的四个映射得到了一些公共不动点结果.证明了公共不动点唯一的一个充分条件,并给出一个例子予以说明.最后讨论了在同伦问题中的一个应用.     

高阶变时滞广义细胞神经网络的全局指数周期性

研究了高阶变时滞广义细胞神经网络的全局指数周期性.引入可调参数和通过构造合适的Lyapunov泛函并利用Brouwer压缩映象原理,得到了神经网络周期解存在唯一且全局指数周期与全局指数稳定的充分条件,并给出一个例子说明结论的有效性.     

A fixed point theorem for contraction type maps in partially ordered metric spaces and application to ordinary differential equations

We present a fixed point theorem for generalized contraction in partially ordered complete metric spaces. As an application, we give an existence and uniqueness for the solution of a periodic boundary value problem.     

偏距离空间上四个映射的公共不动点的存在性与唯一性

该文证明了偏距离空间上满足广义非线性压缩型的四个映射的公共不动点定理.最后,举例说明了该文压缩条件确实改进了目前一些文献中压缩条件.     

Preservation of the existence of fixed and coincidence points under homotopy of mappings of ordered sets

In problems of topology and analysis, well-known theorem on the preservation by any continuous homotopy of the property of a mapping to have a fixed point and the property of a pair of mappings to have a coincidence point are extensively applied. Thus, for contraction mappings and some of their generalizations, Frigon’s results on the preservation of the property to have a fixed point by a homotopy of a special type are known. This paper presents theorems on the preservation by order homotopy of the property of a pair of mappings to have a coincidence point. As a corollary, conditions under which such a homotopy preserves the property of a mapping to have a fixed point are obtained.     

Local and global existence and uniqueness results for impulsive functional differential equations with multiple delay

In this paper, we discuss local and global existence and uniqueness results for first-order impulsive functional differential equations with multiple delay. We shall rely on a fixed point theorem of Schaefer and a nonlinear alternative of Leray-Schauder. For the global existence and uniqueness we apply a recent nonlinear alternative of Leray-Schauder type in Fréchet spaces, due to Frigon and Granas [M. Frigon, A. Granas, Résultats de type Leray-Schauder pour des contractions sur des espaces de Fréchet, Ann. Sci. Math. Québec 22 (2) (1998) 161-168].     

Some new extensions of Banach’s contraction principle to partial metric space

In S.G. Matthews [S.G. Matthews, Partial metric topology, in: Proc. 8th Summer Conference on General Topology and Applications, in: Ann. New York Acad. Sci., vol. 728, 1994, pp. 183–197], the author introduced and studied the concept of partial metric space, and obtained a Banach type fixed point theorem on complete partial metric spaces. In this work we study fixed point results for new extensions of Banach’s contraction principle to partial metric space, and we give some generalized versions of the fixed point theorem of Matthews. The theory is illustrated by some examples.     

集—集映射向量极值问题的Lagrange乘子和鞍点定理

本文先建立了集－集映射的一个广义择一性定理．在目标为锥凸和满足 推广了的Ｓｌａｔｅｒ约束规格的条件下,我们利用本文的择一性定理,给出了集一集映射 向量极值问题关于锥－超极小解的Ｌａｇｒａｎｇｅ乘子定理和鞍点定理．     

Iterative construction of fixed points

Abstract, It is proved that an Ishikawa—type iteration scheme converges to the fixed point of a generalized contraction map in a convex metric space. The class of generalized contraction maps includes all quasi—contraction maps. Our theorem generalizes some recent important known results     

Uniqueness results for fractional functional differential equations with infinite delay in Fréchet spaces

In this article, a recent nonlinear alternative for contraction maps in Fréchet spaces due to Frigon and Granas [1998, Résultats de type Leray-Schauder pour des contractions sur des espaces de Fréchet, Ann. Sci. Math. Québec 22, 161–168] is used to investigate the existence and uniqueness of solutions for fractional order functional differential equations with infinite delay.     

Fuzzy压缩原理

本文给出以Ｆｕｚｚｙ数作为Ｌｉｐｓｃｈｉｔｚ常数的压缩映射的新概念，并成功证明了Ｆｕｚｚｙ数值函数的不动点定理。     

Fixed point theory for a new type of contractive multivalued operators

The aim of this paper is to discuss some basic problems (data dependence, well-posedness, nonself operators, homotopy results, generalized contractions) of the fixed point theory for a new type contractive multivalued operator. The results complement and extend some very recent results proved by M. Kikkawa and T. Suzuki, as well as, other theorems given by M. Frigon and A. Granas, S. Reich, I.A. Rus, etc.