单值映射对与集值映射对的公共不动点

在度量空间中,引进了单值映射对与集值映射对的调和概念,对调和单值映射对与集值映射对建立了公共不动点定理及相应的随机公共不动点定理。     

局部凸空间拟非扩张集值映射不动点定理

§1 引言 Husian和Tarafdar[1]在局部凸线性拓扑空间内研究了非扩张型集值映射的不动点问题,推广了Browder定理[2]Kirk[3]等人的有名结果,本文讨论更一般的拟非扩张集值映射的不动点问题,并给出满足一定边界条件的拟非扩张非自映射的不动点定理。     

欧氏空间的集值映射不动点

本文通过取凸包与闭包,利用关系正常法,Lebesgue测度和均匀连续映射,讨论欧氏空间的集值映射的不动点,获得了一些结果.     

局部凸空间中的不动点定理

证明了局部凸空间中非凸集上的上半连续凝集值映射的一个Ｌｅｒａｙ－Ｓｃｈａｕｄｅｒ型不动点定理,并推广了一些已知的不动点定理。     

一个集值映射的不动点定理

M.Lassonde在[3]中用逼近论和同伦方法证明了几个非凸集上的集值映射的不动点定理。本文推广了[3]中的定理3.15,得到一个较好的不动点定理及若干有用的推论。     

集值邻近连续映射

关于单值邻近连续映射的概念及性质已为人们所熟知,而研究集值邻近连续映射的论文至今尚未见到.本文给出了集值邻近连续映射和上、下半弱集值邻近连续映射的定义、判定条件和它们之间的关系.最后,研究了上(下)半弱集值邻近连续映射与众所周知的上(下)半集值连续映射之间的关系.从而得到了集值邻近连续映射与已知的集值连续映射之间的关系.     

关于集值映射的极大极小定理

在锥序线性空间中建立了关于集值映射的不动点型极大极小定理,从而扩大了关于极大极小定理的应用范围     

半紧1—集压缩映射的不动点定理及固有值...

本文给出了与Ｌｅｒａｙ－Ｓｃｈａｕｄｅｒ边界条件紧密相关的其它五种形式：弱ＬＳ、弹ＢＰ、ＬＳＢ、弱ＣＲ和弱向内条件，并阐述这些条件之间关系。在此基础上，我们得到 了半紧１－集压缩映射的不动点定理及固有值。     

集值映射的可测性与连续性

引进《集D关于集β对于关系《是正常的》这个概念,由两个单值映射组成,再通过取凸包和闭包,构造了可测集值映射、上下半连续集值映射和连续集值映射.     

一个集值映射的不动点定理

得到了从度量空间X(不必是完备的)到X的非空有界子集族B(X)的集值映射的一些不动点,其结果推广了一些已有的结论.     

集值映射空间上的自然映射(英文)

In this paper,we discuss the continuities of some natural mappings on pointcompact continuous set-valued mapping spaces with compact-open topology and obtain the properties of set-valued injective mappings,set-valued diagonal mappings,induced mappings,set-valued evaluation mappings,set-valued topological sum mappings and set-valued topological product mappings.     

The Derived Mappings and the Order of a Set-Valued Mapping Between Topological Spaces

Previous investigations of, in particular, continuous selections have led to the definition of the derived mappings and, here, the order of a set-valued mapping between topological spaces. The relation between the topological spaces and the possible orders of set-valued mappings between them is considered and examples are constructed to show that each ordinal number is the order of some set-valued mapping.     

On Set-Valued Differentiation and Integration

Both the notion of differential of a set-valued mapping and the concept of a set-valued integral are introduced in such a way that, on the one hand, the class of differentiable mappings is rather extensive, while on the other hand, the concept of integral includes as special cases Dinghas' approach and Pontryagin's alternated integral. At the same time, the differential of an integral with respect to the upper limit of integration equals in some sense the integrant. Thus the differentiation of a set-valued mapping can be interpreted as an operation inverse to set-valued integration. Both the differential and the integral are defined via approximation by quasi-affine mappings introduced below. The class of quasi-affine mappings is compared with the classes of affine, semi-affine, eclipsing and multi-affine mappings.     

Generic Existence of Fixed Points for Set-Valued Mappings

We first consider a complete metric space of nonexpansive set-valued mappings acting on a closed convex subset of a Banach space with a nonempty interior, and show that a generic mapping in this space has a fixed point. We then establish analogous results for two complete metric spaces of set-valued mappings with convex graphs.     

Inverse of the Sum of Set-Valued Mappings and Applications

In this article, we develop results on the behavior of fixed points sets of set-valued pseudo-contraction mappings. Then, we investigate the notions related to the Aubin property and make use of connections between the two involved set-valued nonnecessarily Lipschitzian mappings to obtain results on the inverse of their sum similar to those in the literature generalizing Lyusternik and Graves theorems. By proximal convergence, we apply our results to the sensitivity analysis of variational inclusions.     

完备凸度量空间中(次)相容和集值广义非扩张映象的公共不动点定理

本文在完备凸度量空间中,利用集值和单值映象(次)相容的一些条件,建立了数值广义非扩张映象存在公共不动点的一个充要条件和一个充分条件.我们的结果改进、扩充和发展了文[2～7]中的主要结果.     

Coincidence theorem for admissible set-valued mappings and its applications in FC-spaces

A new coincidence theorem for admissible set-valued mappings is proved in FC-spaces with a more general convexity structure. As applications, an abstract variational inequality, a KKM type theorem and a fixed point theorem are obtained. Our results generalize and improve the corresponding results in the literature.     

抽象凸空间中集值映射的不动点定理及其应用

A new fixed point theorem and the selection property for upper semi-continuous set-valued mappings in abstract convexity space are established. As their applications the existence of Nash equilibrium for n-person non-cooperative generalized games is proved.     

An Extension of Set-Valued Contraction Principle for Mappings on a Metric Space with a Graph and Application

In this paper, we obtain an existence theorem for fixed points of contractive set-valued mappings on a metric space endowed with a graph. This theorem unifies and extends several fixed point theorems for mappings on metric spaces and for mappings on metric spaces endowed with a graph. As an application, we obtain a theorem on the convergence of successive approximations for some linear operators on an arbitrary Banach space. This result yields the well-known Kelisky–Rivlin theorem on iterates of the Bernstein operators on C[0,1].     

方向导数和广义锥-预不变凸集值优化问题

讨论拓扑向量空间中无约束集值优化问题的最优性条件问题.利用集值映射的Dini方向导数,在广义锥-预不变凸性条件下,建立了集值优化问题关于弱极小元和强极小元的最优性充分必要条件.