随机凝聚型广义内向映射的随机不动点指数

本文引进了随机广义内向映射的随机不动点指数，利用该不动点指数我们得到了一些新的随机不动点定理，并给出了其一个应用．     

锥映像的不动点

引入了集值半紧１－集压缩锥映像 不动点指数，用不动点指数研究了该类映像的不动点。     

拓扑空间中一些新的不动点定理

介绍了我们在不动点定理方面的一些最新结果，包括：拓扑空间中Meir-Keeler型映象的不动点定理，有序拓扑空间中增算子和多值增映射的不动点定理，拓扑空间中压缩映象的不动点定理和多值映象的公共不动点定理。甚至在通常的度量空间，所有这些结果也是新的。     

CARISTI型Fuzzy混合不动点定理

本文提出ｆｕｚｚｙ混合不动点的概念，给出两个ｆｕｚｙ混合不动点定理和两个ｆｕｚｙ映象序列的公共ｆｕｚｚｙ混合不动点定理．本文的结果改进和推广了Ｃａｒｉｓｔｉ不动点定理及其近期的重要推广     

非光滑多目标规划的不动点算法(英)

本文讨论不动点算法在非光滑多目标规划中的应用，得到了一些新的最优性条件以及不动点与非光滑多目标的解之间的关系，并且给出了解非光滑多目标规划的不动点算法的收敛性．     

Banach空间中多值映象的不动点定理

本文中我们首先证明了一个不动点定理，同时从压缩及弱内向两个方向推广了压缩弱内向映象的不动点定理［１，２］．在后两节中讨论了Ｂａｎａｃｈ空间中无界闭子集上的不动点定理，所得结果推广了［３，４］中相应定理．     

Hadzic不动点定理的改进

本文给出Ｍｅｎｇｅｒ空间上多值压缩型映象的一个新的不动点定理，它是Ｈｅｄｚｉｃ不动点定理在某种意义下的改进。利用它，我们得到了度量空间上多值映象的一个不动点定理，统一并推广了文［６－１０］的某些重要结果。     

集值映象的图象拓扑与不动点的通用稳定性

本文进一步研究了上半连续集值映象不动点的稳定性问题，在集值映象的图象拓扑的意义下，我们证明了不动点的通用稳定性，也就是说，在Baire分类的意义下，绝大多数的映象具有本质不动点。     

随机1－集压缩算子的随机不动点指数和随机不动点定理

在［１］中我们建立了随机拓扑度并得到系列新的随机不动点定理，本文建立了随机１－集压缩算子的随机不动点指数理论，得到一些新的随机不动点定理，为研究各类随机方程提供一些存在性原理，给出了在随机Ｈａｍｍｅｒｓｔｅｉｎ积分方程的应用．     

非光滑多目标规划的不动点算法

本文讨论不动点算法在非光滑多目标规划中的应用，得到了一些新的最优性条件以及不动点与非光滑多目标的解之间的关系，并且给出了解非光滑多目标规划的不动点算法的收敛性。     

Leray-Schauder不动点定理的一个新证明

给出Leray-Schauder不动点定理的一个新证明.我们首先给出集值映射的焊接引理,利用集值映射的焊接引理和Kakutani不动点定理证明Leray-Schauder不动点定理,并证明Leray-Schauder不动点定理与Brouwer不动点定理等价.     

Preservation of Sahlqvist fixed point equations in completions of relativized fixed point Boolean algebras with operators

We define Sahlqvist fixed point equations and relativized fixed point Boolean algebras with operators (relativized fixed point BAOs). We show that every Sahlqvist fixed point equation is preserved under completions of conjugated relativized fixed point BAOs. This extends the result of Givant and Venema (1999) to the setting of relativized fixed point BAOs.     

概率度量空间中若干新的不动点定理*

本文提出了Z-M-PN空间的概念,在概率度量空间中我们得到了若干新的不动点定理。同时,一些着名的不动点定理在概率度量空间中得到了推广,诸如:Schauder不动点定理、郭大钧不动点定理和Petryshyn不动点定理被推广到M-PN空间;Altman不动点定理被推广到Z-M-PN空间。     

Symmetry structure of the hyperbolic bifurcation without reflection of periodic orbits in the standard map

For the area preserving maps, the linearized tangent map determines the stability of the fixed point. When the trace of the tangent map is less than −2, the fixed point is inversion hyperbolic, thus the subsequent points of mapping alternate across the destabilized fixed point. That is to say, the fixed point undergoes periodic doubling bifurcation. While for the trace of the tangent map is larger than +2, the fixed point undergoes the hyperbolic bifurcation without reflection. Here, the processes of the hyperbolic bifurcation without reflection in the standard map have been examined in terms of the higher order symmetry in the momentum inversion. It is shown that the higher order symmetry lines approach asymptotically to the separatrix of the hyperbolic fixed point, and the existing symmetry lines cannot determine the structure of the periodic islands born after the hyperbolic bifurcation without reflection.     

Distortion and stability of the fixed point property for non-expansive mappings

Let X be a Banach space. We say that X satisfies the fixed point property (weak fixed point property) if every non-expansive mapping defined from a convex closed bounded (convex weakly compact) subset of X into itself has a fixed point. We say that X satisfies the stable fixed point property (stable weak fixed point property) if the same is true for every equivalent norm which is close enough to the original one. Denote by P(X) the set formed by all equivalent norms with the topology of the uniform convergence on the unit ball of X. We prove that the subset of P(X) formed by the norms failing the fixed point property is dense in P(X) when X is a non-distortable space which fails the fixed point property. In particular, no renorming of ?₁ can satisfy the stable fixed point property. Furthermore, we show some examples of distortable spaces failing the weak fixed point property, which can be renormed to satisfy the stable weak fixed point property. As a consequence we prove that every separable Banach space can be renormed to satisfy the stable weak fixed point property.     

Generalizations of fixed point theorems and computation

As a powerful mechanism, fixed point theorems have many applications in mathematical and economic analysis. In this paper, the well-known Brouwer fixed point theorem and Kakutani fixed point theorem are generalized to a class of nonconvex sets and a globally convergent homotopy method is developed for computing fixed points on this class of nonconvex sets.     

A fixed point theorem for the infinite-dimensional simplex

We define the infinite-dimensional simplex to be the closure of the convex hull of the standard basis vectors in R^∞, and prove that this space has the fixed point property: any continuous function from the space into itself has a fixed point. Our proof is constructive, in the sense that it can be used to find an approximate fixed point; the proof relies on elementary analysis and Sperner's lemma. The fixed point theorem is shown to imply Schauder's fixed point theorem on infinite-dimensional compact convex subsets of normed spaces.     

Generalized KKM theorems and common fixed point theorems

In this paper, we first prove a generalized KKM theorem, and then use this generalized KKM theorem to establish the generalized equi-KKM theorem, common fixed point theorems for a family of multivalued maps, and the Kakutani-Fan-Glicksberg fixed point theorem. We also show that an existence theorem of the common fixed point theorem is equivalent to the Kakutani-Fan-Glicksberg fixed point theorem.     

Fixed Point Theorems and a New System of Multivalued Generalized Order Complementarity Problems*

Some new fixed point and coupled fixed point theorems for multivalued increasing type mappings are obtained and a new system of multivalued generalized order complementarity problems is introduced in this paper. In terms of new fixed point and coupled fixed point theorems, we give some existance results of solutions for this new system of multivalued generalized order complementarity problems. The results presented in this paper extend and improve the corresponding results announced by Isac and Kostreva.     

The Split Common Fixed Point Problem for Directed Operators

We propose the split common fixed point problem that requires to find a common fixed point of a family of operators in one space whose image under a linear transformation is a common fixed point of another family of operators in the image space. We formulate and analyze a parallel algorithm for solving this split common fixed point problem for the class of directed operators and note how it unifies and generalizes previously discussed problems and algorithms.