有限族渐近非扩张映象具误差的隐迭代序列的弱收敛性与强收敛性

设E是实一致凸Banach空间,K是E的非空闭凸子集,{Ti}Ni=1:K→K是有限族渐近非扩张映象.在适当的条件下,证明了具误差的隐迭代序列弱收敛与强收敛于{Ti}Ni=1的公共不动点.所得结果改进和推广了有关的相应结果.     

Banach空间中渐近非扩张映象的修正Reich-Takahashi型迭代法的强收敛性

设E是具有一致正规结构的实Banach空间,其范数是一致Gateaux可微的.设D是E的非空有界闭凸子集,T:→D是渐近非扩张映象.该证明了,在一些适当的条件下,修正的Reich-Takahashi型迭代法强收敛到渐近非扩张映象T的不动点     

混合型渐近非扩张映射合成隐迭代序列的收敛性定理

在一致凸Banach空间中,研究了有限族渐近非扩张自映射和渐近非扩张非自映射的新的合成隐迭代序列的强收敛和弱收敛定理.得到的结果改进和推广了许多作者的相应结果.     

渐近非扩张映像具误差的合成隐迭代序列的弱收敛和强收敛定理

参照Banach压缩映像原理,在Banach空间合理引进一有限族渐近非扩张映像具误差的合成隐迭代式.在适当条件下获得了该合成隐迭代式给出的序列的弱收敛和强收敛定理.这个结果将2001年至2006年以来系列相关文献的隐迭代程序推广为具误差的合成隐迭代.主要结果还改进了这些文献的结果,去掉了2006年Chang S.S.的文章中闭凸集C+C C的假定以及2003年Sun Z.H.的文章中C的有界性假设条件.同时也解决了2001年Xu H.K.和Ori M.G.合著的文章中提出的开问题.     

非自反Banach空间中的度量投影

该文给出非自反Banach空间中一类超平面上度量投影的表达式．在近严格凸Banach空间中,研究了它们的连续性．对于对偶Banach空间X*,给出弱*闭子集上度量投影的一些连续性结果．     

Banach空间中渐近非扩张型半群的遍历定理

对带Opial条件的Banach空间中非扩张半群的不动点理论进行推广,得到了带Opial条件的Banach空间中渐近非扩张型半群的遍历收敛定理.     

Banach空间中渐近非扩张非自身映射带误差Noor迭代的收敛性定理

本文主要对三个渐近非扩张非自身映射引入了一种新的投影型Noor迭代程序,并在一致凸Banach空间中给出了该Noor迭代序列的弱与强收敛性定理.我们的主要结果推广和改进了该领域许多近期的结果.     

关于渐近非扩张映象不动点迭代的一点注记

设E是一致凸Banach空间,C是E的非空闭凸子集,T:C→C是具有不动点的渐近非扩张映象．该文证明了在某些适当的条件下,由下列修改了的Ishikawa迭代程序所定义的序列{xn}=xn 1=rpn,pn=(1-an)xn anTmn ryn un,yn=(1-bn)xn bnTkn xn vn, (n≥1)弱收敛到t的不动点．     

有限个广义渐近非扩张映射具误差的复合隐迭代过程

在一致凸Banach空间研究了一个新的有限个广义渐近非扩张映射具误差的复合隐迭代过程.利用空间满足Opial条件和算子满足半紧性条件,我们证明了这个隐迭代过程强、弱收敛于有限个广义渐近非扩张映射的公共不动点.这些结果是目前所得成果的完善和推广.     

Banach空间上Lipschitz拓扑半群的遍历压缩定理

在具Frechet可微范数的一致凸Banach空间中，给出了渐近非扩张拓扑半群的遍历压缩定理     

Nonexpansive mappings in metric and Banach spaces

The fundamental fixed point theorem for nonexpansive mappings is reformulated in the setting of a metric space possessing a convexity structure, and various constructive and nonconstructive proofs are compared. A new proof of the Browder-Göhde demiclosedness principle for mappings of the formI–T, T nonexpansive, is given, and a related result of R. E. Bruck in discussed.     

Monotone CQ iteration processes for nonexpansive semigroups and maximal monotone operators

Nakajo and Takahashi [K. Nakajo, W. Takahashi, Strong convergence theorems for nonexpansive mappings and nonexpansive semigroups, J. Math. Anal. Appl. 279 (2003) 372–379] proved strong convergence theorems for nonexpansive mappings, nonexpansive semigroups and the proximal point algorithm for zero-point of monotone operators in Hilbert spaces by the CQ iteration method. The purpose of this paper is to modify the CQ iteration method of K. Nakajo and W. Takahashi using the monotone CQ method, and to prove strong convergence theorems. In the proof process of this article, the Cauchy sequence method is used, so we proceed without use of the demiclosedness principle and Opial’s condition, and other weak topological techniques.     

Fixed Point Theorems and Convergence Theorems for a New Generalized Nonexpansive Mapping

Abstract

This paper introduces a new mapping that is weaker than nonexpansive mapping. The new mapping is different from the Suzuki’s generalized nonexpansive mapping. This paper introduces a new iteration process for the fixed point, and gives fixed point theorems and Convergence theorems for a new generalized nonexpansive mapping in Banach space, insteading of uniformly convex Banach space.     

Strong convergence theorems by Halpern-Mann iterations for relatively nonexpansive mappings in Banach spaces

In this paper, we modify Halpern and Mann’s iterations for finding a fixed point of a relatively nonexpansive mapping in a Banach space. Consequently, a strong convergence theorem for a nonspreading mapping is deduced. Using a concept of duality theorems, we also obtain analogue results for certain generalized nonexpansive and generalized nonexpansive type mappings. Finally, we discuss two strong convergence theorems concerning two types of resolvents of a maximal monotone operator in a Banach space.     

非扩张映射的不动点与变分包含问题的公共解

In this paper, we introduce an iterative scheme for finding a common element of the set of fixed points of a nonexpansive mapping and the set of solutions of the variational inclusion for an inverse-strongly monotone mapping and a maximal monotone mapping in a real Hilbert space. Then we show that the sequence converges strongly to a common element of two sets. Using the result, we consider the problem of finding a common fixed point of a nonexpansive mapping and a strictly pseudocontractive mapping in a real Hilbert space.     

集值非扩张映象不动点存在与收敛性

讨论了δ集值非扩张映象在一致凸Banach空间中不动点非空的充分必要条件与Ishikawa迭代序列的收敛性及确保迭代程序收敛到不动点的条件,所得结果是单值非扩张映象情形的推广和发展.     

Strong convergence theorems for nonexpansive mappings and inverse-strongly monotone mappings

In this paper, we introduce an iterative scheme for finding a common element of the set of fixed points of a nonexpansive mapping and the set of solutions of the variational inequality for an inverse-strongly monotone mapping in a Hilbert space. Then we show that the sequence converges strongly to a common element of two sets. Using this result, we consider the problem of finding a common fixed point of a nonexpansive mapping and a strictly pseudocontractive mapping and the problem of finding a common element of the set of fixed points of a nonexpansive mapping and the set of zeros of an inverse-strongly monotone mapping.     

A fixed point theorem for pointwise eventually nonexpansive mappings in nearly uniformly convex Banach spaces

The purpose of this paper is to prove the existence of a fixed point for a pointwise eventually nonexpansive mapping in a nearly uniformly convex Banach space. This provides an affirmative answer to a question given by Kirk and Xu [W.A. Kirk, Hong-Kun Xu, Asymptotic pointwise contraction, Nonlinear Anal. 69 (2008), 4706-4712].     

Hybrid iterative scheme for generalized equilibrium problems and fixed point problems of finite family of nonexpansive mappings

In this paper, we introduce a new mapping and a Hybrid iterative scheme for finding a common element of the set of solutions of a generalized equilibrium problem and the set of common fixed points of a finite family of nonexpansive mappings in a Hilbert space. Then, we prove the strong convergence of the proposed iterative algorithm to a common fixed point of a finite family of nonexpansive mappings which is a solution of the generalized equilibrium problem. The results obtained in this paper extend the recent ones of Takahashi and Takahashi [S. Takahashi, W. Takahashi, Strong convergence theorem for a generalized equilibrium problem and a nonexpansive mapping in a Hilbert space, Nonlinear Anal. 69 (2008) 1025–1033].     

一致凸Banach空间中渐近非扩张映射的迭代不动点定理

本文将Schu关于Hilbert空间中渐近非扩张映射的迭代不动点定理推广到一致凸Banach空间。