共查询到20条相似文献,搜索用时 171 毫秒
1.
本文在完备可分的半序度量空间中,引入随机映射对F∶Ω×X×X×X→X与g∶Ω×X→X的随机g-混合单调性质以及随机可交换性质的定义,研究该映射对满足不同压缩条件下的三元随机重合点与三元随机不动点问题,所得结果推广已有文献中的一些随机不动点定理. 相似文献
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在完备的半序概率度量空间中建立了自映射对G∶X×X×X→X与g∶X→X,满足一定非线性压缩条件下的三元重合点与三元不动点定理,所得结果推广了已有文献中的若干二元重合点与二元公共不动点定理.最后给出主要结果的一个应用. 相似文献
3.
《数学物理学报(A辑)》2016,(1)
在半序概率度量空间中建立了映射对G:X×X×X→X与g:X→X的相容性概念.在不需要可交换的条件下,研究了相容映射在满足更一般的非线性压缩条件下的三元重合点与三元不动点问题,所得结果推广了已有文献中的二元重合点与二元公共不动点定理.最后,给出主要结果的一个具体应用. 相似文献
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该文在半序锥度量空间中研究了有关三个映射的公共不动点的存在唯一性,不要求映射的连续性和交换性,也不要求锥的正规性,其结果改进并推广了文献中的一些重要结论. 相似文献
6.
本文引进了一类新的压缩算子,即二元φ-序压缩算子,并且在完备的半序度量空间(其中的半序由φ所导出)上证明了几个二元φ-序压缩算子的不动点定理.本文所得的部分结论推广了最近一些文献中相应的结论. 相似文献
7.
Caristi不动点定理的推广 总被引:3,自引:0,他引:3
设X是距离空间,又是半序集,A:X→X是一个算子,满足对任给x∈X,都有x≤Ax。本文给出了A存在不动点的若干充分性条件,推广了著名的Caristi不动点定理。 相似文献
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该文获得了序Banach空间中随机序压缩映射存在不动点的充要条件.利用随机Mann迭代序列,给出了几个随机不动点收敛定理,改进了最近文献的相应结果. 相似文献
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半序度量空间中单调映射的不动点定理及混合单调映射的耦合不动点定理 总被引:18,自引:1,他引:18
本文在度量空间中引入半序,证明了半序度量空间中单调增加映射的不动点定理及混合单调映射的耦合不动点定理. 相似文献
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单值映射对与集值映射对的公共不动点 总被引:1,自引:0,他引:1
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。 相似文献
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在Banach空间介绍一类意义更广的随机集值系统x(ω)∈F(ω,x(ω),y(ω)),y(ω)∈G(ω,x(ω),y(ω)),并且在一定条件下证明这类系统随机解的存在性,其中F和G是随机集值映射. 相似文献
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Coupled fixed point theorems for nonlinear contractions in partially ordered metric spaces 总被引:1,自引:0,他引:1
V. Lakshmikantham Ljubomir iri 《Nonlinear Analysis: Theory, Methods & Applications》2009,70(12):4341-4349
We introduce the concept of a mixed g-monotone mapping and prove coupled coincidence and coupled common fixed point theorems for such nonlinear contractive mappings in partially ordered complete metric spaces. Presented theorems are generalizations of the recent fixed point theorems due to Bhaskar and Lakshmikantham [T.G. Bhaskar, V. Lakshmikantham, Fixed point theorems in partially ordered metric spaces and applications, Nonlinear Anal. TMA 65 (2006) 1379–1393] and include several recent developments. 相似文献
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In this paper, we prove some coupled coincidence point theorems for such nonlinear contraction mappings having a mixed monotone property in partially ordered metric spaces by dropping the condition of commutative. We also prove coupled common fixed point theorem for w-compatible mappings. An example of a nonlinear contraction mapping which is not applied by Lakshmikantham and ?iri?’s theorem [1] but applied by our result is given. Further, we apply our results to the existence theorem for solution of nonlinear integral equations. 相似文献
14.
A. Aliouche 《Journal of Mathematical Analysis and Applications》2008,341(1):707-719
We prove a common fixed point theorem of Gregus type for four mappings satisfying a generalized contractive condition in metric spaces using the concept of weak compatibility which generalizes theorems of [I. Altun, D. Turkoglu, B.E. Rhoades, Fixed points of weakly compatible mappings satisfying a general contractive condition of integral type, Fixed Point Theory Appl. 2007 (2007), article ID 17301; A. Djoudi, L. Nisse, Gregus type fixed points for weakly compatible mappings, Bull. Belg. Math. Soc. 10 (2003) 369-378; A. Djoudi, A. Aliouche, Common fixed point theorems of Gregus type for weakly compatible mappings satisfying contractive conditions of integral type, J. Math. Anal. Appl. 329 (1) (2007) 31-45; P. Vijayaraju, B.E. Rhoades, R. Mohanraj, A fixed point theorem for a pair of maps satisfying a general contractive condition of integral type, Int. J. Math. Math. Sci. 15 (2005) 2359-2364; X. Zhang, Common fixed point theorems for some new generalized contractive type mappings, J. Math. Anal. Appl. 333 (2) (2007) 780-786]. We prove also a common fixed point theorem which generalizes Theorem 3.5 of [H.K. Pathak, M.S. Khan, T. Rakesh, A common fixed point theorem and its application to nonlinear integral equations, Comput. Math. Appl. 53 (2007) 961-971] and common fixed point theorems of Gregus type using a strict generalized contractive condition, a property (E.A) and a common property (E.A). 相似文献
15.
Banach upper density recurrent points of <Emphasis Type="Italic">C</Emphasis><Superscript>0</Superscript>-flows 下载免费PDF全文
Let X denote a compact metric space with distance d and F:X×R→X or Ft:X→X denote a C0-flow. From the point of view of ergodic theory, all important dynamical behaviors take place on a full measure set. The aim of this paper is to introduce the notion of Banach upper density recurrent points and to show that the closure of the set of all Banach upper density recurrent points equals the measure center or the minimal center of attraction for a C0-flow. Moreover, we give an example to show that the set of quasi-weakly almost periodic points can be included properly in the set of Banach upper density recurrent points, and point out that the set of Banach upper density recurrent points can be included properly in the set of recurrent points. 相似文献
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Let(X, d) be a metric space and f be a continuous map from X to X. Denote by EP(f)and Ω(f) the sets of eventually periodic points and non-wandering points of f, respectively. It is well known that for a tree map f, the following statements hold:(1) If x ∈Ω(f)-Ω(f~n) for some n ≥ 2,then x ∈ EP(f).(2) Ω(f) is contained in the closure of EP(f). The aim of this note is to show that the above results do not hold for maps of dendrites D with Card(End(D)) = ?0(the cardinal number of the set of positive integers). 相似文献
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Hemant Kumar Nashine Zoran Kadelburg Stojan Radenovi? 《Applied mathematics and computation》2012,218(9):5422-5432
We establish coupled coincidence point results for mixed g-monotone mappings under general contractive conditions in partially ordered cone metric spaces over solid cones. We also present results on existence and uniqueness of coupled common fixed points. Our results generalize, extend and unify several well known comparable results in the literature. To illustrate our results and to distinguish them from the earlier ones, we equip the paper with examples. 相似文献
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The existence theorems of common fixed points for two weakly increasing mappings satisfying an almost generalized contractive condition in ordered metric spaces are proved. Some comparative example are constructed which illustrate the values of the obtained results in comparison to some of the existing ones in literature. 相似文献
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Naoki Shioji Tomonari Suzuki Wataru Takahashi 《Proceedings of the American Mathematical Society》1998,126(10):3117-3124
In this paper, we first study the relationship between weakly contractive mappings and weakly Kannan mappings. Further, we discuss characterizations of metric completeness which are connected with the existence of fixed points for mappings. Especially, we show that a metric space is complete if it has the fixed point property for Kannan mappings.
20.
M. Abbas 《Applied mathematics and computation》2010,217(1):195-5936
In this paper we introduce the concept of a w-compatible mappings to obtain coupled coincidence point and coupled point of coincidence for nonlinear contractive mappings in cone metric space with a cone having non-empty interior. Coupled common fixed point theorems for such mappings are also proved. Our results generalize, extend and unify several well known comparable results in the literature. Results are supported by three examples. 相似文献