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THREE KINDS OF DENTABILITIES IN BANACH SPACES AND THEIR APPLICATIONS
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作者 张子厚 周晶 《Acta Mathematica Scientia》 SCIE CSCD 2024年第2期445-454,共10页
In this paper,we study some dentabilities in Banach spaces which are closely related to the famous Radon-Nikodym property.We introduce the concepts of the weak^(*)-weak denting point and the weak^(*)-weak^(*)denting p... In this paper,we study some dentabilities in Banach spaces which are closely related to the famous Radon-Nikodym property.We introduce the concepts of the weak^(*)-weak denting point and the weak^(*)-weak^(*)denting point of a set.These are the generalizations of the weak^(*)denting point of a set in a dual Banach space.By use of the weak^(*)-weak denting point,we characterize the very smooth space,the point of weak^(*)-weak continuity,and the extreme point of a unit ball in a dual Banach space.Meanwhile,we also characterize an approximatively weak compact Chebyshev set in dual Banach spaces.Moreover,we define the nearly weak dentability in Banach spaces,which is a generalization of near dentability.We prove the necessary and sufficient conditions of the reflexivity by nearly weak dentability.We also obtain that nearly weak dentability is equivalent to both the approximatively weak compactness of Banach spaces and the w-strong proximinality of every closed convex subset of Banach spaces. 展开更多
关键词 weak^(*)-weak denting point nearly weak dentability very smooth space point of weak^(*)-weak continuity extreme point approximatively weak compactness w-strong proximinality REFLEXIVITY
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Space Topologies and Their Dual Space Topologies for Conventional Functional Space Topologies
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作者 Mahjoub A. Elamin 《Journal of Applied Mathematics and Physics》 2024年第3期778-804,共27页
In this paper, we have studied the topology of some classical functional spaces. Among these spaces, there are standard spaces, spaces that can be metrizable and others that cannot be metrizable. But they are all topo... In this paper, we have studied the topology of some classical functional spaces. Among these spaces, there are standard spaces, spaces that can be metrizable and others that cannot be metrizable. But they are all topological vector spaces and it is in this context that we have chosen to present this work. We are interested in the topology of its spaces and in the topologies of their dual spaces. The first part, we presented the fundamental topological properties of topological vector spaces. The second part, we studied Frechet spaces and particularly the space S(R<sup>n</sup>) of functions of class C<sup>∞ </sup>on R<sup>n</sup> which are as well as all their rapidly decreasing partial derivatives. We have also studied its dual S'(Rn</sup>) the space of tempered distributions. The last part aims to define a topological structure on an increasing union of Frechet spaces called inductive limit of Frechet spaces. We study in particular the space D(Ω) of functions of class C<sup>∞</sup> with compact supports on Ω as well as its dual D' (Ω) the space distributions over the open set Ω. 展开更多
关键词 Linear Forms Dual spaces Frechet spaces Partial Derivatives DISTRIBUTIONS Topological Structure weak Topology Strong Topology
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ATOMIC DECOATOMIC DECOMPOSITIONS AND DUALS OF WEAK HARDY SPACES OF B-VALUED MARTINGALES 被引量:6
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作者 马涛 刘培德 《Acta Mathematica Scientia》 SCIE CSCD 2009年第5期1439-1452,共14页
In this article, several weak Hardy spaces of Banach-space-valued martingales are introduced, some atomic decomposition theorems for them are established and their duals are investigated. The results closely depend on... In this article, several weak Hardy spaces of Banach-space-valued martingales are introduced, some atomic decomposition theorems for them are established and their duals are investigated. The results closely depend on the geometrical properties of the Banach space in which the martingales take values. 展开更多
关键词 MARTINGALE atomic decomposition weak Hardy space geometry of Banach space
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Atomic Decompositions of Weak Hardy Spaces of B-Valued Martingales 被引量:4
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作者 MA Tao LIU Peide 《Wuhan University Journal of Natural Sciences》 EI CAS 2006年第3期456-460,共5页
The atomic decompositions of weak Hardy spaces of Banach-space-valued martingales are given. With the help of the atomic decompositions, some inequalities for B-valued martingales are established in the case 0〈r≤1. ... The atomic decompositions of weak Hardy spaces of Banach-space-valued martingales are given. With the help of the atomic decompositions, some inequalities for B-valued martingales are established in the case 0〈r≤1. Here the results are connected closely with the p-uniform smoothness and q-uniform convexity of Banach spaces which the martingales take values in. 展开更多
关键词 atomic decomposition weak Hardy space B-valued martingale
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WEAK ORLICZ SPACE AND ITS CONVERGENCE THEOREMS 被引量:3
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作者 刘宁 叶永刚 《Acta Mathematica Scientia》 SCIE CSCD 2010年第5期1492-1500,共9页
In this article, a class of weak Orlicz function spaces is defined and their basic properties are discused. In particular, for the sequences in weak Orlicz space, we establish several basic convergence theorems includ... In this article, a class of weak Orlicz function spaces is defined and their basic properties are discused. In particular, for the sequences in weak Orlicz space, we establish several basic convergence theorems including bounded convergence theorem, control convergence theorem and Vitali-type convergence theorem and so on. Moreover, the conditional compactness of its subsets is also discussed. 展开更多
关键词 weak Orlicz space convergence theorem conditional compactness
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WEAK ATOMIC DECOMPOSITIONS OF MARTINGALE HARDY-LORENTZ SPACES AND APPLICATIONS 被引量:2
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作者 任颜波 郭铁信 《Acta Mathematica Scientia》 SCIE CSCD 2012年第3期1157-1166,共10页
In this article, we establish some atomic decomposition theorems for martin- gale Hardy-Lorentz spaces. As applications, with the help of weak atomic decompositions, some interpolation theorems for martingale Hardy-Lo... In this article, we establish some atomic decomposition theorems for martin- gale Hardy-Lorentz spaces. As applications, with the help of weak atomic decompositions, some interpolation theorems for martingale Hardy-Lorentz spaces are proved. 展开更多
关键词 Martingale Hardy-Lorentz space weak atom atomic decomposition inter- polation
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BOUNDEDNESS OF COMMUTATORS ON HOMOGENEOUS MORREY-HERZ SPACES OVER LOCALLY COMPACT VILENKIN GROUPS 被引量:3
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作者 Jianglong Wu 《Analysis in Theory and Applications》 2009年第3期283-296,共14页
This paper studies some boundedness results of commutators on a class of new spaces MKp,q^αλ (G) named as homogenous Morrey-Herz spaces over locally compact Vilenkin groups
关键词 Vilenkin group homogeneous morrey-herz space COMMUTATOR
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CONTINUITY OF MARCINKIEWICZ INTEGRALS ON HOMOGENEOUS MORREY-HERZ SPACES 被引量:2
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作者 Lisheng Shu Rulong Xie 《Analysis in Theory and Applications》 2007年第3期201-212,共12页
Let μΩ,b^m be the higher order commutator generated by Marcinkiewicz integral μΩ and a BMO(R^n) function b(x). In this paper, we will study the continuity of μΩ and μΩ,b^m on homogeneous Morrey-Herz spaces.
关键词 morrey-herz space Marcinkiewicz integral COMMUTATOR bounded mean oscillation
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CBMO ESTIMATES FOR MARCINKIEWICZ INTEGRALS ON HOMOGENEOUS MORREY-HERZ SPACES 被引量:1
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作者 Xiangzheng Yang Xiaoli Chen Yuqing Liu 《Analysis in Theory and Applications》 2008年第3期271-279,共9页
The boundedness of the commutator μΩ,b generalized by Marcinkiewicz integral μΩ and a function b(x) ∈ CBMOq (Rn) on homogeneous Morrey-Herz spaces is established.
关键词 morrey-herz space Herz space Marcinkiewicz integral COMMUTATOR rough kernel
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COMMON FIXED POINT OF GENERALIZED WEAKLY CONTRACTIVE MAPS IN PARTIAL METRIC SPACES 被引量:1
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作者 Vesna COJBAIC RAJIC Stojan RADENOVIC Sunny CHAUHAN 《Acta Mathematica Scientia》 SCIE CSCD 2014年第4期1345-1356,共12页
In this paper, using the context of complete partial metric spaces, some common fixed point results of maps that satisfy the generalized (ψ, Ф)-weak contractive conditions are obtained. Our results generalize, ext... In this paper, using the context of complete partial metric spaces, some common fixed point results of maps that satisfy the generalized (ψ, Ф)-weak contractive conditions are obtained. Our results generalize, extend, unify, enrich and complement many existing results in the literature. Example are given showing the validaty of our results. 展开更多
关键词 Common fixed point lower semi-continuous function weak (ψ Ф)-contraction partial metric space
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ODEs IN BANACH SPACES AND FIXED POINTS OF WEAKLY INWARD MAPS 被引量:2
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作者 韩志清 《Acta Mathematica Scientia》 SCIE CSCD 1995年第1期74-82,共9页
This paper is an attempt to investigate systematically fixed points of weakly inward maps by using some basic results from differential equations in Banach spaces. By investigating the Poincare operators for such diff... This paper is an attempt to investigate systematically fixed points of weakly inward maps by using some basic results from differential equations in Banach spaces. By investigating the Poincare operators for such differential equations, we establish a fixed point index theory for two classes of weakly inward maps. 展开更多
关键词 weakLY INWARD MAPS DIFFERENTIAL EQUATION IN BANACH space
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Unique Common Fixed Points for Two Weakly C~*-contractive Mappings on Partially Ordered 2-metric Spaces 被引量:1
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作者 Piao Yong-jie 《Communications in Mathematical Research》 CSCD 2018年第1期77-88,共12页
In this paper, we give existence theorems of common fixed points for two mappings with a weakly C*-contractive condition on partially ordered 2-metric spaces and give a sufficient condition under which there exists a ... In this paper, we give existence theorems of common fixed points for two mappings with a weakly C*-contractive condition on partially ordered 2-metric spaces and give a sufficient condition under which there exists a unique common fixed point. 展开更多
关键词 2-metric space weak C*-contraction common fixed point
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Weakly δ-continuous Correspondences on Super-space 被引量:1
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作者 CHEN Gui-xiu 《Chinese Quarterly Journal of Mathematics》 CSCD 2010年第2期287-292,共6页
In the paper,we define weakly δ-continuous correspondences on super-space,On the basis of δ-open(closed) sets,θ-open(closed) sets and regular open(closed) sets in topological space,some equivalent conditions of thi... In the paper,we define weakly δ-continuous correspondences on super-space,On the basis of δ-open(closed) sets,θ-open(closed) sets and regular open(closed) sets in topological space,some equivalent conditions of this kind of correspondences are obtained,and some applications of subset nets and convergence nets are given. 展开更多
关键词 topological space super-space weakly δ-continuous correspondences subset nets
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Common Fixed Point Theorems for Compatible and Weakly Compatible Maps in G-Metric Spaces 被引量:1
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作者 Asha Rani Sanjay Kumar +1 位作者 Naresh Kumar S. K. Garg 《Applied Mathematics》 2012年第10期1128-1134,共7页
In this paper first we prove common fixed point theorems for compatible and weakly compatible maps. Secondly, we prove common fixed point theorems for weakly compatible maps along with property (E.A.) and (CLRg) prope... In this paper first we prove common fixed point theorems for compatible and weakly compatible maps. Secondly, we prove common fixed point theorems for weakly compatible maps along with property (E.A.) and (CLRg) property respectively. 展开更多
关键词 G-metric spaceS Compatible MAPS weakLY Compatible MAPS PROPERTY (E.A.) (CLRg) PROPERTY
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Common Fixed Point Theorems for Weakly Compatible Mappings in Fuzzy Metric Spaces Using (JCLR) Property 被引量:1
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作者 Sunny Chauhan Wutiphol Sintunavarat Poom Kumam 《Applied Mathematics》 2012年第9期976-982,共7页
In this paper, we prove a common fixed point theorem for a pair of weakly compatible mappings in fuzzy metric space using the joint common limit in the range property of mappings called (JCLR) property. An example is ... In this paper, we prove a common fixed point theorem for a pair of weakly compatible mappings in fuzzy metric space using the joint common limit in the range property of mappings called (JCLR) property. An example is also furnished which demonstrates the validity of main result. We also extend our main result to two finite families of self mappings. Our results improve and generalize results of Cho et al. [Y. J. Cho, S. Sedghi and N. Shobe, “Generalized fixed point theorems for compatible mappings with some types in fuzzy metric spaces,” Chaos, Solitons & Fractals, Vol. 39, No. 5, 2009, pp. 2233-2244.] and several known results existing in the literature. 展开更多
关键词 Fuzzy Metric space weakLY Compatible MAPPINGS (E.A) PROPERTY (CLR) PROPERTY (JCLR) PROPERTY
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Weak KKM theorems in generalized finitely continuous space with applications
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作者 方勉 王磊 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2013年第10期1291-1296,共6页
Some new weak Knaster-Kuratouski-Mazurkiewicz (KKM) theorems are proved under the noncompact situation in the generalized finitely continuous space (GFC-space) without any convexity. As applications, the minimax i... Some new weak Knaster-Kuratouski-Mazurkiewicz (KKM) theorems are proved under the noncompact situation in the generalized finitely continuous space (GFC-space) without any convexity. As applications, the minimax inequalities of the Ky Fan type are also given under some suitable conditions. The results unify and generalize some known results in recent literatures. 展开更多
关键词 weak Knaster-Kuratouski-Mazurkiewicz (KKM) mapping generalized finitely continuous space (GFC-space minimax inequality GFC-quasicovex
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Boundedness of Multilinear Oscillatory Singular Integral on Weighted Weak Hardy Spaces
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作者 Yali Pan Changwen Li 《Analysis in Theory and Applications》 CSCD 2015年第4期373-380,共8页
In this paper, by using the atomic decomposition of the weighted weak Hardy space WH;(R;), the authors discuss a class of multilinear oscillatory singular integrals and obtain their boundedness from the weighted wea... In this paper, by using the atomic decomposition of the weighted weak Hardy space WH;(R;), the authors discuss a class of multilinear oscillatory singular integrals and obtain their boundedness from the weighted weak Hardy space WH;(R;) to the weighted weak Lebesgue space WL;(R;) for ω∈A;(R;). 展开更多
关键词 Multilinear oscillatory singular integral A1(Rn) weighted weak Hardy space
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Boundedness of Multilinear Commutators with Rough Kernels on Morrey-Herz Spaces
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作者 Qiaoni Li Shuangping Tao 《Analysis in Theory and Applications》 2013年第3期289-307,共19页
This paper is concerning the commutators generated by the multilinear singular integral with rough kernels and BMO functions. The boundedness of the multilinear commutators Tb→ (f→) is established on the Morrey-He... This paper is concerning the commutators generated by the multilinear singular integral with rough kernels and BMO functions. The boundedness of the multilinear commutators Tb→ (f→) is established on the Morrey-Herz space by using the John-Nirenberg inequality. 展开更多
关键词 Multilinear operator rough kernel COMMUTATOR morrey-herz space.
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Boundedness of Some Singular Integral Operators on Morrey-Herz Spaces over Locally Compact Vilenkin Groups
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作者 WU JIANG-LONG LIU QING-GUO 《Communications in Mathematical Research》 CSCD 2011年第2期147-155,共9页
In this paper the boundedness results for some fractional and singular integral operators on the homogeneous Morrey-Herz spaces over locally compact Vilenkin groups are shown.
关键词 Vilenkin group morrey-herz space singular integral fractional integral
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Characterization of Type p Banach Spaces by the Weak Law of Large Numbers
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作者 Gan Shi-xin School of Mathematics and Statistics, Wuhan University, Wuhan 430072, Hubei, China 《Wuhan University Journal of Natural Sciences》 EI CAS 2002年第1期14-19,共6页
For weighted sums of the form ?j = 1kn anj Xnj\sum {_{j = 1}^{k_n } } a_{nj} X_{nj} where {a nj , 1 ?j?k n ↑∞,n?1} is a real constant array and {X aj , 1≤j≤k n, n≥1} is a rowwise independent, zero mean, rando... For weighted sums of the form ?j = 1kn anj Xnj\sum {_{j = 1}^{k_n } } a_{nj} X_{nj} where {a nj , 1 ?j?k n ↑∞,n?1} is a real constant array and {X aj , 1≤j≤k n, n≥1} is a rowwise independent, zero mean, random element array in a real separable Banach space of typep, we establishL r convergence theorem and a general weak law of large numbers respectively, conversely, we characterize Banach spaces of typep in terms of convergence inr-th mean and probability for such weighted sums. 展开更多
关键词 Key words Banach space of typep array of random elements weighted sums weak law of large numbers {a nj } uniform integrability L r convergence convergence in probability
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