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.     

Banach空间中线性流形的单值度量投影算子部分

为了研究Banach空间集值线性映射包含y∈M(x)的最小范数极值解,其中X,Y为Banach空间,M X×Y为线性流形,本文引入Banach空间X×Y中线性流形的单值度量算子部分,并给出了该算子部分的结构的刻划.为在另文将Lee S J与NashedM Z所引进并研究的Hilbert空间中集值线性映射包含的最小二乘解推广到Banach空间奠定了理论基础.     

关于压缩映射与扩张映射不动点问题的迭代算法［英文］

本文给出Hilbert空间与Banach空间中关于压缩映射、扩张映射的若干迭代格式,证明这些映射的不动点集与均衡问题解集的强(弱)收敛定理,本文改进和推广了相关文献中的结果.     

关于压缩映射与扩张映射不动点问题的迭代算法(英文)

本文给出Hilbert空间与Banach空间中关于压缩映射、扩张映射的若干迭代格式,证明这些映射的不动点集与均衡问题解集的强(弱)收敛定理,本文改进和推广了相关文献中的结果.     

有限维P-框架的冗余函数

最近,Hilbert空间里有限维框架的冗余度性质已被证明.本文把Hilbert空间里有限维框架量化冗余度的概念推广到Banach空间里有限维p-框架,研究定义在Banach空间球面上的冗余函数的最大值和最小值,并给出上冗余度和下冗余度的性质.     

Banach空间中增生型映射的投影迭代算法,数值试验及应用

在实一致凸且q一致光滑Banach空间中,利用Sunny保核收缩映射,构造了一种新的迭代格式.借助于Lyapunov泛函,度规函数与广义投影映射等分析工具,证明了迭代序列{x_n}强收敛到无穷个m增生映射{Ai}与无穷个θ_i逆强增生映射{B_i}之和的公共零点的结论.进行了数值试验验证了迭代格式的合理性.将以往在Hilbert空间中的相关研究成果推广到了较一般的Banach空间中.最后,展示了新迭代算法在微分边值系统,凸规划问题和极大极小问题上的应用.     

复Swift-Hohenberg方程在一些Banach空间内的指数吸引子

本文研究了N-维(N≤3)复Swift-Hohenberg方程在一些Banach空间x~α中解的渐近行为.运用Cholewa等人的技巧,证明了整体解的存在性以及整体吸引子A的存在性.最后,作为本文的另—个主要结果,证明了指数吸引子M的存在性,从而得到A有有限的分形维数.由于应用于Hilbert空间中所谓的挤压性质在我们的框架下不能成立,为了构造M,没有应用Hilbert空间中的标准的方法,而是应用Efendiev,Miranville,和Zelik最近的结果.     

鞅不等式与 Banach 空间的凸性和光滑性

我们用 B 值鞅的 P 方函数 S~(p)f 的 a.e.有限性刻划了 Banach 空间的p 一致可凸性质,建立了这种函数的凸Φ函数不等式,讨论了这些不等式成立的条件,鞅变换的性质以及鞅的局部收敛性与 Banach 空间的 q一致凸性和 p一致光滑性的关系,同时给出了超自反空间以及与 Hilbert 空间同构的 Banach空间的特征.     

Banach空间的框架及原子分解的性质

本文利用Hilbert空间的框架理论对Banach空间的框架和原子分解的性质进行了研究,给出了Banach空间的框架和原子分解的一个充分条件,并讨论了Banach空间的框架和原子分解的关系。     

Banach空间中解变分包含问题的超松弛临界点算法

把Verma关于解变分包含问题的超松弛临界点算法(over-relaxed proximalpoint algorithm)从Hilbert空间扩展为q一致光滑Banach空间.并且导出了更为广义的超松弛临界点算法,在较弱的条件下证明了它的收敛性质.因此,研究结果可以应用于L~p,W~(m,p)(Ω)(p1)等空间.     

Exceptional family of elements and solvability of variational inequalities for mappings defined only on closed convex cones in Banach spaces

In this paper, we generalize the concept of exceptional family of elements for a completely continuous field from Hilbert spaces to Banach spaces and we study the solvability of the variational inequalities with respect to a mapping f that is from a closed convex cone of a Banach space B to the dual space B^∗ by applying the generalized projection operator πK and by using the Leray-Schauder type alternative.     

Existence and algorithm of solutions for general set-valued Noor variational inequalities with relaxed (μ,ν)-cocoercive operators in Hilbert spaces

The purpose of this paper is to suggest and analyze a number of iterative algorithms for solving the generalized set-valued variational inequalities in the sense of Noor in Hilbert spaces. Moreover, we show some relationships between the generalized set-valued variational inequality problem in the sense of Noor and the generalized set-valued Wiener-Hopf equations involving continuous operator. Consequently, by using the equivalence, we also establish some methods for finding the solutions of generalized set-valued Wiener-Hopf equations involving continuous operator. Our results can be viewed as a refinement and improvement of the previously known results for variational inequality theory.     

Generalized projections, decompositions, and the Pythagorean-type theorem in Banach spaces

In this paper, we investigate new properties of the generalized projection operators on convex closed cones in uniformly convex and uniformly smooth Banach spaces; establish decompositions theorems for arbitrary elements both in primary and dual spaces; and prove the Banach space analogue of the Pythagorean-type theorem. Earlier, all these results were known only in Hilbert spaces.     

Systems of generalized nonlinear variational inequalities and its projection methods

Based on relaxed cocoercive monotonicity, a new generalized class of nonlinear variational inequality problems is presented. Our results improve and extend the recent ones announced by [H. Y. Huang, M. A. Noor, An explicit projection method for a system of nonlinear variational inequalities with different (γ,r)$(\gamma ,r)$-cocoercive mappings, Appl. Math. Comput. 190 (2007) 356–361; S. S. Chang, H. W. Joseph Lee, C. K. Chan, Generalized system for relaxed cocoercive variational inequalities in Hilbert spaces, Appl. Math. Lett. 20 (2007) 329–334; R. U. Verma, Generalized system for relaxed cocoercive variational inequalities and its projection methods, J. Optim. Theory Appl. 121 (2004) 203–210; M. A. Noor, General variational inequalities, Appl. Math. Lett. 1 (1988) 119–121] and many others.     

Stampacchia’s Property,Self-duality and Orthogonality Relations

We show that if the conclusion of the well known Stampacchia Theorem on variational inequalities holds on a real Banach space X, then X is isomorphic to a Hilbert space. Motivated by this, we obtain a relevant result concerning self-dual Banach spaces and investigate some connections between properties of orthogonality relations, self-duality and Hilbert space structure. Moreover, we revisit the notion of the cosine of a linear operator and show that it can be used to characterize real Banach spaces that are isomorphic to a Hilbert space. Finally, we present some consequences of our results to quadratic forms and to evolution triples.     

集值变分包含的投影算法

A class of set-valued variational inclusions in Banach spaces and the convergence of the iterative algorithms are all studied in this paper.Moreover,the convergence and applications of projection algorithm to set-valued variational inclusions in Hilbert are also introduced.Many conclusions are generalized and improved.     

Banach ideals of operators with applications

We present some results concerning the general theory of Banach ideals of operators and give several applications to Banach space theory. We give, in Section 3, new proofs of several recent results, as well as new operator characterizations of the $\text{L}$_p-spaces of Lindenstrauss and Pelczynski. In Section 4 we prove that the space of absolutely summing operators from E to F is reflexive if both E and F are reflexive and E has the approximation property. Section 5 concerns Hilbert spaces. In particular, we compute the relative projection constant of Hilbert spaces in L_p(μ)-spaces.     

An estimate of the Banach-Mazur distances between Hilbert spaces and Banach spaces

We discuss a geometric property that provides tools for the estimate of the Δ₂ on spaces of Rademacher functions with values on a Banach space for particular sequences of vectors. We obtain in this way a technique to study those Banach spaces that are isomorphic to Hilbert spaces. In particular, an estimate of the Banach-Mazur distance between such these spaces is obtained.     

Hilbert空间中的广义松弛上强制变分不等式组

主要利用三步投影方法模型讨论了带误差估计的广义非线性上强制变分不等式组的逼近解及其收敛性,所得到结果推广和改进了一系列最新结果.