向量平衡问题解集的若干性质研究
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摘要
本文分别研究了向量平衡问题解集的连通性,若干参数(广义)向量平衡问题的解集映射的上、下半连续性和连续性,参数(广义)向量(拟)平衡问题的扰动集值(近似)解映射的Holder连续性及带有映射序列扰动情形下的向量平衡问题解集映射的Painleve-Kuratowski收敛性.全文共分九章,具体内容如下:
     1.第一章,我们介绍了向量平衡及其相关问题解集的连通性,向量平衡问题及其相关问题解集映射的上、下半连续性,Holder连续性以及带序列扰动的向量平衡问题解集的收敛性等方面的研究概况,并阐述了本文的选题动机和主要工作.
     2.在第二章,介绍了文中使用较多的一些概念及其性质.
     3.第三章,我们得到关于向量平衡问题正真有效解的一个新的稠密性结果,并利用这个结果获得了向量平衡问题解集连通性的个充分条件,推广和改进了文献[42,43]的结果.
     4.第四章,在较弱的条件下,讨论了弱广义集值平衡问题在考虑点附近的下半连续性.在Hausdorf(?)拓扑向量空间中,我们给出了参数(弱)广义集值平衡问题在考虑点附近下半连续的充分条件,此时所讨论问题的f-有效解集在考虑点附近是一个一般集合,而不是单点集.
     5.第五章,在没有单调性假设下,我们讨论了参数弱广义集值平衡问题解集映射的下半连续性,给出了一类参数广义集值平衡问题解集映射上半连续的一个新证明方法,还得到了退化情形下参数广义集值平衡问题解集映射的连续性结果,所得结果推广和改进了文献[63,65,66]中相应结果.
     6.第六章,运用线性标量化方法,我们得到了一类参数广义向量拟平衡问题解集映射的Holder连续性结果.这里,我们所讨论的算子不一定要求是有界的,所得结果推广了已有文献的相应结果(如[87]).
     7.第七章,在不需要将解集信息作为前提且不需要Holder强单调的假设下,我们在一般赋范空间中得到了参数广义集值平衡问题近似解集映射Holder连续的充分性条件.所得结果推广和改进了[84,85,116,117]中相应结果,并不同于[85,111]中的结果.
     8.第八章,在没有严格单调性假设下,我们分别在两类不同的条件下讨论了带有收敛映射序列的扰动向量平衡问题(广义系统)弱有效解集、有效解集和全局有效解集的Painleve-Kuratowski收敛性.所用的假设较文献[101]的假设更弱,所得结果改进了文献[101]中相应结果.
     9.第九章,我们作了一个简要的总结和讨论.
In this thesis, we discuss the connectedness on efficient solutions for vector equi-librium problems, the upper, lower semicontinuity and continuity on the solution map-pings to parametric (generalized) vector equilibrium problems, the Holder continuity on the (approximate) solution mappings to parametric (generalized) vector (quasi-)equilibrium problems, and Painleve-Kuratowski convergence of the solution sets for perturbed vector equilibrium problems with a sequence of mappings converging. This thesis is divided into nine chapters. It is organized as follows:
     1. In Chapter1, we describe the development and current researches on the topic of vector equilibrium problems, including the connectedness on efficient solutions to vector equilibrium problems, the upper, lower semicontinuity, continuity and Holder continuityon of the solution mappings to parametric (generalized) vector equilibrium problems, and Painleve-Kuratowski convergence of the solution sets for perturbed vector equilibrium problems with a sequence of mappings converging. We also give the motivation and the main research work.
     2. In Chapter2, some notions and propositions, which will be frequently used, are shown.
     3. In Chapter3, we give a density theorem of positive proper efficient solution to vector equilibrium problem. By using the density result, we provide a sufficient condition for the connectedness of efficient solutions to the vector equilibrium prob-lem. These results extend and improve the corresponding ones obtained in [42,43].
     4. In Chapter4, the lower semicontinuity of solution mappings for parametric (weak) generalized set-valued equilibrium problems is discussed. Under weaker conditions, we provide sufficient conditions for the lower semicontinuity of the solution map-pings to parametric (weak) generalized set-valued equilibrium problems in Haus-dorff topological vector spaces, where the f-solution set be a general set-valued one, but not a singleton.
     5. In Chapter5, without the assumption of strict monotonicity, we discuss the lower semicontinuity of solution maps for parametric weak generalized vector equilibrium problems, and get the upper semicontinuity of solution maps to a parametric gen-eralized vector equilibrium problem by using a new proof method. In degenerate case, the continuity of solution maps for parametric generalized vector equilibrium problems are also given. These results extend and improve the corresponding ones obtained in [63,65,66].
     6. In Chapter6, by using a linear scalarization method, we establish sufficient condi-tions for the Holder continuity of the solution mappings to a parametric generalized vector quasi-equilibrium problem with set-valued mappings, where the considered operator is not necessary a bounded operator. The results extend the recent ones in the recent literature (eg.[87]).
     7. In Chapter7, without any information of solution set and the assumption of Holder strong monotonicity, we obtain sufficient conditions for Holder continuity of ap-proximate solution mappings to parametric generalized vector equilibrium prob-lems with set-valued mappings in normed spaces. These results are different from the recent ones in the literature([85,111]), and also extend and improve some known results in the literature([84,85,116,117]).
     8. In Chapter8, without the assumption of strict monotonicity, we obtain the Painleve-Kuratowski Convergence of the weak efficient solution sets, efficient solution sets and global efficient sets for the perturbed vector equilibrium problems (generalized systems) with a sequence of mappings converging under two different kinds of as-sumptions, respectively. Because our condition is weaker than the assumption in [101], the results extend and improve the recent ones in the literature [101].
     9. In Chapter9, we summarize the results of this thesis and make some discussions.
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