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1.
本文在Banach空间中对变分不等式的例外簇,严格可行性及解的存在性三者之间的关系进行了研究,将补问题中的相应结果进行了推广.首先通过定义一类新的例外簇,在映射为拟单调的情况下,证明了变分不等式解的存在性与例外簇之间的关系,即若变分不等式不存在例外簇,则解一定存在.其次主要证明了变分不等式的严格可行性与例外簇之间的关系,即若变分不等式存在严格可行性,则例外簇不存在.  相似文献   

2.
给出了变分不等式的例外簇的一个新定义 ,十分简洁地证明它是Zhao ,Han和Qi( 1 999)所定义的例外簇的推广 ,并以此为基础 ,对张、韩和徐 ( 2 0 0 0 )的一般存在性定理给出一个新的证明 .  相似文献   

3.
给出Hilbert空间到其自身不具有关于锥的例外族的映射条件,利用Hilbert空间可表为闭凸锥与负对偶锥的特点研究映射关于锥的例外簇的特性,证明了可通过映射在某紧凸子集上的性态判断其例外簇的存在与否,并讨论单调和沿射线单调映射的不具例外簇问题。  相似文献   

4.
变分不等式问题的解的存在性   总被引:3,自引:0,他引:3       下载免费PDF全文
对一般凸集约束下的变分不等式问题提出了一个新的例外簇概念.基于此概念,给出了变分不等式问题解存在的一个充分条件,此条件弱于许多已知的关于变分不等式问题的解的存在性条件.对于伪单调变分不等式问题,它是解存在的充要条件.对于P0非线性互补问题,利用例外簇的概念,给出了其解存在的充分条件.  相似文献   

5.
研究下列半正Right F0cal边值问题单调正解的存在性其中λ>0是一个参数,n≥3,1相似文献   

6.
研究一类时滞与脉冲共存的微分方程三点边值问题,利用上下解与单调迭代方法获得了边值问题解的存在性定理和唯一性定理,给出求解该类问题解析近似解的迭代方法,得出了新的结论.  相似文献   

7.
曹登庆 《数学季刊》1991,6(4):81-85
本文应用相平面分析方法研究广泛一类二维非线性系统的周期解簇的存在性,所得结果包含了G.Villari和F.Zanolin的定理。  相似文献   

8.
在Banach空间中利用双线性连续泛函F代替内积引进了新的一类完全广义混合隐似平衡问题,引进了F强单调的概念,提出了该平衡问题的广义辅助问题,证明了广义辅助问题的收敛定理,给出了新的算法和由此算法产生的迭代序列的收敛特征.  相似文献   

9.
复合函数是高中数学中的一类重要函数 ,讨论复合函数的单调性 ,求出其单调区间是复合函数问题中的一类重要问题 .本文介绍一种求复合函数单调区间的简捷方法 ,供大家参考 .本文介绍的复合函数单调区间求法的理论依据是下面的定理 (判定定理 ) 若 y =F1(x) ,u1=F2 (x) ,… ,un=Fn 1(x)都是单调函数 ,则 n次复合函数 y =F1{ F2 [… Fn 1(x) ]}在其定义域内也是单调函数 ,且它为增函数的充要条件是 y =F1(x) ,u1=F2 (x) ,… ,un =Fn 1(x)中减函数的个数为偶数 ;它为减函数的充要条件是y =F1(x) ,u1=F2 (x) ,… ,un=Fn 1(x)中减函数的个数…  相似文献   

10.
集值变分不等式问题的例外簇   总被引:3,自引:0,他引:3  
范江华  赵康生 《数学学报》2007,50(1):183-188
本文首先在Banach空间中证明了零调集值映射的一个Leray-Schauder型不动点定理,然后在Hilbert空间中定义了零调集值映射的变分不等式的例外簇,利用本文给出的不动点定理给出了无界集上的变分不等式问题存在解的一个充分条件.此条件弱于许多已知的关于变分不等式问题的解的存在性条件,并由此得到Hilbert空间中几个变分不等式约解的存在性定理.  相似文献   

11.
In this paper, we propose a new notion of ‘exceptional family of elements’ for convex optimization problems. By employing the notion of ‘exceptional family of elements’, we establish some existence results for convex optimization problem in reflexive Banach spaces. We show that the nonexistence of an exceptional family of elements is a sufficient and necessary condition for the solvability of the optimization problem. Furthermore, we establish several equivalent conditions for the solvability of convex optimization problems. As applications, the notion of ‘exceptional family of elements’ for convex optimization problems is applied to the constrained optimization problem and convex quadratic programming problem and some existence results for solutions of these problems are obtained.  相似文献   

12.
In this paper, we introduce a new exceptional family for a variational inequality with a set-valued mapping over a general unbounded closed convex set in a Hilbert space. By means of the exceptional family and topological degree theory of set-valued mappings, an alternative theorem and some solution existence theorems are obtained.  相似文献   

13.
Existence theorems of solution to variational inequality problems   总被引:2,自引:0,他引:2  
This paper introduces a new concept of exceptional family for variational inequality problems with a general convex constrained set. By using this new concept, the authors establish a general sufficient condition for the existence of a solution to the problem. This condition is weaker than many known solution conditions and it is also necessary for pseudomonotone variational inequalities. Suffi-cient solution conditions for a class of nonlinear complementarity problems with Po mappings are also obtained.  相似文献   

14.
In this paper we establish several sufficient conditions for the existence of a solution to the linear and some classes of nonlinear complementarity problems. These conditions involve a notion of the ``exceptional family of elements' introduced by Smith [19] and Isac, Bulavski and Kalashnikov [4], where the authors have shown that the nonexistence of the ``exceptional family of elements' implies solvability of the complementarity problem. In particular, we establish several sufficient conditions for the nonexistence as well as for the existence of the exceptional family of elements.  相似文献   

15.
许可  范江华 《应用数学》2021,34(2):506-514
本文利用例外簇方法研究非强制混合向量变分不等式的弱有效解的存在性:首先证明若混合向量变分不等式问题不存在例外簇,则混合向量变分不等式问题的弱有效解集为非空集合:利用向量值映射的渐近映射给出自反Banach空间中非强制混合向量变分不等式的弱有效解集不存在例外簇的充分条件,从而得到混合向量变分不等式问题的弱有效解的存在性结果;我们研究了当算子为余正仿射算子时,给出混合仿射向量变分不等式不存在例外簇的充分条件,得到混合仿射向量变分不等式弱有效解的存在性,给出了混合仿射向量变分不等式的弱有效解集为非空紧致集的充分条件.将Iusem等人(2019)在有限维空间中标量混合变分不等式解的存在性结果推广到自反Banach空间中混合向量变分不等式.  相似文献   

16.
戚厚铎  韩继业 《计算数学》1997,19(2):170-176
1.简介给定一n×n阶矩阵M和一n维向量q,由M和q决定的线性互补问题是求得一向量x∈Rn使下式成立:问题(1)简记为LCP(q;M).[1]对此问题作了详细的介绍,其中一个重要专题是研究(1)的解存在性问题:在何种条件下,LCv(q,wr)有解.山给出了各种存在性定理如:当wr是正定矩阵时,对任一qeR”,LCP(q,M)都有唯一解,这一结果被推广到P一矩阵,当M为(严格)半单调矩阵及q(三)>0时,LCP(q,M)只有零解;当M为协正定阵时,q限制于某一集合时,LCP(q,M)有解等.所有上述结果都源于线性互补问题的二次等价形式及…  相似文献   

17.
This paper is the second part of our recent work [Isac and Németh, J Optim Theory Appl (forthcoming)]. Our goal is now to present some new results related to the non-existence of a regular exceptional family of elements (REFE) for a mapping and to show how can they be applied to complementarity theory.  相似文献   

18.
By employing the notion of exceptional family of elements, we establish some existence results for generalized variational inequality problems in reflexive Banach spaces provided that the mapping is upper sign-continuous. We show that the nonexistence of an exceptional family of elements is a necessary condition for the solvability of the dual variational inequality. For quasimonotone variational inequalities, we present some sufficient conditions for the existence of strong solutions. For the pseudomonotone case, the nonexistence of an exceptional family of elements is proved to be an equivalent characterization of the problem having strong solutions. Furthermore, we establish several equivalent conditions for the solvability for the pseudomonotone case. As a byproduct, a quasimonotone generalized variational inequality is proved to have a strong solution if it is strictly feasible. Moreover, for the pseudomonotone case, the strong solution set is nonempty and bounded if it is strictly feasible.  相似文献   

19.

By employing the notion of exceptional family of elements, we establish existence results for the mixed tensor variational inequalities. We show that the nonexistence of an exceptional family of elements is a sufficient condition for the solvability of mixed tensor variational inequality. For positive semidefinite mixed tensor variational inequalities, the nonexistence of an exceptional family of elements is proved to be an equivalent characterization of the nonemptiness of the solution sets. We derive several sufficient conditions of the nonemptiness and compactness of the solution sets for the mixed tensor variational inequalities with some special structured tensors. Finally, we show that the mixed tensor variational inequalities can be defined as a class of convex optimization problems.

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