共查询到20条相似文献,搜索用时 93 毫秒
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讨论了一类具集值映射的广义强向量拟均衡问题(GSVQEP)解的存在性.利用连续选择定理和不动点定理,在没有任何单调性假设下得到了GSVQEP解的存在性定理. 相似文献
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《数学的实践与认识》2016,(23)
利用集值映射的自然拟C-凸性和集值映射的下(-C)-连续性的定义以及Kakutani-Fan-Glicksberg不动点定理,在不要求锥C的对偶锥C~*具有弱*紧基的情况下,建立了集值广义强向量拟均衡问题解的存在性定理.把相关文献中所得的关于单值映射解的存在性结果推广到了集值映射的情形. 相似文献
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本文在K条件下,研究了所给标量泛函的连续性和拟凸性,并利用该标量泛函,将集值优化问题转化为均衡问题,进而研究了含约束的集值优化问题弱充分解的存在性和拟集值优化问题强逼近解映射的上半连续性与下半连续性.与最近的文献相比,我们的方法是新的,条件和结论也更具一般性. 相似文献
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研究拓扑向量空间上弱广义向量拟似变分不等式解的存在性问题.与Khaliq和Rashid等在单调或伪单调假设条件下,利用KKM定理证明解的存在性不同,在集值映射是非空凸值映射并且有开下截口的条件下,利用Fan-Browder不动点原理证明解的存在性. 相似文献
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该文研究了一类具广义单调型集值映象的变分不等式解的存在性问题,结果包含文献[1,8,9]中的相应结果为特例. 相似文献
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锥拟凸集值映射多目标优化的解集的连通性 总被引:1,自引:0,他引:1
在一般拓扑向量空间中,本文引进了一类锥进凸(锥严格拟凸)集值映射。并在目标映射是锥拟凸(锥严格拟凸)和上半连续的条件下,利用Minkowski泛函,证明了弱有效解(有效解)集是连通的。文[9]中的结论是本文所得结果大目标映射为单值和拓扑空间为格的情况下的特例。 相似文献
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在局部FC-一致空间内,引入和研究了某些新的涉及凝聚集值映象的广义矢量拟平衡问题组.应用作者在文(Ⅰ)中对局部FC-一致空间内的凝聚集值映象得到的极大元存在性定理,在局部FC-一致空间内,对这些广义矢量拟平衡问题组的解,证明了某些新的存在性定理.这些结果改进和推广了文献中某些已知结果到局部FC-一致空间. 相似文献
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By combining the simplified shooting method with a sandwich method, the existence and nonexistence of two types of traveling wave solutions for a class of diffusive predator–prey systems with general functional response are investigated. These two types of point-to-point traveling waves include the connections of the zero equilibrium to the positive equilibrium and the boundary equilibrium to the positive equilibrium. Furthermore, we also give a discussion about the parameter threshold value whether any of the traveling waves approaches the positive equilibrium monotonically or has exponentially damped oscillations about the positive equilibrium. Some applications with different functional response functions are given to illustrate the application of our results. 相似文献
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We study a diffusive predator–prey model with modified Leslie–Gower and Holling-II schemes with \(D=0\). We establish the existence of traveling wave solutions connecting a positive equilibrium and a boundary equilibrium via the ‘shooting method’, and the non-existence by the ‘eigenvalue method’. It should be emphasized that a threshold value \(c^*=\sqrt{4\alpha }\) is found in our paper. 相似文献
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Rabah Amir 《Annals of Operations Research》2002,114(1-4):39-56
We consider discounted stochastic games characterized by monotonicity, supermodularity and diagonal dominance assumptions on the reward functions and the transition law. A thorough novel discussion of the scope and limitations of this class of games is provided. Existence of a Markov-stationary equilibrium for the infinite-horizon game, proved by Curtat (1996), is summarized. Uniqueness of Markov equilibrium and dominance solvability of the finite-horizon game are established. In both cases, the equilibrium strategies and the corresponding value functions are nondecreasing Liptschitz-continuous functions of the state vector. Some specific economic applications are discussed. 相似文献
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This paper proposes an iterative method for solving strongly monotone equilibrium problems by using gap functions combined
with double projection-type mappings. Global convergence of the proposed algorithm is proved and its complexity is estimated.
This algorithm is then coupled with the proximal point method to generate a new algorithm for solving monotone equilibrium
problems. A class of linear equilibrium problems is investigated and numerical examples are implemented to verify our algorithms. 相似文献
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Combined Relaxation Method for Mixed Equilibrium Problems 总被引:1,自引:0,他引:1
I. V. Konnov S. Schaible J. C. Yao 《Journal of Optimization Theory and Applications》2005,126(2):309-322
We consider a general class of equilibrium problems which involve a single-valued mapping and a nonsmooth bifunction. Such mixed equilibrium problems are solved with a combined relaxation method using an auxiliary iteration of a splitting-type method for constructing a separating hyperplane. We prove the convergence of the method under the assumption that the dual of the mixed equilibrium problem is solvable. Convergence rates are also derived.S. Schaible - This author gratefully acknowledges partial support from the National Science Council of Taiwan.J.C. Yao - His research was partially supported by Grant NSC 93-2115-M-110-011 相似文献
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运用频域法研究了一类具有时滞的单模激光系统,选择时滞τ作为参数,当τ通过某个临界值时,Hopf分支产生,即从平衡点处分支出一簇周期解,最后,利用数值模拟证实理论分析结果的正确性. 相似文献
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Manjira Datta Leonard J. Mirman Olivier F. Morand Kevin L. Reffett 《Annals of Operations Research》2002,114(1-4):117-144
In this paper, we provide an overview of an emerging class of monotone map methods in analyzing distorted equilibrium in dynamic economies. In particular, we focus on proving the existence and characterization of competitive equilibrium in non-optimal versions of the optimal growth models. We suggest two alternative methods: an Euler equation method for a smooth, strongly concave environment, and a value function method for a non-smooth supermodular environment. We are able to extend this analysis to study models that allow for unbounded growth or a labor–leisure choice. 相似文献
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Alex Pothen 《Numerische Mathematik》1989,55(5):501-519
Summary We study the computation of sparse null bases of equilibrium matrices in the context of the force method in structural optimization. Two classes of structural problems are considered. For the class of rigid jointed skeletal structures, we use a partitioning method suggested by Henderson and Maunder to partition the problem into a set of independent null basis computations. For the class of structures represented by a continuum, we compute a sizable fraction of the null vectors in a basis from a consideration of the finite element formulation and the bipartite graph of the equilibrium matrix. The remaining null vectors are computed by the triangular algorithm in [6]. The new algorithms find sparser bases than the triangular algorithm and are also faster.This research was partially supported by NSF grant CCR-8701723 and AFOSR grant 88-0161 相似文献
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针对均衡约束数学规划模型难以满足约束规范及难于求解的问题,基于Mond和Weir提出的标准非线性规划的对偶形式,利用其S稳定性,建立了均衡约束数学规划问题的一类广义Mond-Weir型对偶,从而为求解均衡约束优化问题提供了一种新的方法.在Hanson-Mond广义凸性条件下,利用次线性函数,分别提出了弱对偶性、强对偶性和严格逆对偶性定理,并给出了相应证明.该对偶化方法的推广为研究均衡约束数学规划问题的解提供了理论依据. 相似文献
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Jean Jacques Strodiot Thi Thu Van Nguyen Van Hien Nguyen 《Journal of Global Optimization》2013,56(2):373-397
Generalized Nash equilibrium problems are important examples of quasi-equilibrium problems. The aim of this paper is to study a general class of algorithms for solving such problems. The method is a hybrid extragradient method whose second step consists in finding a descent direction for the distance function to the solution set. This is done thanks to a linesearch. Two descent directions are studied and for each one several steplengths are proposed to obtain the next iterate. A general convergence theorem applicable to each algorithm of the class is presented. It is obtained under weak assumptions: the pseudomonotonicity of the equilibrium function and the continuity of the multivalued mapping defining the constraint set of the quasi-equilibrium problem. Finally some preliminary numerical results are displayed to show the behavior of each algorithm of the class on generalized Nash equilibrium problems. 相似文献