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本文研究一类不可微函数Chaney意义下的二阶广义方向导数,并得到这一类不可微问题的二阶最优性条件。 相似文献
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本文对拟可微函数定义了凸化核的概念,并对其具体结构做了进一步的研究, 给出了一般拟可微函数为次可微的一个充分条件. 相似文献
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本文主要在 Orlicz 空间中给出一类较广泛的型非线性映象可微性的充分条件,进而得到有关歧点方面的相应结果。 相似文献
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可微广义凸规划的最优充要条件 总被引:4,自引:0,他引:4
利用Bector定义的广义凸函数——univex函数,讨论可微广义凸规划和可微多目标广义凸规划的Kuhn-Tucker最优充要条件。 相似文献
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本文讨论了一类非光滑凸规划问题,给出了Lagrange乘子的存在性与值函数的次可微性的关系和乘子存在的充分条件。 相似文献
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本文给出了拟可微优化的Fritz John必须条件与Shapiro最优性必要条件的等价性质以及两个最优性充分条件. 相似文献
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应用新方法,研究十二类广义凸函数相关集合的稠密性问题.证明了其中的八个集合在[0,1]中是稠密的.应用反例说明了其中的四个集合在[0,1]中不必稠密. 相似文献
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Banach空间中一类扰动优化问题最优解的特征与存在性 总被引:2,自引:0,他引:2
设(X,‖·‖)是Banach空间,x∈X,Z是X的非空子集,J是Z→R的下半连续下有界函数.本文研究扰动优化问题min_(z∈Z)(J(z)+‖x-z‖)(记作(J,x)-inf)的最优解的特征和最优解的存在性等问题.我们引入J-太阳集的概念,同时在Z是J-太阳集的情形下,给出了扰动优化问题(J,x)-inf的最优解的“Kolmogorov”型特征刻画.并借助于集合的若干紧性概念和最优值函数的方向导数研究了扰动优化问题(J,x)-inf的最优解的存在性. 相似文献
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本文研究了一类带不等式约束的多目标优化问题,给出了该类问题的有效解的一些充分必要条件,在适当条件下利用线性标量化方法证明了其有效解和真有效解的等价性。本文的主要结论是对最近一些文献中相应结果的改进与推广。 相似文献
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将不可压缩的广义neo-Hookean材料组成的超弹性圆柱壳径向对称运动的数学模型归结为一类非线性发展方程组的初边值问题.利用材料的不可压缩条件和边界条件求得了描述圆柱壳内表面径向运动的二阶非线性常微分方程.给出了微分方程的周期解(即圆柱壳的内表面产生非线性周期振动)的存在条件,讨论了材料参数和结构参数对方程的周期解的影响,并给出了相应的数值模拟. 相似文献
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Characterizations of the Nonemptiness and Compactness of Solution Sets in Convex Vector Optimization
S. Deng 《Journal of Optimization Theory and Applications》1998,96(1):123-131
In this paper, various necessary and sufficient conditions are given for the nonemptiness and compactness of the weakly efficient solution set of a convex vector optimization problem. 相似文献
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We consider quasidifferentiable functions in the sense of Demyanov and Rubinov, i. e. functions, which are directionally differentiable and whose directional derivative can be expressed as a difference of two sublinear functions, so that its subdifferential, called the quasidifferential, consists of a pair of sets. For these functions a generalized gradient algorithm is proposed. Its behaviour is studied in detail for the special class of continuously subdifferentiable functions. Numerical test results are given. Finally, the general quasidifferentiable case is simulated by means of perturbed subdifferentials, where we make use of the non-uniqueness in the quasidifferential representation. 相似文献
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Let (P) denote the vector maximization problem
where the objective functions f
i
are strictly quasiconcave and continuous on the feasible domain D, which is a closed and convex subset of R
n
. We prove that if the efficient solution set E(P) of (P) is closed, disconnected, and it has finitely many (connected) components, then all the components are unbounded. A similar fact is also valid for the weakly efficient solution set E
w
(P) of (P). Especially, if f
i
(i=1,...,m) are linear fractional functions and D is a polyhedral convex set, then each component of E
w
(P) must be unbounded whenever E
w
(P) is disconnected. From the results and a result of Choo and Atkins [J. Optim. Theory Appl. 36, 203–220 (1982.)] it follows that the number of components in the efficient solution set of a bicriteria linear fractional vector optimization problem cannot exceed the number of unbounded pseudo-faces of D. 相似文献
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Farzad Didehvar 《Mathematical Logic Quarterly》1999,45(4):467-470
We define a class of so-called ∑(n)-sets as a natural closure of recursively enumerable sets Wn under the relation “∈” and study its properties. 相似文献