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arXiv 1401.6322math.OC
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一类具有凸象的凸集及其对非凸optimization的应用

On a class of convex sets with convex images and its application to nonconvex optimization

Amos Uderzo

摘要:

本文建立了巴拿赫空间之间一致凸集通过$C^{1,1}$正则映射的象保持凸的条件。这些条件用给定集合的凸性模与其上映射的整体正则性之间的某种定量关系来表示,这样的结果使人们能够把Polyak的凸性原理推广到凸集的一个更广的子类中,而Polyak的凸性原理最初是与希尔伯特空间中点周围的小球象有关的。特别是,定期$C^{1,1}$变换下的凸性的保护的关键现象示出包括类的$r$ -凸集,其中的值$r$取决于所涉及的变换的规律性行为。讨论了与非凸优化有关的两个结果:第一个是无穷维约束极值问题全局解存在的充分条件;第二个是非线性数学规划最优性的零阶Lagrange型刻画.

英文摘要:

In the present paper, conditions under which the images of uniformly convex sets through $C^{1,1}$ regular mappings between Banach spaces remain convex are established. These conditions are expressed by a certain quantitative relation betweeen the modulus of convexity of a given set and the global regularity behaviour of the mapping on it. Such a result enables one to extend to a wide subclass of convex sets the Polyak's convexity principle, which was originally concerned with images of small balls around points of Hilbert spaces. In particular, the crucial phenomenon of the preservation of convexity under regular $C^{1,1}$ transformations is shown to include the class of $r$-convex sets, where the value of $r$ depends on the regularity behaviour of the involved transformation. Two consequences related to nonconvex optimization are discussed: the first one is a sufficient condition for the global solution existence for infinite-dimensional constrained extremum problems; the second one provides a zero-order Lagrangian type characterization of optimality in nonlinear mathematical programming.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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