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arXiv 1004.3792math.FA
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凸$μ$ -紧集的刻画

Characterization of convex $μ$-compact sets

M. E. Shirokov

摘要:

$μ$ -紧集类可以看作是局部凸空间的紧可度量化子集类的自然扩张,紧集类的一些特殊结果可以推广到它.这个类包含了所有的紧集以及许多在应用中广泛使用的非紧集。本文利用定义在凸$μ$ -紧集上的函数的性质,给出了凸$μ$ -紧集的一个刻画.即证明了凸$μ$ -紧集类可以用函数的凸闭包运算(即双Fenchel变换)关于连续有界函数和下连续下有界函数的单调逐点收敛序列的连续性来刻画.

英文摘要:

The class of $μ$-compact sets can be considered as a natural extension of the class of compact metrizable subsets of locally convex spaces, to which the particular results well known for compact sets can be generalized. This class contains all compact sets as well as many noncompact sets widely used in applications. In this paper we give a characterization of a convex $μ$-compact set in terms of properties of functions defined on this set. Namely, we prove that the class of convex $μ$-compact sets can be characterized by continuity of the operation of convex closure of a function (= the double Fenchel transform) with respect to monotonic pointwise converging sequences of continuous bounded and of lower semicontinuous lower bounded functions.

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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