On uniformly convex subsets of Banach spaces
首发时间:2012-02-08
Abstract:This paper introduces a notion ofuniform convex sets in Banach spaces, which is a localized settingof uniformly convex Banach spaces, and shows that every uniformlyconvex set has many nice properties, such as, every boundeduniformly convex set is weakly compact and admits the Radon-Rieszproperty. It also presents that the metric projection to everynonempty uniformly convex set is always continuous, every convexsubset in a uniformly convex space is uniformly convex and everycompact convex subset in a strictly convex space is also uniformlyconvex.
keywords: Banach space uniformly convex space Radon-Riesz property
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Banach空间的一致凸子集
摘要:本文在Banach空间中引入了一致凸集的概念,其可视作一致凸Banach空间的局部化概念,证明了每个一致凸集具有许多良好的性质,例如,每个有界一致凸集为弱紧的;具有Radon-Riesz性质. 也证明了到每个一致凸集的度量投影为连续的,一致凸空间的每个凸集以及严格凸空间的每个紧凸集为一致凸集.
关键词: Banach空间 一致凸空间 Radon-Riesz性质
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