Abstract
Let be a bounded closed convex set in a Banach space. The boundaries of the wide spherical hull and the tight spherical hull are characterized, the existence of diametral points of these three sets are discussed, and a further relation between these three sets is clarified. Moreover, a new characterization of balls is presented.
Citation
Chan He. Senlin Wu. Xinling Zhang. "Wide and tight spherical hulls of bounded sets in Banach spaces." Ann. Funct. Anal. 7 (2) 290 - 302, May 2016. https://doi.org/10.1215/20088752-3505890
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