Chebyshev centers that are not farthest points
Fuente:
arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2016
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| _version_ | 1866910544922935296 |
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| author | Sain, Debmalya Kadets, Vladimir Paul, Kallol Ray, Anubhab |
| author_facet | Sain, Debmalya Kadets, Vladimir Paul, Kallol Ray, Anubhab |
| contents | In this paper we address the question whether in a given Banach space, a Chebyshev center of a nonempty bounded subset can be a farthest point of the set. Our exploration reveals that the answer depends on the convexity properties of the Banach space. We obtain a characterization of two-dimensional real strictly convex spaces in terms of Chebyshev center not contributing to the set of farthest points. We explore the scenario in uniformly convex Banach spaces and further study the roles played by centerability and M-compactness in the scheme of things to obtain a step by step characterization of strictly convex Banach spaces. We also illustrate with examples the optimality of our results. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1608_03422 |
| institution | arXiv |
| publishDate | 2016 |
| record_format | arxiv |
| spellingShingle | Chebyshev centers that are not farthest points Sain, Debmalya Kadets, Vladimir Paul, Kallol Ray, Anubhab Functional Analysis In this paper we address the question whether in a given Banach space, a Chebyshev center of a nonempty bounded subset can be a farthest point of the set. Our exploration reveals that the answer depends on the convexity properties of the Banach space. We obtain a characterization of two-dimensional real strictly convex spaces in terms of Chebyshev center not contributing to the set of farthest points. We explore the scenario in uniformly convex Banach spaces and further study the roles played by centerability and M-compactness in the scheme of things to obtain a step by step characterization of strictly convex Banach spaces. We also illustrate with examples the optimality of our results. |
| title | Chebyshev centers that are not farthest points |
| topic | Functional Analysis |
| url | https://arxiv.org/abs/1608.03422 |