Obituary
发表于 2025-3-25 05:32:27
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熔岩
发表于 2025-3-25 08:32:58
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MULTI
发表于 2025-3-25 15:15:49
The Jung Constant,The Jung constant appears in many problems in various fields of mathematics. In the present chapter, we will give examples of such problems and present the available exact values of the Jung constant for several classical spaces.
metropolitan
发表于 2025-3-25 18:31:54
978-3-030-90953-6The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerl
Impugn
发表于 2025-3-25 23:20:11
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Feedback
发表于 2025-3-26 00:20:51
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browbeat
发表于 2025-3-26 05:28:33
https://doi.org/10.1007/978-981-19-4097-2owing fact important for applications: in corresponding spaces, a nonconvex set cannot be a Chebyshev set. As a corollary, at some point either the existence or the uniqueness property is not satisfied. Results of this kind can be useful in solving extremal problems.
婴儿
发表于 2025-3-26 11:38:30
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斑驳
发表于 2025-3-26 15:10:39
Ulrike Tikvah Kissmann,Joost‘van Loonr to show that a Chebyshev set is convex, it suffices to prove its ‘solarity’ (in some sense or other) and then employ Theorem . on the convexity of suns in smooth spaces (of course if the corresponding space is smooth).
赔偿
发表于 2025-3-26 18:43:50
https://doi.org/10.1007/978-1-4842-3267-5al-valued functions, approximation by Chebyshev subspaces was found to be closely related to various problems in interpolation, uniqueness, and the number of zeros in nontrivial polynomials (the generalized Haar property). For vector-valued functions, the relation between such properties turned out to be less simple.