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zbMATH Open
Article . 2024
Data sources: zbMATH Open
https://dx.doi.org/10.48550/ar...
Article . 2024
License: CC BY
Data sources: Datacite
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Non-uniformly continuous nearest point maps

Authors: Medina Sabino, Rubén; Quilis, Andrés;

Non-uniformly continuous nearest point maps

Abstract

We construct a Banach space satisfying that the nearest point map (also called proximity mapping or metric projection) onto any non-singleton compact and convex subset is continuous but not uniformly continuous. The space we construct is locally uniformly convex, which ensures the continuity of all these nearest point maps. Moreover, we prove that every infinite-dimensional separable Banach space is arbitrarily close (in the Banach-Mazur distance) to one satisfying the above conditions.

Country
Spain
Keywords

Lipschitz and coarse geometry of metric spaces, proximity mappings, Metric Geometry (math.MG), locally uniformly convex norms, nearest point maps, Retraction, Functional Analysis (math.FA), compact convex sets, Mathematics - Functional Analysis, Banach spaces, Geometry and structure of normed linear spaces, retractions, Mathematics - Metric Geometry, Nonlinear classification of Banach spaces; nonlinear quotients, FOS: Mathematics, metric projections, 46B20, 46B80, 51F30, 54C15

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
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