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Mathematical Notes
Article . 1992 . Peer-reviewed
License: Springer Nature TDM
Data sources: Crossref
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
zbMATH Open
Article . 1992
Data sources: zbMATH Open
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Whitney maps for spaces of embedding hypersurfaces

Authors: Radul, T. N.;

Whitney maps for spaces of embedding hypersurfaces

Abstract

Let \(X\) be a metrizable compactum. The space \(\text{exp} X = \{A \subset X\) is nonempty and compact\} with Hausdorff metric is said to be the hyperspace \(\text{exp} X\) of a space \(X\) with metric \(\rho\). A closed subspace \({\mathcal A}\) of \(\text{exp} X\) is called an embedding hyperspace if for every \(A \in \text{exp} X\) such that \(A \supset B\) for some \(B \in {\mathcal A}\) we have \(A \in {\mathcal A}\). \(GX\), the space of all embedding hyperspaces is considered as a subspace of \(\text{exp}^ 2 X\) with the induced metric. A continuous function \(\omega:GX \to R\) that satisfies the following conditions is called a Whitney map for the space of embedding hyperspaces: 1) \(\omega [X] = \{0\}\); 2) if \({\mathcal A}, {\mathcal B} \in GX\) and \({\mathcal A} \subset {\mathcal B} \neq {\mathcal A}\), then \(\omega ({\mathcal A}) < \omega ({\mathcal B})\). It is proved that Whitney maps exist. Theorem 1. Let \(X\) be a metrizable continuum. If \(\omega:GX \to [1;1]\) is a Whitney map, \(\omega/ \omega^{-1}(1,1)\) is a trivial fibering with its own Hilbert cube.

Related Organizations
Keywords

metrizable continuum, Continua and generalizations, metrizable compacta, Whitney map, metrizable compactum, embedding hyperspace, Hyperspaces in general topology, Hilbert cube, Compact (locally compact) metric spaces

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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
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