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Article . 1997 . Peer-reviewed
License: Springer 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
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Article . 1997
Data sources: zbMATH Open
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Compactness properties of locally compact groups

Authors: Abels, Herbert; Tiemeyer, A.;

Compactness properties of locally compact groups

Abstract

For a discrete group \(\Gamma\) and an integer \(n\), finiteness properties \(FP_n\) and \(F_n\) are considered. They are defined as follows: \(\Gamma\) is of type \(FP_n\) if there is a projective resolution of \(\mathbb{Z} \Gamma\) over the trivial \(\mathbb{Z} \Gamma\)-module \(\mathbb{Z}\) with finitely generated modules in dimension \(\leq n\). \(\Gamma\) is of type \(F_n\) if there is an Eilenberg-MacLane space \(K (\Gamma,1)\) with finite \(n\)-skeleton. In the paper under review, the authors introduce, as a generalization, compactness properties \(CP_n\) and \(C_n\) for a locally compact group \(G\). They show that, as in the discrete case, \(C_1\) is equivalent to compact generation and \(C_2\) is equivalent to compact presentability. Moreover, it is proved that the compactness properties are preserved by some operations as passing to a cocompact subgroup or to the quotient by a compact normal subgroup.

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Keywords

General properties and structure of locally compact groups, compact generation, compactness, locally compact group, compact presentability, Eilenberg-Mac Lane spaces, Eilenberg-MacLane space

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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!
7
Average
Average
Average
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