Restriction to finite-index subgroups as étale extensions in topology, KK–theory and geometry

Paul Balmer; Ivo  Dell’Ambrogio; Beren Sanders

doi:10.2140/agt.2015.15.3025

Restriction to finite-index subgroups as étale extensions in topology, KK–theory and geometry

Paul Balmer, Ivo Dell’Ambrogio, Beren Sanders

Institut for Matematiske Fag

9 Citationer (Scopus)

Abstract

For equivariant stable homotopy theory, equivariant KK–theory and equivariant derived categories, we show how restriction to a subgroup of finite index yields a finite commutative separable extension, analogous to finite étale extensions in algebraic geometry.

Originalsprog	Engelsk
Tidsskrift	Algebraic & Geometric Topology
Vol/bind	15
Udgave nummer	5
Sider (fra-til)	3025–3047
ISSN	1472-2747
DOI	https://doi.org/10.2140/agt.2015.15.3025
Status	Udgivet - 12 nov. 2015

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10.2140/agt.2015.15.3025

agt-v15-n5-p17-s.pdfForlagets udgivne version, 409 KB

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Restriction to finite-index subgroups as étale extensions in topology, KK–theory and geometry

Abstract

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