Subgroups approximatively of finite index and wreath products.
type: Item
instance of: scholarly article
title: Subgroups approximatively of finite index and wreath products.
zbMATH Open document ID: 1336.20031
DOI: 10.4171/GGD/247
published in: Groups, Geometry, and Dynamics
publication date: 2014-11-21T00:00:00Z
review text: Summary: In a group, we introduce a notion of subgroup approximatively of finite index, which extends the notion of groups approximable by finite groups. We deduce a characterization of (restricted, permutational) wreath products that are approximable by finite groups.
Mathematics Subject Classification ID: 20E07
Mathematics Subject Classification ID: 20E22
Mathematics Subject Classification ID: 20E26
Mathematics Subject Classification ID: 20E15
zbMATH DE Number: 6371841
zbMATH Keywords: Chabauty topology
zbMATH Keywords: profinite topology
zbMATH Keywords: spaces of subgroups
zbMATH Keywords: wreath products
zbMATH Keywords: subgroups approximatively of finite index
zbMATH Keywords: limits of sequences of subgroups of finite index
author: Yves Cornulier
MaRDI profile type: Publication
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full work available at URL: https://doi.org/10.4171/ggd/247
OpenAlex ID: W2006336530
description: scientific article; zbMATH DE number 6371841