Subgroups approximatively of finite index and wreath products
Yves Cornulier
Université Paris-Sud, Orsay, France
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Abstract
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.
Cite this article
Yves Cornulier, Subgroups approximatively of finite index and wreath products. Groups Geom. Dyn. 8 (2014), no. 3, pp. 775–788
DOI 10.4171/GGD/247