Volume 14, issue 1 (2014)

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ISSN (electronic): 1472-2739
ISSN (print): 1472-2747
A weak Zassenhaus Lemma for discrete subgroups of $\operatorname{Diff}(I)$

Azer Akhmedov

Algebraic & Geometric Topology 14 (2014) 539–550
Abstract

We prove a weaker version of the Zassenhaus Lemma for subgroups of Diff(I). We also show that a group with commutator subgroup containing a non-Abelian free subsemigroup does not admit a C0–discrete faithful representation in Diff(I).

Keywords
diffeomorphism group of the interval, Zassenhaus Lemma, discrete subgroups of $\operatorname{Diff}(I)$
Mathematical Subject Classification 2010
Primary: 37C05
Secondary: 20F65
References
Publication
Received: 28 November 2012
Revised: 13 August 2013
Accepted: 15 August 2013
Published: 9 January 2014
Authors
Azer Akhmedov
Mathematics Department
North Dakota State University
Fargo, ND 58102
USA