René Hartung
Published 2011-08-11Version 1
We prove a variant of the well-known Reidemeister-Schreier theorem for finitely $L$-presented groups. More precisely, we prove that each finite index subgroup of a finitely $L$-presented group is itself finitely $L$-presented. Our proof is constructive and it yields a finite $L$-presentation for the subgroup. We further study conditions on a finite index subgroup of an invariantly finitely $L$-presented group to be invariantly $L$-presented itself.
Generating pairs for finite index subgroups of sl(n, z)
A presentation for Aut(F_n)
On expansions of non-abelian free groups by cosets of a finite index subgroup
![QR code for arXiv:1108.2403 [math.GR]](http://oss.arxitics.com/images/favicon.svg)