> < ^ Date: Wed, 23 Jun 1993 11:52:29 +0200 (METDST)
^ From: Andrzej Szczepanski <aszczepa@umpa.ens-lyon.fr >
^ Subject: coxeter

Dear gap-forum,

Gerhard Hiss informed me that you can help me in the following problem:

How find the torsion free subgroup of finite index in the Coxeter

group ?

I have several examples of Coxeter groups for which I want to find 

a torsion free subgroup of finite index.The simplest is:
   4    4            infinity
. -- . -- . -- . -- . -- .

The Coxeter diagram ( linear) with 6 vertex and 5 edges.

The first two edges have "balanced" number 4 and the last edge has

number "infinity".

Thank you in advance.Sincerely Yours.Andrzej Szczepanski.

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