^ From:

^ Subject:

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.

> < [top]