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2 questions
4
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Algorithm for root system of Coxeter group generated by permutations
Suppose we are given a group $G$ in terms of generators $t_1, ..., t_n$ which are order 2 in $S_m$ (however we don't assume anything other than that these elements generate $G$ and have order 2). What ...
4
votes
1
answer
398
views
Torsion-free, normal subgroups of certain Coxeter groups
Let $G$ be the reflection group of a regular, 4-dimensional, hyperbolic honeycomb. I would like to find a family $H_i < G$ of finite-index, torsion-free subgroups of $G$, so that I can represent ...