Reflection length in non-affine Coxeter groups

Details Reflection length in non-affine Coxeter groups Reflection length in non-affine Coxeter groups

2011-06-03

arxiv.org/abs/1106.0619v1

Mathematics

Group Theory

Scientific paper

The reflection length of an element of a Coxeter group is the minimal number of conjugates of the standard generators whose product is equal to that element. In this paper we prove the conjecture of McCammond and Petersen that reflection length is unbounded in any non-affine Coxeter group. Among the tools used, the construction of word-hyperbolic quotients of all minimal non-affine Coxeter groups might be of independent interest.

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