Computing reflection length in an affine Coxeter group
Combinatorics
2020-03-02 v1 Group Theory
Abstract
In any Coxeter group, the conjugates of elements in its Coxeter generating set are called reflections and the reflection length of an element is its length with respect to this expanded generating set. In this article we give a simple formula that computes the reflection length of any element in any affine Coxeter group and we provide a simple uniform proof.
Keywords
Cite
@article{arxiv.1710.06920,
title = {Computing reflection length in an affine Coxeter group},
author = {Joel Brewster Lewis and Jon McCammond and T. Kyle Petersen and Petra Schwer},
journal= {arXiv preprint arXiv:1710.06920},
year = {2020}
}
Comments
39 pages, 11 figures