Groups of $\mathrm{I}_G$-type
Abstract
In this work, we address a question posed by Dehornoy et al. in the book "Foundations of Garside Theory" that asks for a theory of groups of -type when is a Garside group. In this article, we introduce a broader notion than the one suggested by Dehornoy et al.: given a left-ordered group , we define a group of -type as a left-ordered group whose partial order is isomorphic to those of . Furthermore, we develop methods to give a characterization of groups of -type in terms of skew braces when is an Artin-Tits group of spherical type and classify all groups of -type where is an irreducible spherical Artin-Tits group, therefore providing an answer to another question of Dehornoy et al. concerning structures where is the braid group on strands with its canonical Garside structure.
Cite
@article{arxiv.2505.13347,
title = {Groups of $\mathrm{I}_G$-type},
author = {Carsten Dietzel},
journal= {arXiv preprint arXiv:2505.13347},
year = {2025}
}
Comments
12 Pages, Comments Welcome! Changes in Version 2: Added reference for Prop. 1.8., simplified proof of Prop. 2.3, slight changes in the definition of an I_G-formation