English

Presentations of the braid group of the complex reflection group $G(d,d,n)$

Representation Theory 2024-12-18 v1 Algebraic Topology Combinatorics Group Theory Geometric Topology

Abstract

We show that the braid group associated to the complex reflection group G(d,d,n)G(d,d,n) is an index dd subgroup of the braid group of the orbifold quotient of the complex numbers by a cyclic group of order dd. We also give a compatible presentation of G(d,d,n)G(d,d,n) and its braid group for each tagged triangulation of the disk with nn marked points on its boundary and an interior marked point (interpreted as a cone point of degree dd) in such a way that the presentations of Brou\'{e}-Malle-Rouquier correspond to a special tagged triangulation.

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Cite

@article{arxiv.2412.12802,
  title  = {Presentations of the braid group of the complex reflection group $G(d,d,n)$},
  author = {Francesca Fedele and Bethany Rose Marsh},
  journal= {arXiv preprint arXiv:2412.12802},
  year   = {2024}
}

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50 pages