English

An asymptotic cell category for cyclic groups

Representation Theory 2019-10-28 v3

Abstract

In his theory of unipotent characters of finite groups of Lie type, Lusztig constructed modular categories from two-sided cells in Weyl groups. Brou\'e,Malle and Michel have extended parts of Lusztig's theory to complex reflection groups. This includes generalizations of the corresponding fusion algebras, although the presence of negative structure constants prevents them from arising from modular categories. We give here the first construction of braided pivotal monoidal categories associated with non-real reflection groups (later reinterpreted by Lacabanne as super modular categories). They are associated with cyclic groups, and their fusion algebras are those constructed by Malle.

Keywords

Cite

@article{arxiv.1708.09730,
  title  = {An asymptotic cell category for cyclic groups},
  author = {Cédric Bonnafé and Raphaël Rouquier},
  journal= {arXiv preprint arXiv:1708.09730},
  year   = {2019}
}

Comments

26 pages

R2 v1 2026-06-22T21:29:14.130Z