English

The Brauer indecomposability of Scott modules with wreathed $2$-group vertices

Representation Theory 2022-01-05 v1 Group Theory

Abstract

We give a sufficient condition for the kGkG-Scott module with vertex PP to remain indecomposable under taking the Brauer construction for any subgroup QQ of PP as k[QCG(Q)]k[Q\,C_G(Q)]-module, where kk is a field of characteristic 22, and PP is a wreathed 22-subgroup of a finite group GG. This generalizes results for the cases where PP is abelian and some others. The motivation of this paper is that the Brauer indecomposability of a pp-permutation bimodule (pp is a prime) is one of the key steps in order to obtain a splendid stable equivalence of Morita type by making use of the gluing method that then can possibly lift to a splendid derived equivalence.

Keywords

Cite

@article{arxiv.2012.08229,
  title  = {The Brauer indecomposability of Scott modules with wreathed $2$-group vertices},
  author = {Shigeo Koshitani and İpek Tuvay},
  journal= {arXiv preprint arXiv:2012.08229},
  year   = {2022}
}