English

Lifting Brauer indecomposability of a Scott module

Representation Theory 2025-12-09 v3 Group Theory

Abstract

It is proven that if a finite group GG has a normal subgroup HH with pp'-index (where pp is a prime) and G/HG/H is solvable, then for a pp-subgroup PP of HH, if the Scott kHkH-module with vertex PP is Brauer indecomposable, then so is the Scott kGkG-module with vertex PP, where kk is a field of characteristic p>0p>0. This has several applications.

Keywords

Cite

@article{arxiv.2409.00403,
  title  = {Lifting Brauer indecomposability of a Scott module},
  author = {Shigeo Koshitani and İpek Tuvay},
  journal= {arXiv preprint arXiv:2409.00403},
  year   = {2025}
}

Comments

The proof is wrong

R2 v1 2026-06-28T18:29:51.737Z