English

$2$-Blocks whose defect group is homocyclic and whose inertial quotient contains a Singer cycle II

Representation Theory 2020-04-07 v1 Group Theory

Abstract

We consider 22-blocks of finite groups with defect group D=Q×RD=Q \times R and inertial quotient E\mathbb{E} where Q(C2m)nQ \cong (C_{2^m})^n, RC2rR \cong C_{2^r}, and E\mathbb{E} contains a Singer cycle of Aut(Q)\operatorname{Aut}(Q) (an element of order 2n12^n-1). We classify such blocks up to Morita equivalence when either E\mathbb{E} is cyclic or r=1r=1. We achieve a partial classification when r>1r>1 and EE is non-cyclic.

Keywords

Cite

@article{arxiv.2004.02190,
  title  = {$2$-Blocks whose defect group is homocyclic and whose inertial quotient contains a Singer cycle II},
  author = {Elliot Mckernon},
  journal= {arXiv preprint arXiv:2004.02190},
  year   = {2020}
}

Comments

14 pages