English

A generalization of Szep's conjecture for almost simple groups

Group Theory 2022-08-19 v1

Abstract

We prove a natural generalization of Szep's conjecture. Given an almost simple group GG with socle not isomorphic to an orthogonal group having Witt defect zero, we classify all possible group elements x,yG{1}x,y\in G\setminus\{1\} with G=NG(x)NG(y)G={\bf N}_G (\langle x\rangle){\bf N}_G(\langle y\rangle), where we are denoting by NG(x){\bf N}_G(\langle x\rangle) and by NG(y){\bf N}_G(\langle y\rangle) the normalizers of the cyclic subgroups x\langle x\rangle and y\langle y\rangle. As a consequence of this result, we classify all possible group elements x,yG{1}x,y\in G\setminus\{1\} with G=CG(x)CG(y)G={\bf C}_G(x){\bf C}_G(y).

Keywords

Cite

@article{arxiv.2208.08763,
  title  = {A generalization of Szep's conjecture for almost simple groups},
  author = {Nick Gill and Michael Giudici and Pablo Spiga},
  journal= {arXiv preprint arXiv:2208.08763},
  year   = {2022}
}

Comments

36 pages

R2 v1 2026-06-25T01:47:39.971Z