English

On splitting of the normalizer of a maximal torus in $E_6(q)$

Group Theory 2019-11-15 v1

Abstract

Let GG be a finite group of Lie type E6E_6 over FqF_q (adjoint or simply connected) and WW be the Weyl group of GG. We describe maximal tori TT such that TT has a complement in its algebraic normalizer N(G,T)N(G,T). It is well known that for each maximal torus TT of GG there exists an element wWw\in W such that N(G,T)/TCW(w)N(G,T)/T\simeq C_W(w). When TT does not have a complement isomorphic to CW(w)C_W(w), we show that ww has a lift in N(G,T)N(G,T) of the same order.

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Cite

@article{arxiv.1806.02619,
  title  = {On splitting of the normalizer of a maximal torus in $E_6(q)$},
  author = {Alexey Galt and Alexey Staroletov},
  journal= {arXiv preprint arXiv:1806.02619},
  year   = {2019}
}

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17 pages