• Title of article

    On almost recognizability by spectrum of simple classical groups

  • Author/Authors

    Staroletov ، Alexey Sobolev Institute of Mathematics

  • Pages
    27
  • From page
    7
  • To page
    33
  • Abstract
    ‎The set of element orders of a finite group $G$ is called the {em spectrum}‎. ‎Groups with coinciding spectra are said to be {em isospectral}‎. ‎It is known that if $G$ has a nontrivial normal soluble subgroup then there exist infinitely many pairwise non-isomorphic‎ ‎groups isospectral to $G$‎. ‎The situation is quite different if $G$ is a nonabelain simple group‎. ‎Recently it was proved that if $L$ is a simple classical group of dimension at least 62 and $G$ is a finite group‎ ‎isospectral to $L$‎, ‎then up to isomorphism $Lleq GleqAut L$‎. ‎We show that the assertion remains true‎ ‎if 62 is replaced by 38‎.
  • Keywords
    Simple classical groups , Element orders , Prime graph of a finite group , Almost recognizable group.
  • Journal title
    International Journal of Group Theory
  • Serial Year
    2017
  • Journal title
    International Journal of Group Theory
  • Record number

    2449087