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
Link To Document :
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