Title of article :
On almost recognizability by spectrum of simple classical groups
Author/Authors :
Staroletov ، Alexey Sobolev Institute of Mathematics
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
Journal title :
International Journal of Group Theory