The spectrum of a finite group is the set of its elements orders. Groups are said to be isospectral if their spectra coincide. For every finite simple exceptional group L = E 7 (q), we prove that each finite group G isospectral to L is squeezed between L and its automorphism group, that is L ≤ G ≤ Aut L; in particular, there are only finitely many such groups. This assertion with a series of previously obtained results yields that the same is true for every finite simple exceptional group except the group 3 D 4 (2).
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.