Abstract:
It is proved that every finite group isospectral to an alternating group An of degree n greater than 21 has a chief factor isomorphic to an alternating group Ak, where k⩽n and the half-interval (k,n] contains no primes.
Keywords:
finite groups, alternating groups, spectrum of a group, isospectral groups, chief factors.
Citation:
I. A. Vakula, “On the structure of finite groups isospectral to an alternating group”, Trudy Inst. Mat. i Mekh. UrO RAN, 16, no. 3, 2010, 45–60; Proc. Steklov Inst. Math. (Suppl.), 272, suppl. 1 (2011), S271–S286