Automorphisms of blocks of group algebras and character values

摘要

Let G be a finite group, X an irreducible complex character of G and A(X) the block ideal of the group algebra QG related to X. The aim of this paper is to study the group Aut(A(X)) of all ring (or Q-algebra) automorphisms of A(X). Especially we are interested in the existence of subgroups Г of Aut (A(X))