AUTOMORPHISMS OF CHEVALLEY GROUPS OF TYPES A_l,D_l,E_l OVER LOCAL RINGS WITHOUT 1/2

摘要

In this paper, we prove that every automorphism of a Chevalley group of type A_l, D_l, or E_l, l≥3, over a commutative local ring without 1/2 is standard, i.e., it is a composition of ring, inner, central, and graph automorphisms.