An adjoint Chevalley group of rank at least 2 over a rational algebra (or a similar ring), its elementary subgroup, and the corresponding Lie ring have the same automorphism group. These automorphisms are explicitly described. (C) 2010 Elsevier Inc. All rights reserved.
机构:
Department of Mathematics,University of Milano,via C.Saldini 50,20133,Milano,Italy.Department of Mathematics,University of Milano,via C.Saldini 50,20133,Milano,Italy.