Automorphisms of tiled orders
Abstract
Let Λ be a tiled R-order. We give a description of AutR(Λ) as the semidirect product of
Inn(Λ) and a certain subgroup of Aut(Q(Λ)), where Q(Λ) is the link graph of Λ. Additionally,
we give criteria for determining when an element of Aut(Q(Λ)) belongs to this subgroup in
terms of the exponent matrix for Λ. © 2002 Elsevier Science Inc. All rights reserved.