Automorphisms of Chevalley groups of types $A_l, D_l, E_l$ over local rings without 1/2

Details Automorphisms of Chevalley groups of types $A_l, D_l, E_l$ over local rings without 1/2 Automorphisms of Chevalley groups of types $A_l, D_l, E_l$ over local rings without 1/2

2010-02-05

arxiv.org/abs/1002.1266v1

Mathematics

Group Theory

Scientific paper

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

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