Automorphisms of Chevalley groups of types Al, Dl, or El over local rings with 1/2

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Abstract

In this paper, we prove that every automorphism of an (elementary) Chevalley group of type Al, Dl, or El, l ≥ 2, over a commutative local ring with 1/2 is standard, i.e., is the composition of inner, ring, graph, and central automorphisms.

Original languageEnglish
Pages (from-to)35-59
Number of pages25
JournalFundamental and Applied Mathematics
Volume15
Issue number2
StatePublished - 2009

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