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arXiv · 0907.5595

Automorphisms of Chevalley groups of types $A_l, D_l, E_l$ over local rings with 1/2

E. I. Bunina
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Abstract

In the paper we prove that every automorphism of a (elementary) Chevalley group of type $A_l, D_l$, or $E_l$, $l\geqslant 2$, over a commutative local ring with 1/2 is standard, i. e., is the composition of inner, ring, graph and central automorphisms.

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E. I. Bunina. 2009-08-09. Automorphisms of Chevalley groups of types $A_l, D_l, E_l$ over local rings with 1/2. https://arxiv.org/abs/0907.5595

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