Geodesic
Automorphisms of elementary adjoint Chevalley groups of types $A_l$, $D_l$, and $E_l$ over local rings with~1/2
Algebra i logika, Tome 48 (2009) no. 4, pp. 443-470.

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It is proved that every automorphism of an elementary adjoint Chevalley group of type $A_l$, $D_l$, or $E_l$ over a local commutative ring with 1/2 is a composition of a ring automorphism and conjugation by some matrix from the normalizer of that Chevalley group in $GL(V)$ ($V$ is an adjoint representation space).
Mots-clés : automorphism
Keywords: elementary adjoint Chevalley group, local commutative ring. 
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E. I. Bunina. Automorphisms of elementary adjoint Chevalley groups of types $A_l$, $D_l$, and $E_l$ over local rings with~1/2. Algebra i logika, Tome 48 (2009) no. 4, pp. 443-470. http://geodesic.mathdoc.fr/item/AL_2009_48_4_a1/

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