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. 
@article{AL_2009_48_4_a1,
     author = {E. I. Bunina},
     title = {Automorphisms of elementary adjoint {Chevalley} groups of types $A_l$, $D_l$, and $E_l$ over local rings with~1/2},
     journal = {Algebra i logika},
     pages = {443--470},
     publisher = {mathdoc},
     volume = {48},
     number = {4},
     year = {2009},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/AL_2009_48_4_a1/}
}
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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/