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Automorphisms of Twisted Chevalley Groups over Commutative Rings
We classify all abstract automorphisms of the elementary and full twisted Chevalley groups of types ${}^2A_\ell$ ($\ell\geq3$), ${}^2D_\ell$ ($\ell\geq4$), ${}^2E_6$, and ${}^3D_4$ over arbitrary commutative rings, for every invariant isogeny type. The coefficient automorphism $θ$ has order dividing
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