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math.AG2021
Maximal commutative unipotent subgroups and a characterization of affine spherical varieties
Andriy Regeta, Immanuel van Santen
We describe maximal commutative unipotent subgroups of the automorphism group of an irreducible affine variety . Further we show that a group isomorphism $\mat…
math.AG2021
Bracket width of simple Lie algebras
Adrien Dubouloz, Boris Kunyavskii, Andriy Regeta
The notion of commutator width of a group, defined as the smallest number of commutators needed to represent each element of the derived group as their product, has been extensivel…