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math.AG2013
Additive actions on projective hypersurfaces
Ivan Arzhantsev, Andrey Popovskiy
By an additive action on a hypersurface H in the projective space P^{n+1} we mean an effective action of a commutative unipotent group on P^{n+1} which leaves H invariant and acts…
math.AG2013★ 27 cited
Infinite transitivity on universal torsors
Ivan Arzhantsev, Alexander Perepechko, Hendrik Süß
Let X be an algebraic variety covered by open charts isomorphic to the affine space and q: X' \to X be the universal torsor over X. We prove that the automorphism group of the quas…