Takashi Kishimoto, Yuri Prokhorov, Mikhail Zaidenberg
Published 2012-12-18, updated 2014-01-08Version 3
We give a criterion of existence of a unipotent group action on the affine cone over a projective variety or, more generally, on the affine quasicone over a variety which is projective over another affine variety.
Comments: 16p. In a formula in the proof of Lemma 2.3, the direct sum was replaced by the usual sum . The authors are grateful to Kevin Langlois for mentioning this inaccuracy
Journal: Transformation Groups Volume 18, Issue 4 (2013) pp 1137-1153
When is the automorphism group of an affine variety nested?
Quotients of an affine variety by an action of a torus
Hodge Theory and Deformations of Affine Cones of Subcanonical Projective Varieties
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