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math.AG2020
Automorphisms of nonnormal toric varieties
Ilya Boldyrev, Sergey Gaifullin
In this paper we prove criteria for a nonnormal toric variety to be flexible, to be rigid and to be almost rigid. For rigid and almost rigid toric varieties we describe the automor…
math.AG2020
Isolated torus invariants and automorphism groups of rigid varieties
Viktoria Borovik, Sergey Gaifullin
Perepechko and Zaidenberg conjectured that the neutral component of the automorphism group of a rigid affine variety is a torus. We prove this conjecture for toric varieties and va…