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On automorphisms and the cone conjecture for Enriques surfaces in odd characteristic (1908.07928v3)
Published 20 Aug 2019 in math.AG
Abstract: We prove that, for an Enriques surface in odd characteristic, the automorphism group is finitely generated and it acts on the effective nef cone with a rational polyhedral fundamental domain. We also construct a smooth projective surface in odd characteristic which is birational to an Enriques surface and whose automorphism group is discrete but not finitely generated.
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