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A non-symplectic automorphism of order 21 of a K3 surface
Published 23 Oct 2015 in math.AG | (1510.06843v2)
Abstract: In this paper, we prove that, over an algebraically closed field whose characteristic is not 2,3 nor 7, a pair of a K3 surface and a purely non-symplectic automorphism of order 21 or 42 is unique up to isomorphism.
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