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Infinitesimal Torelli for elliptic surfaces revisited

Published 20 Jul 2020 in math.AG | (2007.10207v1)

Abstract: In this article we give a new proof for the infinitesimal Torelli theorem for minimal elliptic surfaces without multiple fibers with Euler number at least 24 for nonconstant $j$-invariant. In the case of constant $j$-invariant we find a new proof in the case of Euler number at least 72. We also discuss several new counterexamples.

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