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arXiv · 2403.10712

Jacobian elliptic fibrations on K3s with a non-symplectic automorphism of order 3

Felipe Zingali Meira
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Abstract

We classify Jacobian elliptic fibrations on K3 surfaces with a non-symplectic automorphism $\sigma$ of order 3 according to the action of $\sigma$ on their fibres, building on work by Garbagnati and Salgado for non-symplectic involutions. We determine the possible reducible fibres types and give Weierstrass equations for Jacobian elliptic fibration which are preserved by $\sigma$. For a K3 surface $X$ with Picard number at least 12 and $\sigma$ acting trivially on $\NS X$, we apply the Kneser--Nishiyama method to find its Jacobian elliptic fibrations, and use our method to classify them in relation to every non-symplectic automorphism of order 3 in $\Aut X$.

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Felipe Zingali Meira. 2024-03-15. Jacobian elliptic fibrations on K3s with a non-symplectic automorphism of order 3. https://arxiv.org/abs/2403.10712

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