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arXiv 2303.16638math.AGmath.KT
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椭圆 K3 曲面与 Jacobian 的导出等价

Derived equivalence of elliptic K3 surfaces and Jacobians

Reinder Meinsma, Evgeny Shinder

AI总结:

本文研究 K3 的 Fourier–Mukai 伙伴上的导出椭圆结构,利用 Hodge 数据与判别群完成分类,并据此回答椭圆 K3 曲面伙伴是否均为 Jacobian 的问题。

摘要:

我们对 K3 曲面的 Fourier–Mukai 伙伴上的椭圆纤维化进行了详细研究,并称其为导出椭圆结构。我们依据 Hodge 理论数据对导出椭圆结构作出完整分类,这类似于描述 Fourier–Mukai 伙伴的导出 Torelli 定理。在 Picard 秩为 2 时,导出椭圆结构完全由判别群的 Lagrangian 子群决定。因此,我们证明:对于一大类 Picard 秩为 2 的椭圆 K3 曲面,其所有 Fourier–Mukai 伙伴都是 Jacobian;并且我们将该结果部分推广到非闭域。我们还表明,存在这样的椭圆 K3 曲面,其 Fourier–Mukai 伙伴并非原 K3 曲面的 Jacobian。这为 Hassett 和 Tschinkel 提出的一个问题给出了否定答案。

英文摘要:

We present a detailed study of elliptic fibrations on Fourier-Mukai partners of K3 surfaces, which we call derived elliptic structures. We fully classify derived elliptic structures in terms of Hodge-theoretic data, similar to the Derived Torelli Theorem that describes Fourier-Mukai partners. In Picard rank two, derived elliptic structures are fully determined by the Lagrangian subgroups of the discriminant group. As a consequence, we prove that for a large class of Picard rank 2 elliptic K3 surfaces all Fourier-Mukai partners are Jacobians, and we partially extend this result to non-closed fields. We also show that there exist elliptic K3 surfaces with Fourier-Mukai partners which are not Jacobians of the original K3 surface. This gives a negative answer to a question raised by Hassett and Tschinkel.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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