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arXiv 2210.07375math.AGmath.NT
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K3曲面模空间Noether-Lefschetz轨迹中的有理点

Rational points in the Noether-Lefschetz locus of moduli spaces of K3 surfaces

Domenico Valloni

摘要:

本文研究了由素指数子格诱导的格极化K3曲面的模空间之间的映射。我们表明,这些映射可以用来确定是否模空间的有理点属于Noether-Lefschetz轨迹。作为一个应用,我们证明了Bjueri-Lang猜想蕴涵着Noether-Lefschetz轨迹中的有理点的非密度陈述,正如Shafarevich猜想所预言的那样.

英文摘要:

In this paper, we study maps between moduli spaces of lattice-polarized K3 surfaces induced by sublattices of prime index. We show that these maps can be used to determine if a rational point of the moduli space belongs to the Noether-Lefschetz locus. As an application, we prove that the Bombieri-Lang conjecture implies non-density statements for the rational points in the Noether-Lefschetz locus, as predicted by a conjecture of Shafarevich.

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