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arXiv 1902.10686math.AG
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椭圆K3曲面的紧模

Compact moduli of elliptic K3 surfaces

Kenneth Ascher, Dori Bejleri

摘要:

我们使用极小模型程序中的工具构造了椭圆K3曲面空间的各种模紧化,并明确地描述了由其边界参数化的曲面。我们所构造的紧化的粗糙空间允许态射到Satake-Bachelor-Borel紧化。最后,我们证明了我们的一个空间是光滑的粗糙空间的GIT商的Weierstrass K3曲面对与选定的纤维。

英文摘要:

We construct various modular compactifications of the space of elliptic K3 surfaces using tools from the minimal model program, and explicitly describe the surfaces parametrized by their boundaries. The coarse spaces of our constructed compactifications admit morphisms to the Satake-Baily-Borel compactification. Finally, we show that one of our spaces is smooth with coarse space the GIT quotient of pairs of Weierstrass K3 surfaces with a chosen fiber.

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