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arXiv 2302.01679math.AG
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极化Enriques曲面的模空间——计算方面

Moduli of polarized Enriques surfaces -- computational aspects

Mathieu Dutour Sikirić, Klaus Hulek

AI总结:

本文研究了极化Enriques曲面模空间的算术群,证明共轭意义下恰有87个此类群,且所有模空间均由度为1240的模空间统治,并计算了相关群的Tits building。

摘要:

(极化)Enriques曲面的模空间可以被描述为正交型模簇的开子集。Gritsenko和Hulek已经证明,在同构意义下,仅存在有限多个不同的极化Enriques曲面模空间。在此我们研究了可能的算术群,并证明在共轭意义下恰好存在87个这样的群。我们还证明了所有模空间都由度为1240的极化Enriques曲面模空间所统治。Ciliberto、Dedieu、Galati和Knutsen也详细研究了极化Enriques曲面的模空间。我们讨论了我们的枚举与他们的研究之间的关系。我们进一步计算了这些群的Tits building。我们的计算基于群和不定二次型,并解释了所使用的算法。

英文摘要:

Moduli spaces of (polarized) Enriques surfaces can be described as open subsets of modular varieties of orthogonal type. It was shown by Gritsenko and Hulek that there are, up to isomorphism, only finitely many different moduli spaces of polarized Enriques surfaces. Here we investigate the possible arithmetic groups and show that there are exactly $87$ such groups up to conjugacy. We also show that all moduli spaces are dominated by a moduli space of polarized Enriques surfaces of degree $1240$. Ciliberto, Dedieu, Galati, and Knutsen have also investigated moduli spaces of polarized Enriques surfaces in detail. We discuss how our enumeration relates to theirs. We further compute the Tits building of the groups in question. Our computation is based on groups and indefinite quadratic forms and the algorithms used are explained.

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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