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arXiv 2007.01275math.NTmath.AG
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Shimura 变种的积分模型中的标准化

Normalization in integral models of Shimura varieties of Hodge type

Harvard University(哈佛大学)

Yujie Xu

AI总结:

本文证明Hodge类型Shimura变种的积分模型可通过嵌入到Siegel模形式积分模型中,且标准化步骤冗余,同时扩展到toroidal紧致化的嵌入结果。

摘要:

设(G,X)为Hodge类型Shimura数据,其积分模型具有超特殊(resp. 假定群是无分歧)层级结构。我们证明,S_K(G,X)可以嵌入到Siegel模形式的积分模型S_{K'}(GSp,S^{±})中,这种嵌入与模解释相容。特别地,构造S_K(G,X)时的标准化步骤是冗余的。特别地,我们的结果适用于Rapoport、Kottwitz等早期构造的积分模型(resp. Rapoport-Zink等),因为这些模型与适当选择的Shimura数据的Hodge类型积分模型一致。此外,结合Lan关于积分模型toroidal紧致化边界组件的结果,我们的结果还表明,对于适当选择的锥分解,Hodge类型积分模型的toroidal紧致化可以嵌入到Siegel积分模型的toroidal紧致化中。

英文摘要:

Let $(G,X)$ be a Shimura datum of Hodge type, and $\mathscr{S}_K(G,X)$ its integral model with hyperspecial (resp. parahoric, assuming the group is unramified) level structure. We prove that $\mathscr{S}_K(G,X)$ admits a closed embedding, which is compatible with moduli interpretations, into the integral model $\mathscr{S}_{K'}(\mathrm{GSp},S^{\pm})$ for a Siegel modular variety. In particular, the normalization step in the construction of $\mathscr{S}_K(G,X)$ is redundant. In particular, our results apply to the earlier integral models constructed by Rapoport, Kottwitz etc. (resp. Rapoport-Zink etc.), as those models agree with the Hodge type integral models for appropriately chosen Shimura data. Moreover, combined with a result of Lan's on the boundary components of toroidal compactifications of integral models, our result also implies that there exist closed embeddings of toroidal compactifications of integral models of Hodge type into toroidal compactifications of Siegel integral models, for suitable choices of cone decompositions.

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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