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arXiv 1807.04057math.AG
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开 de Rham 空间的算术与度量方面

Arithmetic and metric aspects of open de Rham spaces

Tamás Hausel, Michael Lennox Wong, Dimitri Wyss

AI总结:

本文利用母题傅里叶变换计算开 de Rham 空间的母题类,验证纯度猜想,并将其等同于带重数箭图簇,进而构造自然的完备超凯勒度量。

摘要:

在本文中,我们确定了开 de Rham 空间的母题类——特别是权多项式,并且根据猜想确定了庞加莱多项式——该空间由 Boalch 定义并研究,来自 $\mathbb{P}^1$ 上平凡秩 $n$ 丛上某些不规则亚纯连接模空间。计算通过母题傅里叶变换完成。我们证明该结果满足纯度猜想,即它与相应野特征簇的猜想混合霍奇多项式的纯部分一致。我们还将开 de Rham 空间等同于 Yamakawa 与 Geiss--Leclerc--Schröer 的带重数箭图簇。最后,我们在其上构造自然的完备超凯勒度量,在 $4$ 维情形下预期为 ALF 型。

英文摘要:

In this paper we determine the motivic class--in particular, the weight polynomial and conjecturally the Poincaré polynomial--of the open de Rham space, defined and studied by Boalch, of certain moduli spaces of irregular meromorphic connections on the trivial rank $n$ bundle on $\mathbb{P}^1$. The computation is by motivic Fourier transform. We show that the result satisfies the purity conjecture, that is, it agrees with the pure part of the conjectured mixed Hodge polynomial of the corresponding wild character variety. We also identify the open de Rham spaces with quiver varieties with multiplicities of Yamakawa and Geiss--Leclerc--Schröer. We finish with constructing natural complete hyperkähler metrics on them, which in the $4$-dimensional cases are expected to be of type ALF.

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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