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arXiv 2303.01404math.AGmath.DG
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偶数极稳定向上流上的Hitchin映射

Hitchin map on even very stable upward flows

Miguel González, Tamás Hausel

AI总结:

本文定义了偶数极稳定Higgs丛,研究了其向上流上的Hitchin映射,并在GL(n)情形下对类型(1,...,1)的例子进行分类,揭示了其与根系及等变上同调谱的深刻联系。

摘要:

我们定义了偶数极稳定Higgs丛,并研究了限制在其向上流上的Hitchin映射。在GL(n)情形下,我们对类型(1,...,1)的例子进行了分类,发现它们受由偶数高度的根构成的根系控制。我们讨论了四元Grassmann流形、4n维球面和实Cayley平面的等变上同调谱如何描述偶数cominuscule向上流上的Hitchin映射。所讨论的偶数向上流与准分裂内部实形式的Higgs丛模空间中的向上流相同。后者由Oscar García-Prada及其合作者开创。

英文摘要:

We define even very stable Higgs bundles and study the Hitchin map restricted to their upward flows. In the GL(n) case we classify the type (1,...,1) examples, and find that they are governed by a root system formed by the roots of even height. We discuss how the spectrum of equivariant cohomology of quaternionic Grassmannians, 4n-spheres and the real Cayley plane appear to describe the Hitchin map on even cominuscule upward flows. The even upward flows in question are the same as upward flows in Higgs bundle moduli spaces for quasi-split inner real forms. The latter spaces have been pioneered by Oscar García-Prada and his collaborators.

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