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arXiv 1801.04094math.ATmath.AG
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等变形式复曲面轨道的无限族

Infinite Families of Equivariantly Formal Toric Orbifolds

Anthony Bahri, Soumen Sarkar, Jongbaek Song

摘要:

在单纯复形和单纯多面体上的单纯楔形构造已经被许多作者用来研究复曲面和相关的空间,包括非奇异复曲面簇、复曲面流形、二次曲面的交和更一般的多面体积。在本文中,我们扩展分析,包括复曲面orbifolds。我们的主要结果产生的环面orbifolds的无限家庭,来自一个给定的,其积分上同调是免费的挠,并集中在偶数度,一个属性,这可能被称为\emph{integrally equivariantly formal}。在所有情况下,都可以给出上同调环的描述,并将其与原始orbifold的上同调联系起来。

英文摘要:

The simplicial wedge construction on simplicial complexes and simple polytopes has been used by a variety of authors to study toric and related spaces, including non-singular toric varieties, toric manifolds, intersections of quadrics and more generally, polyhedral products. In this paper we extend the analysis to include toric orbifolds. Our main results yield infinite families of toric orbifolds, derived from a given one, whose integral cohomology is free of torsion and is concentrated in even degrees, a property which might be termed \emph{integrally equivariantly formal}. In all cases, it is possible to give a description of the cohomology ring and to relate it to the cohomology of the original orbifold.

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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