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arXiv 1303.3288math.AGmath.SG
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三维Fano流形的量子周期

Quantum Periods for 3-Dimensional Fano Manifolds

Tom Coates, Alessio Corti, Sergey Galkin, Alexander Kasprzyk

摘要:

簇X的量子周期是X的某些Gromov-Witten不变量的生成函数,该不变量在镜像对称性中发挥着重要作用。本文计算了所有三维Fano流形的量子周期。特别是,我们表明,3维Fano流形非常丰富的anticanonical丛有镜子的集合洛朗多项式称为闵可夫斯基多项式。这是在与Golyshev联合工作中发现的。提出了一种新的Fano流形分类方法:通过证明一个适当的镜像定理,进而对Fano镜像进行分类。我们的方法可能是独立的利益。本文重新修正了三维Fano流形的Mori-Mukai分类,证明了它们都可以表示为GIT商V/G上齐次向量丛的一段零轨迹,其中G是GL_n(C)型群的乘积,V是G的表示.当G=GL_1(C)^r时,它将Fano 3-fold表示为环面完全交;在其余情况下,它将Fano 3-fold表示为格拉斯曼流形、部分旗流形或其上的投射丛的重言子簇。然后,我们计算量子周期使用量子Lefschetz超平面定理的Coates-Givental和阿贝尔/非阿贝尔对应的Bertram-Ciocan-Fontanine-Kim-Sabbah。

英文摘要:

The quantum period of a variety X is a generating function for certain Gromov-Witten invariants of X which plays an important role in mirror symmetry. In this paper we compute the quantum periods of all 3-dimensional Fano manifolds. In particular we show that 3-dimensional Fano manifolds with very ample anticanonical bundle have mirrors given by a collection of Laurent polynomials called Minkowski polynomials. This was conjectured in joint work with Golyshev. It suggests a new approach to the classification of Fano manifolds: by proving an appropriate mirror theorem and then classifying Fano mirrors. Our methods are likely to be of independent interest. We rework the Mori-Mukai classification of 3-dimensional Fano manifolds, showing that each of them can be expressed as the zero locus of a section of a homogeneous vector bundle over a GIT quotient V/G, where G is a product of groups of the form GL_n(C) and V is a representation of G. When G=GL_1(C)^r, this expresses the Fano 3-fold as a toric complete intersection; in the remaining cases, it expresses the Fano 3-fold as a tautological subvariety of a Grassmannian, partial flag manifold, or projective bundle thereon. We then compute the quantum periods using the Quantum Lefschetz Hyperplane Theorem of Coates-Givental and the Abelian/non-Abelian correspondence of Bertram-Ciocan-Fontanine-Kim-Sabbah.

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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