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arXiv math/0002031math.AGhep-th
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环面流形上等变向量丛的分裂型

On the Splitting Type of an Equivariant Vector Bundle over a Toric Manifold

Chien-Hao Liu, Shing-Tung Yau

摘要:

根据Lian,Liu,Yau关于"镜像原理"的工作,在环面流形上的等变凹丛${\cal E}$的Euler数据$Q=\{Q_0, Q_1, ... \}$的显式计算中,丛的结构在两个地方起作用:(1)$V$的乘法特征类$Q_0$开始,(2)${\cal E}$的分裂类型。在复曲面流形上的等变丛已被Kaneyama分类,使用的数据有关的线性化的基础复曲面流形上的复曲面作用。本文将${\cal E}$的分裂类型与金山的分类数据联系起来。从这些关系出发,我们计算了环面流形上的一对不可分裂等变向量丛的分裂类型,这对弦论和镜像对称可能是有意义的。一个在Mathematica中的代码,执行其中一些例子的计算是附加的。

英文摘要:

From the work of Lian, Liu, and Yau on "Mirror Principle", in the explicit computation of the Euler data $Q=\{Q_0, Q_1, ... \}$ for an equivariant concavex bundle ${\cal E}$ over a toric manifold, there are two places the structure of the bundle comes into play: (1) the multiplicative characteric class $Q_0$ of $V$ one starts with, and (2) the splitting type of ${\cal E}$. Equivariant bundles over a toric manifold has been classified by Kaneyama, using data related to the linearization of the toric action on the base toric manifold. In this article, we relate the splitting type of ${\cal E}$ to the classifying data of Kaneyama. From these relations, we compute the splitting type of a couple of nonsplittable equivariant vector bundles over toric manifolds that may be of interest to string theory and mirror symmetry. A code in Mathematica that carries out the computation of some of these examples is attached.

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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