中文

Chow 商的拓扑方面

代数几何 2007-05-23 v4 微分几何

摘要

本文研究光滑射影簇关于约化代数群的典范 Chow 商。主要目的是给出 Chow 商的一些拓扑解释与刻画,其优点在于更直观且更具几何性。这是在复数域上、并用拓扑学家与微分几何学家所熟悉的语言来进行的。更确切地说,本文的主要观察是:在复数域上,Chow 商容许辛解释与其他拓扑解释,即辛地看,为具有指定动量荷的稳定轨道的模空间;拓扑地看,为稳定作用流形的模空间。此外,我们利用所谓的扰动-平移-特殊化关系,给出了 Chow 商的 Chow 圈的一个可计算刻画。

关键词

引用

@article{arxiv.math/0308027,
  title  = {Topological Aspects of Chow Quotients},
  author = {Yi Hu},
  journal= {arXiv preprint arXiv:math/0308027},
  year   = {2007}
}

备注

36 pages. Improved version. Introduction was completely rewritten with five newly added figures to help to illustrate the ideas. The introduction is written with nonspecialists in mind, in particular, a simple, yet quite informative example is used throughout to explain the ideas behind GIT quotients, the Chow quotient, and our topological approaches