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arXiv 2101.11264math.ATmath.DG
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TC结构的特征类

Characteristic classes for TC structures

Mauricio Cepeda Davila

摘要:

本文研究了主$G$ -丛的特征类的构造,它具有一个称为传递交换结构(TC结构)的附加结构。这些结构分类,同伦,可能trivializations的主要$G$ -束,使诱导的上循环有功能,在其域的交叉点交换。我们主要关注结构群$G$等于$SU(n)$、$U(n)$或$\mathrm{Sp}(n)$的情况。我们的方法是一个代数尺规作图法,依赖于所谓的权力地图上定义的空间$B_{\mathrm{com}}G$,分类空间的交换性在组$G$。

英文摘要:

In this article we study the construction of characteristic classes for principal $G$-bundles equipped with an additional structure called transitionally commutative structure (TC structure). These structures classify, up to homotopy, possible trivializations of a principal $G$-bundle, such that the induced cocycle have functions that commute in the intersections of their domains. We focus mainly on the cases where the structural group $G$ equals $SU(n)$, $U(n)$ or $\mathrm{Sp}(n)$. Our approach is an algebraic-geometric construction that relies on the so called power maps defined on the space $B_{\mathrm{com}}G$, the classifying space for commutativity in the group $G$.

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