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arXiv 1208.3370math.AT
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配边范畴的同伦群的几何解释

A geometric interpretation of the homotopy groups of the cobordism category

Marcel Bökstedt, Anne Marie Svane

摘要:

Galatius、Tillmann、Madsen和Weiss将嵌入配边范畴的分类空间确定为某个Thom谱的无限闭路空间。这就用经典的配边群来标识路径分量的集合。本文给出了高阶同伦群的一个几何解释,即所有流形在其切丛中都具有一组正交截面的某些配边群。我们还给出了基本群作为一个自由群的描述,并给出了一组几何直观关系。

英文摘要:

The classifying space of the embedded cobordism category has been identified in by Galatius, Tillmann, Madsen, and Weiss as the infinite loop space of a certain Thom spectrum. This identifies the set of path components with the classical cobordism group. In this paper, we give a geometric interpretation of the higher homotopy groups as certain cobordism groups where all manifolds are now equipped with a set of orthonormal sections in the tangent bundle. We also give a description of the fundamental group as a free group with a set of geometrically intuitive relations.

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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