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arXiv 0710.3722math.AT
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Ganea和Whitehead定义的叶状流形的切向Lusternik-Schnirelmann范畴

Ganea and Whitehead definitions for the tangential Lusternik-Schnirelmann category of foliations

Université de Lille 1(里尔第一大学);Universidade de Santiago de Compostela(圣地亚哥-德孔波斯特拉大学)

Jean-Paul Doeraene, Enrique Macias-Virgós, Daniel Tanré

AI总结:

本文在分层空间范畴中发展了Ganea和Whitehead定义的叶状流形切向Lusternik-Schnirelmann范畴,通过比较与开集定义的第三不变量,证明在闭流形上这些定义与切向范畴一致且为同调不变量。

摘要:

本文解决了对叶状流形分层空间中Ganea和Whitehead定义的切向范畴进行扩展的问题。我们在这类分层空间中发展了这两个概念,即拓扑空间X配备一个划分F,并将其与通过开集定义的第三不变量进行比较。更具体地说,这些定义适用于分层空间(X,F)中的元素以及X的子集类A;它们类似于M.Clapp和D.Puppe引入的不变量。如果(X,F)∈Tops,则定义切向子集为X的子空间A,使得任何S∈F与A的交集至多可数。然后通过沿切向子集取下界来定义Whitehead和Ganea的LS范畴。当X是闭流形且配备C¹叶状结构时,这三个定义在A为切向子集类时与切向范畴一致,并且是同调不变量。

英文摘要:

This work solves the problem of elaborating Ganea and Whitehead definitions for the tangential category of a foliated manifold. We develop these two notions in the category $\Tops$ of stratified spaces, that are topological spaces $X$ endowed with a partition $\cF$ and compare them to a third invariant defined by using open sets. More precisely, these definitions apply to an element $(X,\cF)$ of $\Tops$ together with a class $\cA$ of subsets of $X$; they are similar to invariants introduced by M. Clapp and D. Puppe. If $(X,\cF)\in\Tops$, we define a transverse subset as a subspace $A$ of $X$ such that the intersection $S\cap A$ is at most countable for any $S\in \cF$. Then we define the Whitehead and Ganea LS-categories of the stratified space by taking the infimum along the transverse subsets. When we have a closed manifold, endowed with a $C^1$-foliation, the three previous definitions, with $\cA$ the class of transverse subsets, coincide with the tangential category and are homotopical invariants.

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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