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arXiv 1602.03009math.AT
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交叉同源性。广义不变性与拓扑不变性

Intersection Homology. General perversities and topological invariance

David Chataur, Martintxo Saralegi-Aranguren, Daniel Tanré

摘要:

Goresky和MacPherson证明的无余维层伪流形的交同调的拓扑不变性是这种同调的主要特征之一。这个性质对于具有某些增长条件的余维依赖的Permian是成立的,验证了$\overline p(1)=\overline p(2)=0$。King通过将一个内在的伪流形$X^*$与任何伪流形$X$联系起来来反驳这种不变性。他的证明包括一个同构之间的相关交叉同源$H^{\overline{p}}_{*}(X) \cong H^{\overline{p}}_{*}( X^*)$的任何反常$\overline{p}$具有相同的增长条件验证$\overline p(1)\geq 0$。本文在层依赖反常$\overline{p}$的框架下证明了一个拓扑不变性,当$\overline{p}$是GM反常时,它对应于经典的拓扑不变性.我们还将其扩展到驯服的交叉同源性,交叉同源性的一个变化,特别适合于“大”的perception,如果没有奇异层$X$成为定期在$X^*$。特别地,在上述条件下,相交同调和驯服相交同调在分层的细化下是不变的。

英文摘要:

Topological invariance of the intersection homology of a pseudomanifold without codimension one strata, proven by Goresky and MacPherson, is one of the main features of this homology. This property is true for codimension-dependent perversities with some growth conditions, verifying $\overline p(1)=\overline p(2)=0$. King reproves this invariance by associating an intrinsic pseudomanifold $X^*$ to any pseudomanifold $X$. His proof consists of an isomorphism between the associated intersection homologies $H^{\overline{p}}_{*}(X) \cong H^{\overline{p}}_{*}( X^*)$ for any perversity $\overline{p}$ with the same growth conditions verifying $\overline p(1)\geq 0$. In this work, we prove a certain topological invariance within the framework of strata-dependent perversities, $\overline{p}$, which corresponds to the classical topological invariance if $\overline{p}$ is a GM-perversity. We also extend it to the tame intersection homology, a variation of the intersection homology, particularly suited for ``large'' perversities, if there is no singular strata on $X$ becoming regular in $X^*$. In particular, under the above conditions, the intersection homology and the tame intersection homology are invariant under a refinement of the stratification.

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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