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arXiv 0810.4531math.AT
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多项式上同调代数空间的loop上同调

The loop cohomology of a space with the polynomial cohomology algebra

Samson Saneblidze

摘要:

给定一个单连通空间$X$,其上同调$H^*(X;{\mathbb Z}_2)$为多项式,利用Steenrod上同调运算$Sq_1$在$H^*(X;{\mathbb Z}_2).$上的作用,计算了环上同调代数$H^*(ΩX;{\mathbb Z}_2)$,从而得到$H^*(ΩX;{\mathbb Z}_2)$是外代数当且仅当$Sq_1$在$H^{\ast}(X;{\mathbb Z}_2).$上可乘分解。博雷尔

英文摘要:

Given a simply connected space $X$ with the cohomology $H^*(X;{\mathbb Z}_2)$ to be polynomial, we calculate the loop cohomology algebra $H^*(ΩX;{\mathbb Z}_2)$ by means of the action of the Steenrod cohomology operation $Sq_1$ on $H^*(X;{\mathbb Z}_2).$ As a consequence we obtain that $H^*(ΩX;{\mathbb Z}_2)$ is the exterior algebra if and only if $Sq_1$ is multiplicatively decomposable on $H^{\ast}(X;{\mathbb Z}_2).$ The last statement in fact contains a converse of a theorem of A. Borel.

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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