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arXiv 2105.04751math.AT
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simply connected CW配合物有理化的形式性

Formality on rationalizations of simply connected CW complexes

Jingwen Gao, Xiugui Liu

摘要:

本文证明了:对于具有有限维$H^{*}(Y;\mathbb{Q})$的单连通CW复$Y$,如果$H^{*}(Y;\mathbb{Q})$集中在度$\leq 3$上,则有理化$Y_\mathbb{Q}$是形式的.作为应用,我们证明了有理同调集中在度$\leq 3$上的单连通Sullivan代数的空间实现是形式化的.

英文摘要:

In this paper, we show that for a simply connected CW complex $Y$ with $H^{*}(Y;\mathbb{Q})$ of finite dimension, if $H^{*}(Y;\mathbb{Q})$ is concentrated in degrees $\leq 3$, then the rationalization $Y_\mathbb{Q}$ is formal. As an application, we show that the spatial realizations of simply connected Sullivan algebras with rational homology concentrated in degrees $\leq 3$ are formal.

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