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arXiv 1905.03310math.AGmath.ATmath.NT
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$\overline{Spec\mathbb Z}$和Gromov规范

$\overline{Spec\mathbb Z}$ and the Gromov norm

Alain Connes, Caterina Consani

摘要:

定义了系数在Segal $Γ$ -集($\mathbf S$ -模)中的单纯集的同调.我们显示的相关性,这个新的同源性与价值观的$\mathbf S$ -模块证明,作为系数的$\mathbf S$ -模块在阿基米德的地方在结构层上的$\overline{Spec\mathbb Z}$在我们以前的工作中介绍,一个获得的奇异同调与真正的系数的拓扑空间$X$,规范等价于Gromov规范。证明了当$X$是定向紧Riemann曲面时,这两个范数是一致的.

英文摘要:

We define the homology of a simplicial set with coefficients in a Segal's $Γ$-set ($\mathbf S$-module). We show the relevance of this new homology with values in $\mathbf S$-modules by proving that taking as coefficients the $\mathbf S$-modules at the archimedean place over the structure sheaf on $\overline{Spec\mathbb Z}$ introduced in our previous work, one obtains on the singular homology with real coefficients of a topological space $X$, a norm equivalent to the Gromov norm. Moreover, we prove that the two norms agree when $X$ is an oriented compact Riemann surface.

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