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arXiv 2101.02791math.CTmath.AT
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$\infty$的左精确局部化-拓扑Ⅰ:高阶层

Left-exact Localizations of $\infty$-Topoi I: Higher Sheaves

Mathieu Anel, Georg Biedermann, Eric Finster, André Joyal

摘要:

我们正在开发工具,用于处理$\infty$ -topoi的任意左精确定位。本文引入了关于$\infty$ -拓扑$\mathscr{E}$中任意一组映射$Σ$的高阶层的概念.我们证明了高阶层$\mathrm{Sh}(\mathscr{E},Σ)$的满子范畴是一个$\infty$,层反射$\mathscr{E}\to \mathrm{Sh}(\mathscr{E},Σ)$是由$Σ$生成的左精确局部化.证明依赖于同余的概念,它是1-topos理论中Grothendieck拓扑概念的替代。

英文摘要:

We are developing tools for working with arbitrary left-exact localizations of $\infty$-topoi. We introduce a notion of higher sheaf with respect to an arbitrary set of maps $Σ$ in an $\infty$-topos $\mathscr{E}$. We show that the full subcategory of higher sheaves $\mathrm{Sh}(\mathscr{E},Σ)$ is an $\infty$-topos, and that the sheaf reflection $\mathscr{E}\to \mathrm{Sh}(\mathscr{E},Σ)$ is the left-exact localization generated by $Σ$. The proof depends on the notion of congruence, which is a substitute for the notion of Grothendieck topology in 1-topos theory.

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