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arXiv 2203.09133math.CTmath.RA
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幺半群作用的拓扑间的几何态射:因子分解系统

Geometric morphisms between toposes of monoid actions: factorization systems

Jens Hemelaer, Morgan Rogers

摘要:

设M,N是幺半群,PSh(M),PSh(N)是集合上右作用的范畴.本文系统地研究了几何态射PSh(M)$\rightarrow$ PSh(N)的性质与半群同态M $\rightarrow$ N或诱导它们的平坦左N右M-集的性质之间的对应关系.更具体地说,我们考虑了因子分解系统中的几何态射的性质,即:满射,包含,局部态射,超连通态射,终端连通态射,{é}tale态射,纯态射和完全散布。最后,我们应用拓扑理论的伽罗瓦论的特殊情况下的拓扑的形式PSh(M)。

英文摘要:

Let M, N be monoids, and PSh(M), PSh(N) their respective categories of right actions on sets. In this paper, we systematically investigate correspondences between properties of geometric morphisms PSh(M) $\rightarrow$ PSh(N) and properties of the semigroup homomorphisms M $\rightarrow$ N or flat-left-N-right-M-sets inducing them. More specifically, we consider properties of geometric morphisms featuring in factorization systems, namely: surjections, inclusions, localic morphisms, hyperconnected morphisms, terminal-connected morphisms, {é}tale morphisms, pure morphisms and complete spreads. We end with an application to topos-theoretic Galois theory to the special case of toposes of the form PSh(M).

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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