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arXiv 2603.20140math.ATmath.CT
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树状对象及其同伦论

Arboreal Objects and Their Homotopy Theory

Istanbul Technical University(伊斯坦布尔理工大学)

Atabey Kaygun

AI总结:

本文构建了树状扩展的范畴OrdFor,并展示其与半单纯同调的关系,通过右伴随扩展得到同伦等价。

摘要:

本文构建了树状扩展的范畴OrdFor,并展示其与半单纯同调的关系,通过右伴随扩展得到同伦等价。

英文摘要:

We construct a category $\OrdFor$ as an arboreal extension of $Δ_{\mathrm{epi}}\subseteqΔ$, whose morphisms are ordered forests composed by grafting. We define a full functor $π\colon \OrdFor\toΔ_{\mathrm{epi}}^{op}$ extracting the semisimplicial shadow. For every complete category $\mathcal C$, this induces a fully faithful functor from semisimplicial objects in $\mathcal C$ to $\mathcal C$-valued presheaves on $\OrdFor$, with right adjoint given by right Kan extension. We show that if weak equivalences of arboreal objects are detected by this right adjoint, then their Gabriel--Zisman localization is equivalent to that of semisimplicial objects. For bicomplete cofibrantly generated model categories, under the usual acyclicity hypothesis for right-induced transfer, the corresponding model structure on arboreal objects is Quillen equivalent to the Reedy model structure on semisimplicial objects.

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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