笛卡尔2-纤维化的模型结构
A model structure for cartesian 2-fibrations
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中文总结 AI 辅助
本文通过带标记2-范畴构造模型结构,使纤维对象恰为笛卡尔2-纤维化,并证明带标记Grothendieck构造将其等同于严格2-函子,同时构造同时反转态射和2-胞腔的局部化。
中文摘要 AI 辅助
笛卡尔2-纤维化提供了一种理解索引范畴的方式,但其经典的“伸直”构造需要多层弱相干数据。本文发展了一个同伦论框架,用完全严格模型取代了大部分簿记工作。通过使用带标记的2-范畴来记录笛卡尔态射和2-胞腔,我们构造了一个模型结构,其纤维对象恰好是固定2-范畴$\mathcal{C}$上的笛卡尔2-纤维化。然后我们证明,带标记的Grothendieck构造将这些2-纤维化(在弱等价意义下)等同于从$\mathcal{C}$到$2\mathrm{Cat}$的严格2-函子。作为额外贡献,我们构造了2-范畴的局部化,同时反转选定的态射和2-胞腔。
英文摘要
Cartesian 2-fibrations provide a way to understand indexed categories, but their classical ``straightening'' construction requires several layers of weak coherence data. This paper develops a homotopical framework that replaces much of this bookkeeping with a fully strict model. By using marked 2-categories to record the cartesian morphisms and 2-cells, we construct a model structure whose fibrant objects are precisely the cartesian 2-fibrations over a fixed 2-category $\mathcal{C}$. We then show that the marked Grothendieck construction identifies these 2-fibrations, up to weak equivalence, with strict 2-functors from $\mathcal{C}$ into $2\mathrm{Cat}$. As an additional contribution, we construct localizations of 2-categories that simultaneously invert selected morphisms and 2-cells.
发表机构
- Johns Hopkins University(约翰斯·霍普金斯大学)
- University of Hamburg(汉堡大学)
- University of Minnesota(明尼苏达大学)
- Dalhousie University(达尔豪斯大学)
- Univ. Artois, UR 2462 , Laboratoire de Mathématiques de Lens (LML)(阿图瓦大学,UR 2462,伦斯数学实验室 (LML))
- Max Planck Institute for Mathematics(马克斯·普朗克数学研究所)
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