纤维化的范畴论概念
范畴论
2020-06-02 v2
摘要
由 Grothendieck 引入范畴论的范畴 上的纤维化编码了伪函子 ,而离散纤维化的特例编码了预层 。一种双侧离散变体编码了函子 ,其也被称为从 到 的 profunctor(函子子)。根据 Street 的工作,所有这些纤维化概念都可以在任意 2-范畴或双范畴内部定义。虽然双侧离散纤维化在 内部建模 profunctor,但出乎意料的是,要对 -profunctor 在 - 内部建模,必须使用对偶的双侧余离散余纤维化。
引用
@article{arxiv.1806.06129,
title = {Categorical notions of fibration},
author = {Fosco Loregian and Emily Riehl},
journal= {arXiv preprint arXiv:1806.06129},
year = {2020}
}
备注
These notes were initially written by the second-named author to accompany a talk given in the Algebraic Topology and Category Theory Proseminar in the fall of 2010 at the University of Chicago. A few years later, the now first-named author joined to expand and improve in minor ways the exposition. To appear on "Expositiones Mathematicae"