中文

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 BB 上的纤维化编码了伪函子 BopCatB^{op} \rightsquigarrow {\bf Cat},而离散纤维化的特例编码了预层 BopSetB^{op} \to {\bf Set}。一种双侧离散变体编码了函子 Bop×ASetB^{op} \times A \to {\bf Set},其也被称为从 AABB 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 Cat{\bf Cat} 内部建模 profunctor,但出乎意料的是,要对 V\cal V-profunctor 在 V\cal V-Cat\bf Cat 内部建模,必须使用对偶的双侧余离散余纤维化。

关键词

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"