Spahn factorization system (Rev #2)

Definition

Let $C$ be a category. A $k$ -ary factorization system in $C$ is defined to be a (ordered) list $(L_1,R_1),\dots,(L_{k-1},R_{k-1})$ of (orthogonal) factorization systems such that $R_i\supset R_{i+1}$ (or equivalently $L_{i+1}\subseteq L_i$ ).

This is equivalent: Every $C$ -morphism $f$ factors as $f=f_1;f_2;\dots;f_k$ with $f_i\in R_i\cap L_{i-1}$

Reflective factorization system

Relation of reflective subcategories and reflective subfibrations

Cooperads

Modalities

Examples

Factorization systems in cohesive toposes

pi-factorization systems

References

Cassidy and Hébert and Kelly?, “Reflective subcategories, localizations, and factorization systems”. J. Austral. Math Soc. (Series A) 38 (1985), 287–329 (pdf)

Carboni and Janelidze? and Kelly? and Paré, “On localization and stabilization for factorization systems”, Appl. Categ. Structures 5 (1997), 1–58

Mike Shulman, internalizing the external - the joy of codiscreteness, blog
J. M. E. Hyland, 27.11.2012, Classical lambda calculus in modern dress, arXiv:1211.5762
UF-IAS-2012, Modal type theory, wiki

Revision on December 1, 2012 at 20:15:50 by Stephan Alexander Spahn?. See the history of this page for a list of all contributions to it.