The identity type weak factorisation system
Logic
2008-11-10 v2 Category Theory
Abstract
We show that the classifying category C(T) of a dependent type theory T with axioms for identity types admits a non-trivial weak factorisation system. We provide an explicit characterisation of the elements of both the left class and the right class of the weak factorisation system. This characterisation is applied to relate identity types and the homotopy theory of groupoids.
Cite
@article{arxiv.0803.4349,
title = {The identity type weak factorisation system},
author = {Nicola Gambino and Richard Garner},
journal= {arXiv preprint arXiv:0803.4349},
year = {2008}
}
Comments
25 pages; accepted for publication in Theoretical Computer Science