Bipullbacks of fractions and the snail lemma
- Authors: Jacqmin, P.; Mantovani, S.; Metere, G.; Vitale, E.
- Publication year: 2019
- Type: Articolo in rivista
- OA Link: http://hdl.handle.net/10447/367250
We establish conditions giving the existence of bipullbacks in bicategories of fractions. We apply our results to construct a π0-π1 exact sequence associated with a fractor between groupoids internal to a pointed exact category