Voir la notice de l'article provenant de la source Theory and Applications of Categories website
Various concerns suggest looking for internal co-categories in categories with strong logical structure. It turns out that in any coherent category E, all co-categories are co-equivalence relations.
@article{TAC_2011_25_a8, author = {Peter LeFanu Lumsdaine}, title = {A small observation on co-categories}, journal = {Theory and applications of categories}, pages = {247--250}, publisher = {mathdoc}, volume = {25}, year = {2011}, language = {en}, url = {http://geodesic.mathdoc.fr/item/TAC_2011_25_a8/} }
Peter LeFanu Lumsdaine. A small observation on co-categories. Theory and applications of categories, Tome 25 (2011), pp. 247-250. http://geodesic.mathdoc.fr/item/TAC_2011_25_a8/