Geodesic
Discrete Double Fibrations
Theory and applications of categories, Tome 37 (2021), pp. 671-708 Cet article a éte moissonné depuis la source Theory and Applications of Categories website

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Presheaves on a small category are well-known to correspond via a category of elements construction to ordinary discrete fibrations over that same small category. Work of R. Paré proposes that presheaves on a small double category are certain lax functors valued in the double category of sets with spans. This paper isolates the discrete fibration concept corresponding to this presheaf notion and shows that the category of elements construction introduced by Paré leads to an equivalence of virtual double categories.

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Classification : 18N10, 18N25
Keywords: double categories, lax functors, discrete fibrations, virtual equipments, monoids and modules 
@article{TAC_2021_37_a21,
     author = {Michael Lambert},
     title = {Discrete {Double} {Fibrations}},
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     year = {2021},
     volume = {37},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/TAC_2021_37_a21/}
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Michael Lambert. Discrete Double Fibrations. Theory and applications of categories, Tome 37 (2021), pp. 671-708. http://geodesic.mathdoc.fr/item/TAC_2021_37_a21/