bicategories of fractions; weak fiber products; weak pullbacks; stacks
Abstract :
[en] We fix any pair (C,W) consisting of a bicategory and a class of morphisms in it, admitting a bicalculus of fractions, i.e. a “localization” of C with respect to the class W. In the resulting bicategory of fractions, we identify necessary and sufficient conditions for the existence of weak fiber products.
Disciplines :
Mathematics
Author, co-author :
Tommasini, Matteo ; University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Mathematics Research Unit
