Commit 2022-05-02 13:45 52a454af

View on Github →

feat(category_theory/limits): pushouts and pullbacks in the opposite category (#13495) This PR adds duality isomorphisms for the categories wide_pushout_shape, wide_pullback_shape, walking_span, walking_cospan and produce pullbacks/pushouts in the opposite category when pushouts/pullbacks exist.

Estimated changes