fact: Definition functor_from_opp_to_opp_opp (A C : precategory) (hsC : has_homsets C) : functor [A, C, hsC]^op [A^op, C^op, has_homsets_opp hsC] := tpair _ _ (is_functor_from_opp_to_opp_opp A C hsC).
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.FunctorCategory