proposition: Lemma opp_opp_precat_ob_mor_compute (C : precategory_ob_mor) : idpath _ = maponpaths precategory_id_comp (opp_opp_precat_ob_mor C).
proof: Proof. reflexivity. Defined.
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