proposition: Proposition idtoiso_core {C : category} {x y : C} (p : x = y) : pr11 (@idtoiso (core C) _ _ p) = pr1 (@idtoiso C _ _ p).
proof: Proof. induction p ; cbn. apply idpath. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Groupoids UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.PrecategoryBinProduct