proposition: Lemma yoneda_map_2_1 (C : category) (c : C) (F : functor C^op HSET) (x : pr1 (F c)) : yoneda_map_1 _ _ _ (yoneda_map_2 _ _ _ x) = x.
proof: Proof. simpl. rewrite (functor_id F). apply idpath. Qed.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.FunctorCategory UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Categories.HSET.Core UniMath.CategoryTheory.Categories.HSET.MonoEpiIso UniMath.CategoryTheory.whiskering