proposition: Proposition make_profunctor_square_law : profunctor_nat_trans_law make_profunctor_square_data.
proof: Proof. intros y₁ y₂ x₁ x₂ g f h ; cbn -[lmap rmap]. rewrite lmap_precomp_profunctor, rmap_precomp_profunctor. apply Hτ. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.Categories.HSET.All UniMath.CategoryTheory.Categories.HSET.SetCoends UniMath.CategoryTheory.Profunctors.Core UniMath.CategoryTheory.Profunctors.Examples UniMath.CategoryTheory.Profunctors.Transformation