proposition: Lemma iso_yoneda_binproducts : iso (yon (BinProductObject _ (PC X Y))) (BinProductObject (PreShv _) (BinProducts_PreShv (yon X) (yon Y))).
proof: Proof. use make_iso. - use yon_binprod_nat_trans. - use yon_binprod_is_iso. Defined.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Limits.BinProducts UniMath.CategoryTheory.Presheaf UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.Categories.HSET.Core UniMath.CategoryTheory.yoneda