proposition: Theorem functorBinarySum {B C:category} : BinarySums C -> BinarySums [B,C].
proof: Proof. intros sum F G. exact (isomorphismRepresentability (functorBinaryProduct (binarySumsToProducts sum) (functorOp F) (functorOp G)) functorOpIso (HomPairOp F G)). Defined.
imports: UniMath.Foundations.Preamble UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.opp_precat UniMath.CategoryTheory.yoneda UniMath.CategoryTheory.Categories.HSET.Core UniMath.CategoryTheory.Categories.HSET.MonoEpiIso UniMath.CategoryTheory.RepresentableFunctors.Bifunctor UniMath.CategoryTheory.RepresentableFunctors.Precategories UniMath.MoreFoundations.Tactics