fact: Definition from_matrix {C:category} {I} {d:I -> ob C} (D:Product d) {J} {b:J -> ob C} (B:Sum b) : weq (∏ i j, Hom C (b j) (d i)) (Hom C (universalObject B) (universalObject D)).
imports: UniMath.Foundations.Sets UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.RepresentableFunctors.Representation UniMath.CategoryTheory.RepresentableFunctors.Precategories