fact: Definition coprod_from_underlying_arr_map (f : I_{V} --> PV (λ j, E ⦃ D j , w ⦄)) : I_{V} --> E ⦃ a , w ⦄.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Monoidal.Categories UniMath.CategoryTheory.EnrichedCats.Enrichment UniMath.CategoryTheory.Limits.Products UniMath.CategoryTheory.Limits.Coproducts