fact: Definition ProdCone {a b c : C} (ca : C⟦c,a⟧) (cb : C⟦c,b⟧) : cone (binproduct_diagram a b) c.
imports: UniMath.Foundations.PartD UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Limits.Graphs.Colimits UniMath.CategoryTheory.Limits.Graphs.Limits