fact: Definition is_universal_arrow_from {D C : category} (S : functor D C) (c : C) (r : D) (v : C⟦S r, c⟧) : UU := ∏ (d : D) (f : C⟦S d,c⟧), ∃! (f' : D⟦d,r⟧), f = # S f' · v.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Epis UniMath.CategoryTheory.Epis UniMath.CategoryTheory.SplitMonicsAndEpis UniMath.CategoryTheory.Monics UniMath.CategoryTheory.FunctorCategory UniMath.CategoryTheory.whiskering