fact: Definition comma_cone : UU := ∑ (p : B) (π₁ : p --> b₁) (π₂ : p --> b₂), π₁ · f ==> π₂ · g.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Univalence