proposition: Proposition uwhisker_id_v_square {x y : B} {h k : x --> y} (τ : h ==> k) : τ ▵s id_v_square_bicat k = τ ▿s id_v_square_bicat h.
proof: Proof. exact (pr2 (pr122 (pr222 (pr12 B))) _ _ _ _ τ). Defined.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.Bicategories.Core.Bicat