proposition: Proposition is_left_extension_extend_right {k : y --> z} (θ : f ==> g · k) : τ • (g ◃ is_left_extension_extend θ) = θ.
proof: Proof. exact (homotweqinvweq (make_weq _ (Hτ k)) θ). Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Examples.OpMorBicat UniMath.Bicategories.Core.Examples.OpCellBicat