Definition preserves_is_left_extension_weq_preserves_is_right_extension_co {B : bicat} {x y z a : B} {f : x --> z} {g : x --> y} (k : z --> a) {h : y --> z} {τ : g · h ==> f} (Hτ : is_right_extension f g τ) : preserves_is_right_extension k Hτ ≃ @preserves_is_left_extension (op2_bicat B) _ _ _ _ _ _ k _ _ Hτ. Proof. exact (idweq _). Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Examples.OpMorBicat. Require Import UniMath.Bicategories.Core.Examples.OpCellBicat.