Definition lwhisker_of_invertible_2cell {B : bicat} {x y z : B} (f : x --> y) {g₁ g₂ : y --> z} (α : invertible_2cell g₁ g₂) : invertible_2cell (f · g₁) (f · g₂). Proof. use make_invertible_2cell. - exact (f ◃ α). - is_iso. apply α. Defined.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations.