Definition pb_1cell_pr2 {p q : pb_cone} (φ : pb_1cell p q) : invertible_2cell (φ · pb_cone_pr2 q) (pb_cone_pr2 p) := pr122 φ.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Invertible_2cells. Require Import UniMath.Bicategories.Core.Univalence.