Definition invertible_between_cartesians : invertible_2cell g₀ g₁. Proof. use make_invertible_2cell. - exact φ. - use make_is_invertible_2cell. + exact ψ. + exact invertible_between_cartesians_inv₁. + exact invertible_between_cartesians_inv₂. 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.DisplayedCats.StreetFibration. Require Import UniMath.Bicategories.Core.Bicat. Import Bicat.Notations. Require Import UniMath.Bicategories.Core.Invertible_2cells. Require Import UniMath.Bicategories.Core.Univalence.