Definition inv2cell_to_z_iso_isweq {a b : B} (f g : hom a b) : isweq (@inv2cell_to_z_iso _ _ f g). Proof. use isweq_iso. - exact z_iso_to_inv2cell. - abstract (intro i ; apply cell_from_invertible_2cell_eq ; apply idpath). - abstract (intro i ; apply z_iso_eq ; apply idpath). 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.