Definition is_nat_z_iso {C D : precategory_data} {F G : functor_data C D} (μ : nat_trans_data F G) : UU := ∏ (c : C), is_z_isomorphism (μ c).
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.TransportMorphisms. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.Univalence.