Definition is_disp_nat_z_iso {DF: disp_functor F D D'} {DG: disp_functor G D D'} (α: nat_z_iso F G) (β: disp_nat_trans α DF DG) : UU := ∏ (c:C) (d:D c), is_z_iso_disp (nat_z_iso_pointwise_z_iso α c) (β c d).
Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Functors. Require Import UniMath.CategoryTheory.Core.NaturalTransformations. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.whiskering. Require Import UniMath.CategoryTheory.FunctorCategory. Require Import UniMath.CategoryTheory.DisplayedCats.Core. Require Import UniMath.CategoryTheory.DisplayedCats.Functors. Require Import UniMath.CategoryTheory.DisplayedCats.Isos.