Definition z_iso_disp {C : precategory} {D : disp_cat_data C} {x y : C} (f : z_iso x y) (xx : D x) (yy : D y) := ∑ ff : xx -->[f] yy, is_z_iso_disp f ff.
Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Isos. Require Import UniMath.CategoryTheory.Core.Univalence. Require Import UniMath.CategoryTheory.DisplayedCats.Core.