Definition und_ver_cat_id (C: predoublecategory_hor_sq) : ∏ c : und_ver_cat_ob C, und_ver_cat_ob_mor C c c := fun c => get_und_ver_cat_id c.
Require Import UniMath.Foundations.Propositions. Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.MoreFoundations.Notations. Require Import UniMath.CategoryTheory.Core.Prelude. Require Import UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat. Require Import UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence.