Definition sqq {C: predoublecategory_ob_mor_sq_data} {a b c d : C} (f: a -h-> b) (g: a -v-> c) (h: b -v-> d) (k: c -h-> d): UU := get_predoublecat_sq C a b c d f g h k.
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.