Definition ver_associator { C:predoublecategory_sq_hor_ver_data} {a b c d: C} (f : a -v-> b) (g : b -v-> c) (h : c -v-> d) := sqq_iso_special (f ·v (g ·v h)) ((f ·v g) ·v h).
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.