Definition vassocl {a b : C} {f g h k : C⟦a, b⟧} (x : f ==> g) (y : g ==> h) (z : h ==> k) : (x • y) • z = x • (y • z) := !(vassocr _ _ _).
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.CategoryTheory.Core.Categories. Require Import UniMath.CategoryTheory.Core.Setcategories. Require Import UniMath.CategoryTheory.Core.Univalence.