Definition compose {C : precategory_data} { a b c : C } : a --> b -> b --> c -> a --> c := pr2 (pr2 C) a b c.
Require Import UniMath.Foundations.Propositions. Require Import UniMath.Foundations.Sets. Require Import UniMath.MoreFoundations.PartA. Require Import UniMath.MoreFoundations.Notations.