proposition: Lemma transport_compose {C : precategory} {x y z w : ob C} (f : x --> y) (g : z --> w) (e : y = z) : transportf (precategory_morphisms x) e f · g = f · transportf (λ x' : ob C, precategory_morphisms x' w) (! e) g.
proof: Proof. induction e. apply idpath. Qed.
imports: UniMath.Foundations.PartA UniMath.Foundations.UnivalenceAxiom UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos