proposition: Lemma iso_comp_right_isweq {C : precategory_data} {a b : ob C} (h : iso a b) (c : C) : isweq (fun f : b --> c => h · f).
proof: Proof. apply (pr2 h _ ). Defined.
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories