fact: Definition make_is_z_isomorphism {C : precategory_data} {a b : C} (f : a --> b) (g : b --> a) (H : is_inverse_in_precat f g) : is_z_isomorphism f := (g,,H).
imports: UniMath.Foundations.PartA UniMath.Foundations.Propositions UniMath.Foundations.Sets UniMath.MoreFoundations.Tactics UniMath.CategoryTheory.Core.Categories