fact: Definition isaprop_is_nat_z_iso {C D : category} {F G : C ⟶ D} (α : nat_trans_data F G) : isaprop (is_nat_z_iso α).
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.TransportMorphisms UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.Univalence