proposition: Lemma nat_z_iso_fix_fst_arg_ax: is_nat_z_iso (nat_trans_fix_fst_arg _ _ _ _ _ α c).
proof: Proof. intro d. use (pr2_nat_z_iso α). Defined.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.FunctorCategory UniMath.CategoryTheory.opp_precat