fact: Definition nat_z_iso_fix_fst_arg: nat_z_iso (functor_fix_fst_arg C D E F c) (functor_fix_fst_arg C D E F' c) := make_nat_z_iso _ _ nattrans nat_z_iso_fix_fst_arg_ax.
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