proposition: Lemma nat_trans_eq_alt {C C' : category} (F F' : functor C C') (a a' : nat_trans F F'): (∏ x, a x = a' x) -> a = a'.
proof: Proof. apply nat_trans_eq. apply homset_property. Qed.
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