proposition: Lemma lunitor_id_is_left_unit_id (X : C) : lunitor (id₁ X) = runitor (id₁ X).
proof: Proof. apply lunitor_runitor_identity. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.Bicategories.Core.Bicat UniMath.Bicategories.Core.Invertible_2cells UniMath.Bicategories.Core.Unitors