proposition: Proposition sym_mon_braiding_runitor (x : V) : sym_mon_braiding (I_{V}) x · mon_runitor x = mon_lunitor x.
proof: Proof. rewrite <- sym_mon_braiding_lunitor. rewrite !assoc. rewrite sym_mon_braiding_inv. apply id_left. Qed.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.Monoidal.WhiskeredBifunctors UniMath.CategoryTheory.Monoidal.Categories