proposition: Proposition rinvunitor_h_linvunitor_h {C : double_cat} (x : C) : linvunitor_h (identity_h x) = rinvunitor_h (identity_h x).
proof: Proof. rewrite linvunitor_h_rinvunitor_h. apply idpath. Qed.
imports: UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Prelude UniMath.CategoryTheory.TwoSidedDisplayedCats.TwoSidedDispCat UniMath.CategoryTheory.TwoSidedDisplayedCats.Univalence UniMath.Bicategories.Core.Bicat UniMath.Bicategories.DoubleCategories.Core.DoubleCats UniMath.Bicategories.DoubleCategories.DerivedLaws.TransportLaws UniMath.Bicategories.DoubleCategories.DerivedLaws.Variations