∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] [inst_1 : CategoryTheory.MonoidalCategory C]
  [inst_2 : CategoryTheory.BraidedCategory C] (X : C),
  (β_ (CategoryTheory.MonoidalCategoryStruct.tensorUnit C) X).inv =
    CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.rightUnitor X).hom
      (CategoryTheory.MonoidalCategoryStruct.leftUnitor X).inv