∀ {C : Type u₁} [inst : CategoryTheory.Category.{v₁, u₁} C] {V : Type u₂} [inst_1 : CategoryTheory.Category.{v₂, u₂} V]
  [inst_2 : CategoryTheory.MonoidalCategory C] [inst_3 : CategoryTheory.MonoidalCategory V]
  (F G : CategoryTheory.Functor C V) [inst_4 : CategoryTheory.MonoidalCategory.DayConvolution F G] {x x' y y' : C}
  (f : x ⟶ x') (g : y ⟶ y'),
  CategoryTheory.CategoryStruct.comp (CategoryTheory.MonoidalCategoryStruct.tensorHom (F.map f) (G.map g))
      ((CategoryTheory.MonoidalCategory.DayConvolution.unit F G).app (x', y')) =
    CategoryTheory.CategoryStruct.comp ((CategoryTheory.MonoidalCategory.DayConvolution.unit F G).app (x, y))
      ((CategoryTheory.MonoidalCategory.DayConvolution.convolution F G).map
        (CategoryTheory.MonoidalCategoryStruct.tensorHom f g))