∀ {J : Type u_3} [inst : CategoryTheory.Category.{u_2, u_3} J] (F : CategoryTheory.Functor J RingCat)
  {a b : (j : J) → ↑((F.comp (CategoryTheory.forget₂ RingCat SemiRingCat)).obj j)},
  a ∈ (SemiRingCat.sectionsSubsemiring (F.comp (CategoryTheory.forget₂ RingCat SemiRingCat))).carrier →
    b ∈ (SemiRingCat.sectionsSubsemiring (F.comp (CategoryTheory.forget₂ RingCat SemiRingCat))).carrier →
      a * b ∈ (SemiRingCat.sectionsSubsemiring (F.comp (CategoryTheory.forget₂ RingCat SemiRingCat))).carrier