∀ {A : Type u_1} {σ : Type u_2} [inst : CommRing A] [inst_1 : SetLike σ A] [inst_2 : AddSubmonoidClass σ A] (𝒜 : ℕ → σ)
  [inst_3 : GradedRing 𝒜] (r : A), ∃ y, ProjectiveSpectrum.zeroLocus 𝒜 y = {x | r ∉ x.asHomogeneousIdeal}ᶜ