∀ {A : Type u_1} {σ : Type u_2} [inst : CommRing A] [inst_1 : SetLike σ A] [inst_2 : AddSubgroupClass σ A] (𝒜 : ℕ → σ)
  [inst_3 : GradedRing 𝒜] (f : A) (x : ↥(Opposite.unop (Opposite.op (ProjectiveSpectrum.basicOpen 𝒜 f)))),
  (↑x).asHomogeneousIdeal.toIdeal.IsPrime