∀ {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},
  RingHomClass (HomogeneousLocalization.Away 𝒜 f →+* Localization.Away f) (HomogeneousLocalization.Away 𝒜 f)
    (Localization.Away f)