∀ {σ : Type u_1} {A : Type u} [inst : CommRing A] [inst_1 : SetLike σ A] [inst_2 : AddSubgroupClass σ A] (𝒜 : ℕ → σ)
  [inst_3 : GradedRing 𝒜] (f : A) {m : ℕ} (f_deg : f ∈ 𝒜 m) (hm : 0 < m),
  (AlgebraicGeometry.Proj.basicOpenIsoAway 𝒜 f f_deg hm).hom = AlgebraicGeometry.Proj.awayToSection 𝒜 f