∀ {R : CommRingCat} (x : PrimeSpectrum ↑R) {Z : CommRingCat} (h : (AlgebraicGeometry.Spec R).presheaf.stalk x ⟶ Z),
  CategoryTheory.CategoryStruct.comp (CommRingCat.ofHom (algebraMap (↑R) (Localization.AtPrime x.asIdeal)))
      (CategoryTheory.CategoryStruct.comp (AlgebraicGeometry.Spec.stalkIso R x).inv h) =
    CategoryTheory.CategoryStruct.comp (AlgebraicGeometry.Scheme.ΓSpecIso R).inv
      (CategoryTheory.CategoryStruct.comp ((AlgebraicGeometry.Spec R).presheaf.germ ⊤ x trivial) h)