∀ {X Y Z : AlgebraicGeometry.Scheme} (f : X ⟶ Y) (g : Y ⟶ Z),
  CategoryTheory.CategoryStruct.comp (AlgebraicGeometry.Scheme.Hom.toLRSHom f)
      (AlgebraicGeometry.Scheme.Hom.toLRSHom g) =
    AlgebraicGeometry.Scheme.Hom.toLRSHom (CategoryTheory.CategoryStruct.comp f g)