∀ {R : Type u} {S : Type v} {A : Type w} [inst : Semifield R] [inst_1 : StarRing R] [inst_2 : TopologicalSpace R]
  [inst_3 : IsTopologicalSemiring R] [inst_4 : ContinuousStar R] [inst_5 : Semifield S] [inst_6 : StarRing S]
  [inst_7 : TopologicalSpace S] [inst_8 : IsTopologicalSemiring S] [inst_9 : ContinuousStar S] [inst_10 : Ring A]
  [inst_11 : StarRing A] [inst_12 : Algebra R S] [inst_13 : Algebra R A] [inst_14 : Algebra S A]
  [inst_15 : IsScalarTower R S A] [inst_16 : StarModule R S] [inst_17 : ContinuousSMul R S] {a : A}
  (φ : C(↑(spectrum S a), S) →⋆ₐ[S] A) {f : C(S, R)} (h : SpectrumRestricts a ⇑f) (a_1 : C(↑(spectrum R a), R)),
  (SpectrumRestricts.starAlgHom φ h) a_1 =
    φ
      ({ toFun := ⇑(StarAlgHom.ofId R S), continuous_toFun := ⋯ }.comp
        (a_1.comp { toFun := Subtype.map ⇑f ⋯, continuous_toFun := ⋯ }))