∀ (S : Type u_1) {R : Type u_2} {A : Type u_3} [inst : CommSemiring R] [inst_1 : CommSemiring S] [inst_2 : Ring A]
  [inst_3 : Algebra R S] [inst_4 : Algebra R A] [inst_5 : Algebra S A] [IsScalarTower R S A] {a : A},
  ⇑(algebraMap R S) ⁻¹' spectrum S a = spectrum R a