∀ {R : Type u_2} {A : Type u_3} [inst : CommSemiring R] [inst_1 : Semiring A] [inst_2 : Algebra R A]
  (S : Subalgebra R A) (a : (↥S.op)ᵐᵒᵖ), ↑(S.algEquivOpMop.symm a) = MulOpposite.unop ↑(MulOpposite.unop a)