∀ {R : Type u_1} {A : Type u_2} [inst : CommSemiring R] [inst_1 : Semiring A] [inst_2 : Algebra R A]
  [inst_3 : TopologicalSpace A] [IsTopologicalSemiring A] (p : Polynomial R) {a : A},
  ContinuousAt (fun x => (Polynomial.aeval x) p) a