∀ (R : Type u) [inst : CommRing R] [IsDomain R] (L : Type u) [inst_2 : CommRing L] [inst_3 : IsDomain L]
  [inst_4 : Algebra R L] [Module.IsTorsionFree R L] [Algebra.IsAlgebraic R L],
  Cardinal.mk L ≤ Cardinal.mk ((p : Polynomial R) × { x // x ∈ p.aroots L })