∀ {n : Type u_2} [inst : DecidableEq n] [inst_1 : Fintype n] {R : Type u_1} [inst_2 : CommRing R],
  IsEmpty n → (↥⊥ ≃* ↥(rootsOfUnity (max (Fintype.card n) 1) R)) = (↥⊥ ≃* ↥(rootsOfUnity (max 0 1) R))