∀ (M : Type u_2) [inst : CommMonoid M] [inst_1 : Fintype M] [inst_2 : DecidableEq M] (R : Type u_1)
  [inst_3 : CommMonoidWithZero R] (ζ : ↥(rootsOfUnity (Fintype.card Mˣ) R)), ↑ζ ∈ rootsOfUnity (Fintype.card Mˣ) R