∀ {G : Type u_2} [inst : CommGroup G] {g : G} (hg : ∀ (x : G), x ∈ Subgroup.zpowers g) (G' : Type u_1)
  [inst_1 : CommGroup G'] (φ : ↥(rootsOfUnity (Nat.card G) G')), ⋯.unit ∈ rootsOfUnity (Nat.card G) G'