∀ (M : Type u_1) (α : Type u_2) [inst : AddGroup M] [inst_1 : AddAction M α] [AddAction.IsPretransitive M α] {n : ℕ},
  1 ≤ n →
    ∀ {a : α},
      AddAction.IsMultiplyPreprimitive M α n.succ ↔
        AddAction.IsMultiplyPreprimitive (↥(AddAction.stabilizer M a)) (↥(SubAddAction.ofStabilizer M a)) n