{α : Type u_1} →
  [inst : Field α] →
    [inst_1 : LinearOrder α] →
      [inst_2 : IsStrictOrderedRing α] →
        {β : Type u_2} →
          [inst_3 : Ring β] → {abv : β → α} → [inst_4 : IsAbsoluteValue abv] → One (CauSeq.Completion.Cauchy abv)