{K : Type u_1} →
  [inst : Field K] →
    {ζ : K} →
      {hζ : IsPrimitiveRoot ζ 3} →
        FermatLastTheoremForThreeGen.Solution✝ hζ →
          [inst_1 : NumberField K] → [IsCyclotomicExtension {3} ℚ K] → (NumberField.RingOfIntegers K)ˣ