{P : Sort u} →
  {ringId : ℕ} →
    {checkCoeffDvd : Bool} →
      {ringId' : ℕ} →
        {checkCoeffDvd' : Bool} →
          { ringId := ringId, checkCoeffDvd := checkCoeffDvd } =
              { ringId := ringId', checkCoeffDvd := checkCoeffDvd' } →
            (ringId = ringId' → checkCoeffDvd = checkCoeffDvd' → P) → P