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# numpy.polynomial.polynomial.Polynomial.deriv

`Polynomial.``deriv`(m=1)

  Differentiate.

  Return an instance of Polynomial that is the derivative of the current series. Refer to `polyder` for full documentation.

  Parameters : | m : non-negative int The number of integrations to perform.
  Returns : | derivative : Polynomial The derivative of the series using the same domain.

  See also

  `polyder`
    similar function.
  `polyint`
    similar function for integration.