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# numpy.polynomial.hermite_e.hermemulx

`numpy.polynomial.hermite_e.``hermemulx`(c)

  Multiply a Hermite series by x.

  Multiply the Hermite series c by x, where x is the independent variable.

  Parameters : | c : array_like 1-D array of Hermite series coefficients ordered from low to high.
  Returns : | out : ndarray Array representing the result of the multiplication.

  Notes

  The multiplication uses the recursion relationship for Hermite polynomials in the form

  xP_i(x) = (P_{i + 1}(x) + iP_{i - 1}(x)))

  Examples

      >>> from numpy.polynomial.hermite_e import hermemulx
      >>> hermemulx([1, 2, 3])
      array([ 2.,  7.,  2.,  3.])