is a Hermite series (without having to "reproject" the result onto
    the basis set) so addition, just like that of "standard" polynomials,
    is simply "component-wise."

    Examples
    --------
    >>> from numpy.polynomial.hermite_e import hermeadd
    >>> hermeadd([1, 2, 3], [1, 2, 3, 4])
    array([2.,  4.,  6.,  4.])

    )