numpy.subtract(x1, x2[, out]) = Subtract arguments, element-wise.

numpy.polynomial.chebyshev.chebadd(c1, c2)

numpy.npv(rate, values)

Legendre.convert(domain=None, kind=None, window=None)

numpy.sinc(x)

numpy.polynomial.hermite.hermzero = array([0])

chararray.swapaxes(axis1, axis2) Return a view of the array with axis1 and axis2

numpy.ma.make_mask(m, copy=False, shrink=True, dtype=)

numpy.reciprocal(x[, out]) = Return the reciprocal of the argument, element-wise. Calculates 1/x.

numpy.promote_types(type1, type2) Returns the data type with the smallest size and smallest scalar kind to which both type1