Maurice Lombardi wrote:
Also, as I said, I can't see why there should be large rounding errors.
Mmm. I may have spoken too fast. Rounding errors are a plague in large degree polynomials of alternating signs, if terms (coeff * x^n) are of same order of magnitude. This should not occur for an absolutely convergent series, where the higher degree terms are small, if summed from higher to lower degree.
That's what I meant (I forgot to mention this in my argumentation).
Frank