gcchou@sdrc.UUCP (jin chou) (09/12/89)
I need _ROBUST METHODS_ to solve quartic polynomial equations of the form: A X**4 + B X**3 + C X**2 + D X + E = 0. Any implementation experience is also welcome. Note that DIRECT use of the close form formula does not satisfy the robustness requirement. I recall that this question was posted a couple of years ago and led to a lengthy discussion. I do not want to restart the discussion again. So please respond to me directly. Thank you in advance. Jin Chou (uunet!sdrc!gcchou)