The Poly class in polynomial.py has been streamlined and enchanced a bit, if anyone following this thread is curious: http://www.inetarena.com/~pdx4d/ocn/python/polynomial.html or .py for cut and pastable source Thanks to Brian Harvey on k12.ed.math for sharing his good ideas ( http://www.mathforum.com/epigone/k12.ed.math/blunpharthah ) Kirby