Accurate Evaluation of Polynomials

Details Accurate Evaluation of Polynomials Accurate Evaluation of Polynomials

2008-05-21

arxiv.org/abs/0805.3194v1

Mathematics

Numerical Analysis

8 pages + 2 figures

Scientific paper

For a large class of polynomials, the standard method of polynomial evaluation, Horner's method, can be very inaccurate. The alternative method given here is on average 100 to 1000 times more accurate than Horner's Method. The number of floating point operations is twice that of Horner's method for a single evaluation. For repeated evaluations at nearby points, the number of floating point operations is only doubled for the first evaluation, and is the same as Horner's Method for all following evaluations. This new method is tested with random polynomials.

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