A Curious Case of Curbed Condition
Numerical Analysis
2018-08-22 v1 Computational Geometry
Abstract
In computer aided geometric design a polynomial is usually represented in Bernstein form. The de Casteljau algorithm is the most well-known algorithm for evaluating a polynomial in this form. Evaluation via the de Casteljau algorithm has relative forward error proportional to the condition number of evaluation. However, for a particular family of polynomials, a curious phenomenon occurs: the observed error is much smaller than the expected error bound. We examine this family and prove a much stronger error bound than the one that applies to the general case. Then we provide a few examples to demonstrate the difference in rounding.
Cite
@article{arxiv.1806.05145,
title = {A Curious Case of Curbed Condition},
author = {Danny Hermes},
journal= {arXiv preprint arXiv:1806.05145},
year = {2018}
}