期刊
NUMERICAL ALGORITHMS
卷 77, 期 2, 页码 433-450出版社
SPRINGER
DOI: 10.1007/s11075-017-0322-0
关键词
Circle arc; Parametric polynomial curve; Uniform approximation
In the paper, the uniform approximation of a circle arc (or a whole circle) by a parametric polynomial curve is considered. The approximant is obtained in a closed form. It depends on a parameter that should satisfy a particular equation, and it takes only a couple of tangent method steps to compute it. For low degree curves, the parameter is provided exactly. The distance between a circle arc and its approximant asymptotically decreases faster than exponentially as a function of polynomial degree. Additionally, it is shown that the approximant could be applied for a fast evaluation of trigonometric functions too.
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