|x|在加密的Chebyshev结点的有理插值
Rational Interpolation to|x|at the Dense Chebyshev Nodes
张慧明 1李建俊2
作者信息
- 1. 河北地质大学 数理学院,河北 石家庄 050031
- 2. 河北师范大学附属民族学院,河北 石家庄 050091
- 折叠
摘要
本文在Chebyshev结点基础上构造一类新的结点,研究|x|在这类新结点的有理插值,利用放缩法得到确切逼近阶为O(1/n2logn).通过对|x|在几种结点组的误差进行数值计算、分析,揭示|x|的有理插值本质.
Abstract
This article constructs a new nodes based on the Chebyshev nodes,studies the rational interpolation of|x|at the new nodes,and uses the scaling method to obtain an exact approximation order that is O(1/n2logn).By numerically calculating and analyzing the errors of|x|in several node groups,the essence of rational interpolation of|x|is revealed.
关键词
加密的Chebyshev结点/调整的Chebyshev结点/有理插值/Newman型有理算子/逼近阶Key words
dense Chebyshev nodes/adjusted Chebyshev nodes/rational interpolation/Newman-type rational operators/order of ap-proximation引用本文复制引用
基金项目
河北省自然科学基金(A2020403024)
出版年
2024