全文下载:2013020207
李建俊1,张慧明2
(1.河北师范大学 附属民族学院,河北 石家庄 050091;2.石家庄经济学院 数理学院,河北 石家庄 050031)
摘要: 利用C#语言程序,通过对几个结点组的研究,进一步说明Newman型有理算子在整个实轴点态收敛于|x|。在整个实轴,当结点个数n是偶数时,rn(X;x)<S1;当结点个数n是奇数时,rn(X;x)>x2S1。在\[-1,1\]逼近效果好,反而在整个实轴逼近效果差。
关键词: C#;有理逼近;Newman型有理算子;点态收敛;逼近误差
中图分类号: TP 311.11;O 174.41文献标志码:A
Using C# Language Programs to Solve Rational Approximation Problem of |x| in (-∞,+∞)
LI Jian-jun 1,ZHANG Hui-ming 2
(1.Affiliated College of Minority Education, Hebei Teachers’ University, Shijiazhuang 050091,China;
2.School of Mathematics and Physics, Shijiazhuang University of Economics, Shijiazhuang 050031,China)
Abstract: We explained further Newman-type rational operators pointwise convergence to |x| in the whole real axis through the study of several nodes by C# language program.When the number of nodes is even,rn(X;x)<S1; When the number of nodes is odd, rn(X;x)>x2S1. Approximation effect is good in \[-1,1\], but approximation effect is poor in the whole real axis.
Key words: C#; rational approximation; Newman-type rational operators; pointwise convergence;error of appoximation
收稿日期:2012-05-04
基金项目: 国家自然科学基金项目(10972011);河北省教育厅自然科学研究项目(Z2011155)
作者简介: 李建俊(1979-),女,讲师。