摘要
主要研究了由三角插值算子出发构造的二元离散形式Marcinkiewicz型和的强性逼近的估计式,即二元三角插值算子的(p,p)阶r次强性逼近问题,得到了强性逼近的估计式,推广了一些文献中的结论.
The Marcinkiewicz and the approximation estimate of the bivariate trigonometric interpolation sequences are researched in the paper, that's to say, it's the (p, p)-th strongly approximation for every positive real number. Therefore, the estimate of approximation is obtained. Some conclusions of the literature are popularized.
出处
《宁夏师范学院学报》
2009年第3期10-12,15,共4页
Journal of Ningxia Normal University
基金
北方民族大学科学研究资助项目(2006Y048)
关键词
二元
最佳逼近
强性逼近
Bivariate
Best approximation
Strong approximation