二元Jackson型算子的最佳逼近常数  

The Best Approximation Constant for the Bivariate Jackson Operators

作　　者：胡晓英[1] 盛宝怀[1] Hu XiaoYing;Cheng BaoHuai

机构地区：[1]绍兴文理学院数学系,浙江绍兴312000

出　　处：《绍兴文理学院学报（自然科学版）》2005年第9期6-14,共9页Journal of Shaoxing College of Arts and Sciences

摘　　要：研究了二元Jack80n多项式对周期函数的逼近阶估计．分别给出了以一阶和二阶光滑模刻画的Jack80n型估计式，并分别给出了逼近的最佳常数．The estimate of approximation by bivariate Jackson polynomials is investigated. The Jackson estimate is established respectively by the modulus of smoothness of first and second order. Finally, the best approximation constant is given respectively.

关 键 词：Jackson型算子 连续模 逼近常数 

分 类 号：O174.41[理学—数学;理学—基础数学]