摘要
本文研究二维Rogosinski算子在x_(2π)~p;(Q)空间中的逼近,给出了逼近阶的上方与下方估计。
In this paper, the degree of approximation for two-dimensional Rog- osinski operators in X_(2π)~p(Q) spaccsis studied, the upper estimate and lower esti-mate of the degree of approximation are given.
出处
《宁夏大学学报（自然科学版）》
CAS
1993年第4期30-33,共4页
Journal of Ningxia University(Natural Science Edition)
关键词
R算子
逼近
傅里叶级数
two-dimensional Rogosinski operators, X_(2π)^(p) (Q) spaces, approximation.
