摘要
主要讨论了一类多元post-widder算子的线性逼近性质,建立了一致逼近下的正、逆定理,并给出了逼近阶的特征刻画.
In this paper, we discuss the approximation properties of linear combinations of multidimensional post - widder operators, and establish the theory and its reverse under the uniform approximation. At last, the characterization of approximation degree is given.
出处
《绍兴文理学院学报》
2008年第7期5-9,共5页
Journal of Shaoxing University
关键词
多元post-widder算子
多元线性组合
一致逼近
特征刻划
multidimensional post- widder operators
multidimensional linear combination
uniform approximation
characterization
