摘要
该文研究M.Heilmann引入的一个算子M_n(f,x),给出逼近的正逆定理和导数的特征刻划定理。
This paper studies a operator M (f,x) introduced byM. Heilmann[1J, gives the direct and converse theorems of approxi-mation and the character theorem of derivative.
出处
《南京理工大学学报》
EI
CAS
CSCD
1993年第6期92-96,共5页
Journal of Nanjing University of Science and Technology
关键词
算子逼近
连续模
正逆定理
approximation by operators
continuous modulus (mathematics)
direct and converse theorem
character theorem
