摘要
利用Ditizan Totik光滑模讨论了K阶Sikkema Kantorovitch算子的逼近问题,给出了它的强型正定理和弱型逆定理 在逆定理中取消了对αn的限制,从而很容易得到其逼近的特征刻化.
The approximation of the sikkemaKantorovitch operators of order K are discussed by using of the DitizanTotik modulus of smoothness,and the strongtype direct theorem and the weaktype inverse theorem of the appoximation are given.The inverse theorem has not limit for αn,thus its approximation characterization is easily obtained.
出处
《烟台大学学报(自然科学与工程版)》
CAS
2002年第4期235-240,共6页
Journal of Yantai University(Natural Science and Engineering Edition)