摘要
本文构造了Stancu—Sikkema算子,并利用点态光滑模研究了此算子的点态逼近正逆定理.
In this paper, we construct Stancu-Sikkema operators and obtain the point-wise direct and converse theorems in terms of pointwise modulus of smoothness. Some results about Bernstein-Sikkema operators and Stancu operators are extended.
基金
Supported by NSF of Hebei Province(101090)
