A method to construct a kind of combinatorial linear approximation operators is given and some linear operators which have special approximation properties are obtained.
给出一种构造组合线性逼近算子的方法。由此可得到具有特殊逼近性质的线性算子。
Weighted approximation by a class of linear combinations of Bernstein type operators;
给出了一类多元线性正算子线性组合在一致逼近意义下的特征刻划。
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