Tchebycheff-Fourier级数的Vallce Poussin平均逼近函数类Lip α

On the Approximation of Class Lipα by V P Means of T F Series

本文考虑用ＴｃｈｅｂｙｃｈｅｆＦｏｕｒｉｅｒ级数的ＶａｌéｅＰｏｕｓｉｎ平均逼近函数类Ｌｉｐα，在ｆ（ｘ）∈Ｃ［－１，１］时获得了逼近阶及逼近误差的表达式，推广并较大地改进了文献［１，２］中的有关结果．

The Approximation of f∈C is discussed by V P means of T F series. The order of approximation and the expression of the error of approximation are obtained. The results of and have been improved.