函数的Tchebycheff-Fourier级数的(H,λ)平均逼近

On the Approximation by (H,λ)Means of Tchebycheff-Fourier Series

本文指出[1]中的主要定理是错的。给出了用T-F级数的（H，λ）平均逼近类H（ω）中的函数的一个新的估计，并且指出在一定意义下该估计的最优性。

In this paper,we point out that the main theorem in [1] is wrong, and give a new estimate about (H,λ)-mean of T.-F.series of functions in H(ω).In addition,we show that the new estimate is best in some sense