Chebyshev-Fourier级数部分和逼近单调型连续函数的误差估计

An Error Estimate of Approximation for Monotonic Type Continuous Functions by the Partial Sums of C-F Series

研究了用Ｃｈｅｂｙｓｈｅｖ级数部分和逼近单调型连续函数，得到了逼近的误差估计，并提 出了 ３个问题．这 ３个问题的核心就是估计式中的因子“ｌｏｇ ｎ”能否去掉．

The appoximation for continuous functions of monotonic type by the partial sums of Chebyshev-Fourier series has been investigated. An eromr estimate of the approximation is obtained. At the end three questions are raised, and it is the core of three quetihons that whether logn could be removed from some estimate expressions.