关于积分∫_a^bf(x)g(x)dx的一个不等式的注记

A Note on an Inequality of Integral ∫ b af(x)g(x)dx

本文推广了有关积分∫ｂａｆ（ｘ）ｇ（ｘ）ｄｓ的一个不等式并将其应用于∧－有界变分函数ｆ（ｘ）的Ｆｏｕｒｉｅｒ系数的估计．

We generalize an inequality of integral ∫ b af(x)g(x)dx and apply it to estimate Fourier coefficient of f(x) of ∧ bounded variation a n(f) and obtain the best estimation.