若函數f 在實數區間 I 上是凸函數,其中a ,b∈I,則 f((a+b)/2)≤1/(b-a) integral_a^b f(x) dx≤1/2[f(a)+f(b)]是文獻中著名的Hermite-Hadamard不等式。 A.EL FARISSI提出了這樣的問題:若函數f 在實數區間 I 上是凸 函數,a ,b∈I,則是否存在兩個實數l和L使得下列不等式成立: f((a+b)/2)≤l≤1/(b-a) integral_a^b f(x) dx≤L≤1/2[f(a)+f(b)] 本文主要研究目的是提供上述問題的一些答案,且導出一些更細化的Hermite-Hadamard不等式。
If f is convex function on [a,b], then f((a+b)/2)≤1/(b-a) integral_a^b f(x) dx≤1/2[f(a)+f(b)] is known in the literature called Hermite-Hadamard inequality. There is the question that if f is convex function on [a,b], does it exist real l and L such that f((a+b)/2)≤l≤1/(b-a) integral_a^b f(x) dx≤L≤1/2[f(a)+f(b)] The major goal of this study is to give some answers to the question,and refinements of Hermite-Hadamard inequality.