摘要
设ζ(r)表示RiemannZeta函数,最近Bracken和Klamkin证明了:若整数r≥2,(r-1)ζ(r)是对数凹函数。如果对任何正实数r,本文则证明了(1-21-r)δ(r)的对数凹性。显然,我们的结果推广了Bracken和Klamkin的结论。
Letζ(r) is the Riemann Zeta- function. Recetly, if integers r≥2, the logarithmic concavity of (r-1)ζ(r) is proved by Bracken and Klamkin. In this paper, if real numbers r > 0, the logarithmic concavity of (1- 2~1-r )ζ(r) is proved. It is evident that our results expand the conclusions of Bracken and Klamkin.
出处
《长沙交通学院学报》
1998年第2期1-5,共5页
Journal of Changsha Communications University
关键词
黎曼Zeta函数
对数凹性
不等式
Riemann's Zeta - function
logarithmic concavity
inequality