摘要
对Wallis不等式做出了新的改进.与目前掌握的文献相比,所得结果精度更高,且容易估计误差.同时还导出了(2n(2-n)1!)!!!的一个渐近展开式.
New improvement for Wallis＇ inequality is given. To contrast with related literature now, the accuracy of the result is sharper, and the error estimate is easily obtained. At the same time, an asymptotic expansion for （2n-1）!!/（2n）!! is deduced.
出处
《数学的实践与认识》
CSCD
北大核心
2009年第8期224-227,共4页
Mathematics in Practice and Theory
关键词
Wallis不等式
单调数列
精度
Wallis＇ inequality
monotone sequence of numbers
accuracy
