摘要
本文给出了与随机选取置换有关的一类随机变量的方差和r阶矩,求得了这类随机变量的分布律,并证明了关于全向置换计数的猜想的一部分,对吕述望教授等的步的补充和完善.
This paper,firstly,gives the variance and the rth moment of a class of random variable related to random selected permutation.Then it presents the distribution of the class of random variable above,and proves part of a guess about omni direction enumeration.Furthermore,it completes and perfects the correlative researches of professor LU Shu wang and others.
出处
《应用数学》
CSCD
北大核心
2004年第S2期40-45,共6页
Mathematica Applicata
关键词
全向置换
概率模型
公钥密码体制RSA
不动点
随机置换
Omni-direction pernutation
Probability model
RSA public key cryptographic system
Invariable point
Random pernutation
