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arXiv 0802.1389cs.DCmath.PR
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几种首领选举算法的收敛性

Convergence of some leader election algorithms

Svante Janson, Christian Lavault, Guy Louchard

摘要:

我们从一组n个参与人开始。以某种概率P(n,k),我们杀死n-k个参与者;其他人活着,我们重复他们。在只有一个参与者之前,阶段(或回合)的数量X_n的分布是什么?我们提出了一个概率分析,该算法在一定条件下的概率分布P(n,k),包括随机单调性和假设,大约一个固定比例的α的球员生存在每一轮。本文证明了X_n-log_an n的一种分布收敛性,其中基a=1/alpha,与许多其它类似问题一样,存在振荡,没有真正的极限分布,但适当的连续性是收敛的,并且存在一个绝对连续的随机变量Z,使得X_n的分布可以近似为Z+log_an n四舍五入到最近的大整数.一般结果的应用包括领袖选举算法,其中玩家被淘汰的独立硬币投掷和领导者选举算法的变化提出的W.R.富兰克林我们进一步研究后者的算法,包括数值结果。

英文摘要:

We start with a set of n players. With some probability P(n,k), we kill n-k players; the other ones stay alive, and we repeat with them. What is the distribution of the number X_n of phases (or rounds) before getting only one player? We present a probabilistic analysis of this algorithm under some conditions on the probability distributions P(n,k), including stochastic monotonicity and the assumption that roughly a fixed proportion alpha of the players survive in each round. We prove a kind of convergence in distribution for X_n-log_a n, where the basis a=1/alpha; as in many other similar problems there are oscillations and no true limit distribution, but suitable subsequences converge, and there is an absolutely continuous random variable Z such that the distribution of X_n can be approximated by Z+log_a n rounded to the nearest larger integer. Applications of the general result include the leader election algorithm where players are eliminated by independent coin tosses and a variation of the leader election algorithm proposed by W.R. Franklin. We study the latter algorithm further, including numerical results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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