Reaching a Consensus on Random Networks: The Power of Few
Reaching a Consensus on Random Networks: The Power of Few
复制标题
在随机网络上达成共识:少数人的力量
DOI:
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复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
V. Vu
中科院分区:
文献类型:
--
作者:
L. Tran;V. Vu
A community of $n$ individuals splits into two camps, Red and Blue. The individuals are connected by a social network, which influences their colors. Everyday, each person changes his/her color according to the majority among his/her neighbors. Red (Blue) wins if everyone in the community becomes Red (Blue) at some point.
We study this process when the underlying network is the random Erdos-Renyi graph $G(n, p)$. With a balanced initial state ($n/2$ person in each camp), it is clear that each color wins with the same probability.
Our study reveals that for any constants $p$ and $\varepsilon$, there is a constant $C$ such that if one camp has $n/2 +C$ individuals, then it wins with probability at least $1 - \varepsilon$. The surprising key fact here is that $C$ does not depend on $n$, the population of the community. When $p=1/2$ and $\varepsilon =.1$, one can set $C$ as small as 6. If the aim of the process is to choose a candidate, then this means it takes only $6$ "defectors" to win an election unanimously with overwhelming odd.
影响因子:
1
作者:
Fountoulakis N
通讯作者:
Fountoulakis N
DOI:
10.1137/1.9781611974782.169
发表时间:
2016-02
期刊:
ArXiv
影响因子:
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作者:
Dan Alistarh;J. Aspnes;David Eisenstat;Rati Gelashvili;R. Rivest
通讯作者:
Dan Alistarh;J. Aspnes;David Eisenstat;Rati Gelashvili;R. Rivest