arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1603.09142math.PR
收藏

次临界接触过程指数衰减的一个简单证明

A simple proof of exponential decay of subcritical contact processes

Jan M. Swart

摘要:

本文给出了一个新的,简单的证明已知的事实,接触过程一般格,在亚临界制度的预期数量的感染网站的指数衰减快的时间趋于无穷大。证明还产生了一个明确的边界上的生存概率低于临界恢复率,这表明,与此功能相关的临界指数是有界的,从下面的平均场值。证明的主要思想是,如果感染站点的预期数量比指数衰减得慢,那么这意味着存在一个调和函数,可以用来表明该过程在任何较低的恢复率值下都能存活。

英文摘要:

This paper gives a new, simple proof of the known fact that for contact processes on general lattices, in the subcritical regime the expected number of infected sites decays exponentially fast as time tends to infinity. The proof also yields an explicit bound on the survival probability below the critical recovery rate, which shows that the critical exponent associated with this function is bounded from below by its mean-field value. The main idea of the proof is that if the expected number of infected sites decays slower than exponentially, then this implies the existence of a harmonic function that can be used to show that the process survives for any lower value of the recovery rate.

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。

↑