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arXiv 2005.09924math.PR
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平稳连续状态分支过程的一些性质

Some properties of stationary continuous state branching processes

Romain Abraham, Jean-François Delmas, Hui He

摘要:

本文研究了具有移民的平稳连续态分支过程的谱系树。对于亚临界稳定分支机制,我们考虑了在某个固定时刻现存种群的谱系树,并证明了在确定性的时间变化下,它是作为一个带移民的连续时间Galton-Watson过程分布的.我们得到了类似的结果,一个临界稳定的分支机制时,只看移民到达一些固定的时间间隔。对于一般的亚临界分支机制,我们考虑在现存种群中产生后代的个体的数量。相关的过程(向前或向后的时间)是纯死亡或纯出生马尔可夫过程,我们计算的转移率。

英文摘要:

We consider the genealogical tree of a stationary continuous state branching process with immigration. For a sub-critical stable branching mechanism, we consider the genealogical tree of the extant population at some fixed time and prove that, up to a deterministic time-change, it is distributed as a continuous-time Galton-Watson process with immigration. We obtain similar results for a critical stable branching mechanism when only looking at immigrants arriving in some fixed time-interval. For a general sub-critical branching mechanism, we consider the number of individuals that give descendants in the extant population. The associated processes (forward or backward in time) are pure-death or pure-birth Markov processes, for which we compute the transition rates.

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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