论文标题

马尔可夫分支过程的合并树,具有广义逻辑生长

The coalescent tree of a Markov branching process with generalised logistic growth

论文作者

Cheek, David

论文摘要

我们考虑一类密度依赖的分支过程,该过程概括了指数,逻辑和gompertz的增长。人口始于一个人,最初成倍增长,然后随着人口规模朝着承载能力发展而变慢。在人口仍在高等的时期,对固定数量的个体进行了采样,并绘制了固定的个人。我们将抽样时间和同时承载到无穷大,我们证明了融合树与有限的树的融合,这在我们类模型中是普遍的。

We consider a class of density-dependent branching processes which generalises exponential, logistic and Gompertz growth. A population begins with a single individual, grows exponentially initially, and then growth may slow down as the population size moves towards a carrying capacity. At a time while the population is still growing superlinearly, a fixed number of individuals are sampled and their coalescent tree is drawn. Taking the sampling time and carrying capacity simultaneously to infinity, we prove convergence of the coalescent tree to a limiting tree which is in a sense universal over our class of models.

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