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arXiv 1402.4534math.PR
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进化中的β聚结剂

The evolving beta coalescent

Götz Kersting, Jason Schweinsberg, Anton Wakolbinger

摘要:

在数学群体遗传学中,众所周知,人们可以用一棵树来表示一个群体的系谱,这表明了群体中个体的祖先系在时间上是如何结合的。随着种群随时间演化,代表种群谱系的树也发生变化,导致称为演化聚结的树值随机过程。在这里,我们将考虑不断发展的聚结人口的家谱可以描述的β聚结,这是已知的家谱人口非常大的家庭规模。我们发现,作为人口的大小趋于无穷大,某些功能的β聚结,如合并的总数,总分支长度,和外部分支的总长度的演变,收敛到一个固定的稳定过程。我们的方法也导致新的证明已知的渐近结果的某些泛函的非发展β聚结。

英文摘要:

In mathematical population genetics, it is well known that one can represent the genealogy of a population by a tree, which indicates how the ancestral lines of individuals in the population coalesce as they are traced back in time. As the population evolves over time, the tree that represents the genealogy of the population also changes, leading to a tree-valued stochastic process known as the evolving coalescent. Here we will consider the evolving coalescent for populations whose genealogy can be described by a beta coalescent, which is known to give the genealogy of populations with very large family sizes. We show that as the size of the population tends to infinity, the evolution of certain functionals of the beta coalescent, such as the total number of mergers, the total branch length, and the total length of external branches, converges to a stationary stable process. Our methods also lead to new proofs of known asymptotic results for certain functionals of the non-evolving beta coalescent.

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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