Dynamics of the evolving Bolthausen-Sznitman coalescent

Details Dynamics of the evolving Bolthausen-Sznitman coalescent Dynamics of the evolving Bolthausen-Sznitman coalescent

2011-12-12

arxiv.org/abs/1112.2742v1

Mathematics

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Scientific paper

Consider a population of fixed size that evolves over time. At each time, the genealogical structure of the population can be described by a coalescent tree whose branches are traced back to the most recent common ancestor of the population. As time goes forward, the genealogy of the population evolves, leading to what is known as an evolving coalescent. We will study the evolving coalescent for populations whose genealogy can be described by the Bolthausen-Sznitman coalescent. We obtain the limiting behavior of the evolution of the time back to the most recent common ancestor and the total length of the branches in the tree. By similar methods, we also obtain a new result concerning the number of blocks in the Bolthausen-Sznitman coalescent.

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