Lambda-coalescents with dust component

Details Lambda-coalescents with dust component Lambda-coalescents with dust component

2011-02-06

arxiv.org/abs/1102.1146v1

Mathematics

Probability

21 pages

Scientific paper

We consider the lambda-coalescent processes with positive frequency of singleton clusters. The class in focus covers, for instance, the beta$(a,b)$-coalescents with $a>1$. We show that some large-sample properties of these processes can be derived by coupling the coalescent with an increasing L{\'e}vy process (subordinator), and by exploiting parallels with the theory of regenerative composition structures. In particular, we discuss the limit distributions of the absorption time and the number of collisions.

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