Changing the branching mechanism of a continuous state branching process using immigration

Details Changing the branching mechanism of a continuous state branching process using immigration Changing the branching mechanism of a continuous state branching process using immigration

2006-09-19

arxiv.org/abs/math/0609518v2

Annales de l'Institut Henri Poincare (B) Probability and Statistics 45, 1 (2009) 226-238

Mathematics

Probability

Scientific paper

10.1214/07-AIHP165

We construct a continuous state branching process with immigration (CBI) whose immigration depends on the CBI itself and we recover a continuous state branching process (CB). This provides a dual construction of the pruning at nodes of CB introduced by the authors in a previous paper. This construction is a natural way to model neutral mutation. Using exponential formula, we compute the probability of extinction of the original type population in a critical or sub-critical quadratic branching, conditionally on the non extinction of the total population.

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