A Galton–Watson process with a threshold
Copyright policy )A Galton–Watson process with a threshold
Abstract In this paper we study a special class of size dependent branching processes. We assume that for some positive integer K as long as the population size does not exceed level K, the process evolves as a discrete-time supercritical branching process, and when the population size exceeds level K, it evolves as a subcritical or critical branching process. It is shown that this process does die out in finite time T. The question of when the mean value E(T) is finite or infinite is also addressed.
- Johannes Gutenberg University of Mainz Germany
- Iowa State University United States
60J80, Large deviations, Branching processes (Galton-Watson, birth-and-death, etc.), threshold, size dependence, Branching process, extinction time, 60F10, branching process
60J80, Large deviations, Branching processes (Galton-Watson, birth-and-death, etc.), threshold, size dependence, Branching process, extinction time, 60F10, branching process
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