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Rank-dependent Galton‒Watson processes and their pathwise duals
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Rank-dependent Galton‒Watson processes and their pathwise duals
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Journal Article
Rank-dependent Galton‒Watson processes and their pathwise duals
2018
Overview
We introduce a modified Galton‒Watson process using the framework of an infinite system of particles labelled by (x,t), where x is the rank of the particle born at time t. The key assumption concerning the offspring numbers of different particles is that they are independent, but their distributions may depend on the particle label (x,t). For the associated system of coupled monotone Markov chains, we address the issue of pathwise duality elucidated by a remarkable graphical representation in which the trajectories of the primary Markov chains and their duals coalesce to form forest graphs on a two-dimensional grid.
Publisher
Cambridge University Press
Subject
