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arxiv: 0711.0649 · v1 · submitted 2007-11-05 · 🧮 math.PR

Survival and complete convergence for a spatial branching system with local regulation

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keywords systembranchingcompleteconvergencelocalmathbbregulationspatial
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We study a discrete time spatial branching system on $\mathbb{Z}^d$ with logistic-type local regulation at each deme depending on a weighted average of the population in neighboring demes. We show that the system survives for all time with positive probability if the competition term is small enough. For a restricted set of parameter values, we also obtain uniqueness of the nontrivial equilibrium and complete convergence, as well as long-term coexistence in a related two-type model. Along the way we classify the equilibria and their domain of attraction for the corresponding deterministic coupled map lattice on $\mathbb{Z}^d$.

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