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arxiv: math/0610179 · v1 · submitted 2006-10-05 · 🧮 math.PR

A new coexistence result for competing contact processes

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keywords dispersalcoexistencecontactpossibleblockscoexistcompetingcompetitor
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Neuhauser [Probab. Theory Related Fields 91 (1992) 467--506] considered the two-type contact process and showed that on $\mathbb{Z}^2$ coexistence is not possible if the death rates are equal and the particles use the same dispersal neighborhood. Here, we show that it is possible for a species with a long-, but finite, range dispersal kernel to coexist with a superior competitor with nearest-neighbor dispersal in a model that includes deaths of blocks due to ``forest fires.''

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