Math @ Duke

Publications [#243461] of Richard T. Durrett
Papers Published
 Durrett, R; Steif, JE, Some rigorous results for the GreenbergHastings Model,
Journal of Theoretical Probability, vol. 4 no. 4
(1991),
pp. 669690, ISSN 08949840 [doi]
(last updated on 2018/03/20)
Abstract: In this paper, we obtain some rigorous results for a cellular automaton known as the GreenbergHastings Model. The state space is {0, 1, 2}Zd. The dynamics are deterministic and discrete time. A site which is 1 changes to 2, a site which is 2 changes to 0, and a site which is 0 changes to a 1 if one of its 2 d neighbors is a 1. In one dimension, we compute the exact asymptotic rate at which the system dies out when started at random and compute the topological entropy. In two or more dimensions we show that starting from a nontrivial product measure, the limit exists as 3 m→∞ and is Bernoulli shift. Finally, we investigate the behavior of the system on a large finite box. © 1991 Plenum Publishing Corporation.


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