The shape theorem for the frog model

Details The shape theorem for the frog model The shape theorem for the frog model

2001-02-22

arxiv.org/abs/math/0102182v2

Mathematics

Probability

23 pages

Scientific paper

In this work we prove a shape theorem for a growing set of Simple Random Walks (SRWs), known as frog model. The dynamics of this process is described as follows: There are some active particles, which perform independent SRWs, and sleeping particles, which do not move. When a sleeping particle is hit by an active particle, it becomes active too. We prove that the set of the original positions of all the active particles, rescaled by the elapsed time, converges to some compact convex set. In some specific cases we are able to identify (at least partially) this set.

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