Mathematics – Probability
Scientific paper
2001-10-25
Mathematics
Probability
Scientific paper
We prove a shape theorem for a growing set of simple random walks on Z^d, known as frog model. The dynamics of this process is described as follows: There are active particles, which perform independent discrete time SRWs, and sleeping particles, which do not move. When a sleeping particle is hit by an active particle, the former becomes active as well. Initially, a random number of particles is placed into each site. At time 0 all particles are sleeping, except for those placed at the origin. We prove that the set of all sites visited by active particles, rescaled by the elapsed time, converges to a compact convex set.
Alves O. S. M.
Machado Fábio P.
Popov Serguei Yu.
Ravishankar Krishnamurthi
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