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Density Classification on Infinite Lattices and Trees

Identifieur interne : 001B52 ( Hal/Corpus ); précédent : 001B51; suivant : 001B53

Density Classification on Infinite Lattices and Trees

Auteurs : Ana Busic ; Nazim Fatès ; Irène Marcovici ; Jean Mairesse

Source :

RBID : Hal:hal-00918583

Abstract

Consider an infinite graph with nodes initially labeled by independent Bernoulli random variables of parameter p. We address the density classification problem, that is, we want to design a (probabilistic or deterministic)cellular automaton or a finite-range interacting particle system that evolves on this graph and decides whether p is smaller or larger than 1/2. Precisely, the trajectories should converge to the uniform configuration with only 0's if p<1/2, and only 1's if p>1/2. We present solutions to the problem on the regular grids of dimension d, for any d>1, and on the regular infinite trees. For the bi-infinite line, we propose some candidates that we back up with numerical simulations.

Url:
DOI: 10.1214/EJP.v18-2325

Links to Exploration step

Hal:hal-00918583

Le document en format XML

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