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Markovianity of the invariant distribution of probabilistic cellular automata on the line. (English) Zbl 1371.37016
Summary: We revisit the problem of finding the conditions under which synchronous probabilistic cellular automata indexed by the line $$\mathbb{Z}$$, or the periodic line $$\mathbb{Z} / n \mathbb{Z}$$, depending on 2 neighbours, admit as invariant distribution the law of a space-indexed Markov chain. Our advances concern PCA defined on a finite alphabet, where most of existing results concern size 2 alphabet.
A part of the paper is also devoted to the comparison of different structures ($$\mathbb{Z}$$, $$\mathbb{Z} / n \mathbb{Z}$$, and also some structures constituted with two consecutive lines of the space-time diagram) with respect to the property to possess a Markovian invariant distribution.

##### MSC:
 37B15 Dynamical aspects of cellular automata 60K35 Interacting random processes; statistical mechanics type models; percolation theory 60J22 Computational methods in Markov chains 37A25 Ergodicity, mixing, rates of mixing
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