Measure rigidity for algebraic bipermutative cellular automata

Details Measure rigidity for algebraic bipermutative cellular automata Measure rigidity for algebraic bipermutative cellular automata

2005-10-26

arxiv.org/abs/math/0510564v2

Mathematics

Dynamical Systems

Scientific paper

Let $(\az,F)$ be a bipermutative algebraic cellular automaton. We present conditions which force a probability measure which is invariant for the $\N\times\Z$-action of $F$ and the shift map $\s$ to be the Haar measure on $\gs$, a closed shift-invariant subgroup of the Abelian compact group $\az$. This generalizes simultaneously results of B. Host, A. Maass and S. Mart\'{\i}nez \cite{Host-Maass-Martinez-2003} and M. Pivato \cite{Pivato-2003}. This result is applied to give conditions which also force a $(F,\s)$-invariant probability measure to be the uniform Bernoulli measure when $F$ is a particular invertible expansive cellular automaton on $\an$.

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