Orbit equivalent substitution dynamical systems and complexity

Details Orbit equivalent substitution dynamical systems and complexity Orbit equivalent substitution dynamical systems and complexity

2012-01-08

arxiv.org/abs/1201.1622v1

Mathematics

Dynamical Systems

19 pages

Scientific paper

For any primitive proper substitution \sigma, we give explicit constructions of countably many pairwise non-isomorphic substitution dynamical systems {(X_{\zeta_n}, T_{\zeta_n})}_{n=1}^{\infty} such that they all are (strong) orbit equivalent to (X_{\sigma}, T_{\sigma}). We show that the complexity of the substitution dynamical systems {(X_{\zeta_n}, T_{\zeta_n})} is essentially different that prevents them from being isomorphic. Given a primitive (not necessarily proper) substitution \tau, we find a stationary simple properly ordered Bratteli diagram with the least possible number of vertices such that the corresponding Bratteli-Vershik system is orbit equivalent to (X_{\tau}, T_{\tau}).

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