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Article Contents

# Transitive sofic spacing shifts

• Spacing shifts were introduced by Lau and Zame in the 1970's to provide accessible examples of maps that are weakly mixing but not mixing. In previous papers by the authors and others, it has been observed that the problem of describing when spacing shifts are topologically transitive appears to be quite difficult in general. In the present paper, we give a characterization of sofic spacing shifts and begin to investigate which sofic spacing shifts are topologically transitive. We show that the canonical graph presentation of such a shift has a rather simple form, for which we introduce the terminology hereditary bunched cycle and discuss the apparently difficult problem of determining which hereditary bunched cycles actually present spacing shifts.
Mathematics Subject Classification: Primary: 37B10; Secondary: 37B20, 05C38, 68Q45.

 Citation:

•  [1] D. Ahmadi and M. Dabbaghian, Characterization of spacing shifts with positive topological entropy, Acta Math. Univ. Comenian. (N.S.), 81 (2012), 221-226. [2] N. Aoki and K. Hiraide, Topological Theory of Dynamical Systems. Recent Advances, North-Holland Mathematical Library, 52, North-Holland Publishing Co., Amsterdam, 1994. [3] J. Banks, Regular Periodic Decompositions for Topologically Transitive maps, Ergodic Theory Dynam. Systems 17 (1997), 505-529.doi: 10.1017/S0143385797069885. [4] J. Banks, T. T. D. Nguyen, P. Oprocha, B. Stanley and B. Trotta, Dynamics of spacing shifts, Discrete Contin. Dyn. Syst. 33 (2013), 4207-4232.doi: 10.3934/dcds.2013.33.4207. [5] D. S. Dummit and R. M. Foote, Abstract Algebra, Third edition, John Wiley & Sons, Inc., Hoboken, NJ, 2004. [6] H. Furstenberg, Recurrence in Ergodic Theory and Combinatorial Number Theory, Princeton University Press, Princeton, N.J., 1981. [7] S. Ginsburg, Algebraic and automata-theoretic properties of formal languages, North-Holland/American Elsevier, 1975. [8] M. Harrison, Introduction to Formal Language Theory, Addison-Wesley, 1978. [9] D. Kwietniak, Topological entropy and distributional chaos in hereditary shifts with applications to spacing shifts and beta shifts, Discrete Contin. Dyn. Syst, 33 (2013), 2451-2467.doi: 10.3934/dcds.2013.33.2451. [10] K. Lau and A. Zame, On weak mixing of cascades, Math. Systems Theory, 6 (1973), 307-311.doi: 10.1007/BF01740722. [11] D. Lind and B. Marcus, Introduction to Symbolic Dynamics and Coding, Cambridge University Press, 1995.doi: 10.1017/CBO9780511626302. [12] M. Lothaire, Algebraic Combinatorics on Words, Cambridge University Press, 1997.doi: 10.1017/CBO9780511566097.