منابع مشابه
Sofic-Dyck Shifts
We define the class of sofic-Dyck shifts which extends the class of Markov-Dyck shifts introduced by Inoue, Krieger and Mat-sumoto. Sofic-Dyck shifts are shifts of sequences whose finite factors form unambiguous context-free languages. We show that they correspond exactly to the class of shifts of sequences whose sets of factors are visibly pushdown languages. We give an expression of the zeta ...
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Finite automata (with outputs but no initial states) have been extensively used as models of computational complementarity, a property which mimics the physical complementarity. All this work was focussed on \frames", i.e., on xed, static, local descriptions of the system behaviour. In this paper we are mainly interested in the asymptotical description of complementarity. To this aim we will st...
متن کاملCombinatorial Independence and Sofic Entropy
We undertake a local analysis of combinatorial independence as it connects to topological entropy within the framework of actions of sofic groups.
متن کاملQuantifier Extensions of Multidimensional Sofic Shifts
We define a pair of simple combinatorial operations on subshifts, called existential and universal extensions, and study their basic properties. We prove that the existential extension of a sofic shift by another sofic shift is always sofic, and the same holds for the universal extension in one dimension. However, we also show by a construction that universal extensions of twodimensional sofic ...
متن کاملA Hierarchy of Irreducible Sofic Shifts
We define new subclasses of the class of irreducible sofic shifts. These classes form an infinite hierarchy where the lowest class is the class of almost finite type shifts introduced by B. Marcus. We give effective characterizations of these classes with the syntactic semigroups of the shifts.
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ژورنال
عنوان ژورنال: Indagationes Mathematicae
سال: 2006
ISSN: 0019-3577
DOI: 10.1016/s0019-3577(06)80037-6