4 research outputs found

    Inverse semigroups and varieties of finite semigroups

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    A hierarchy of irreducible sofic shifts

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    International audienceWe 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

    Subject Index Volumes 1–200

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    Acta Cybernetica : Volume 19. Number 2.

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