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On the Accepting Power of 2-Tape Büchi Automata

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Abstract

We show that, from a topological point of view, 2-tape Büchi automata have the same accepting power than Turing machines equipped with a Büchi acceptance condition. In particular, for every non null recursive ordinal α, there exist some Σ\(^{\rm 0}_{\alpha}\)-complete and some Π\(^{\rm 0}_{\alpha}\)-complete infinitary rational relations accepted by 2-tape Büchi automata. This surprising result gives answers to questions of Simonnet [Sim92] and of Lescow and Thomas [Tho90, LT94].

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Finkel, O. (2006). On the Accepting Power of 2-Tape Büchi Automata. In: Durand, B., Thomas, W. (eds) STACS 2006. STACS 2006. Lecture Notes in Computer Science, vol 3884. Springer, Berlin, Heidelberg. https://doi.org/10.1007/11672142_24

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  • DOI: https://doi.org/10.1007/11672142_24

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-32301-3

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