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Part of the book series: Lecture Notes in Computer Science ((LNAI,volume 2850))

Abstract.

The first-order theory of an automatic structure is known to be decidable but there are examples of automatic structures with nonelementary first-order theories. We prove that the first-order theory of an automatic structure of bounded degree (meaning that the corresponding Gaifman-graph has bounded degree) is elementary decidable. More precisely, we prove an upper bound of triply exponential alternating time with a linear number of alternations. We also present an automatic structure of bounded degree such that the corresponding first-order theory has a lower bound of doubly exponential time with a linear number of alternations. We prove similar results also for tree automatic structures.

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Lohrey, M. (2003). Automatic Structures of Bounded Degree. In: Vardi, M.Y., Voronkov, A. (eds) Logic for Programming, Artificial Intelligence, and Reasoning. LPAR 2003. Lecture Notes in Computer Science(), vol 2850. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-39813-4_25

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  • DOI: https://doi.org/10.1007/978-3-540-39813-4_25

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-540-20101-4

  • Online ISBN: 978-3-540-39813-4

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