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Complexity of EOL structural equivalence

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Mathematical Foundations of Computer Science 1994 (MFCS 1994)

Part of the book series: Lecture Notes in Computer Science ((LNCS,volume 841))

Abstract

We show that the EOL structural equivalence problem is logspace hard for deterministic exponential time. Also, we show that this question can be solved in linear space by a synchronized alternating Turing machine, and thus establish an exponential space upper bound for its complexity. The equivalence of finite tree automata is shown to be logspace reducible to context-free structural equivalence. The converse reduction is well known and thus context-free structural equivalence is complete for deterministic exponential time.

Research supported by the Natural Sciences and Engineering Research Council of Canada grants.

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Author information

Authors and Affiliations

  1. Department of Mathematics, University of Turku, 20500, Turku, Finland

    Kai Salomaa

  2. Department of Computer Science, University of Western Ontario, N6A 5B7, London, Ontario, Canada

    Derick Wood & Sheng Yu

Authors
  1. Kai Salomaa
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  2. Derick Wood
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  3. Sheng Yu
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Igor Prívara Branislav Rovan Peter Ruzička

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© 1994 Springer-Verlag Berlin Heidelberg

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Salomaa, K., Wood, D., Yu, S. (1994). Complexity of EOL structural equivalence. In: Prívara, I., Rovan, B., Ruzička, P. (eds) Mathematical Foundations of Computer Science 1994. MFCS 1994. Lecture Notes in Computer Science, vol 841. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-58338-6_105

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  • DOI: https://doi.org/10.1007/3-540-58338-6_105

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  • Print ISBN: 978-3-540-58338-7

  • Online ISBN: 978-3-540-48663-3

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