Skip to main content

Which Finitely Ambiguous Automata Recognize Finitely Sequential Functions?

(Extended Abstract)

  • Conference paper
Mathematical Foundations of Computer Science 2013 (MFCS 2013)

Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 8087))

Abstract

Weighted automata, especially min-plus automata that operate over the tropical semiring, have both a beautiful theory and important practical applications. In particular, if one could find a sequential or finitely sequential equivalent to a given (or learned) min-plus automaton, one could increase performance in several applications. But this question has long remained open even as a decision problem. We show that existence of a finitely sequential equivalent for a given finitely ambiguous min-plus automaton is decidable.

Supported by NCN grant DEC-2011/01/D/ST6/07164, 2011-2015. The work was done in main part during the author visit at LIAFA laboratory Univeristy Paris Diderot, and in cooperation with the European Union’s Seventh Framework Programme (FP7/2007-2013) grant agreement 259454. The visit at LIAFA was sponsored by European Science Foundation, within the project GAMES.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Chapter
USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
eBook
USD 39.99
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 54.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Kirsten, D., Lombardy, S.: Deciding unambiguity and sequentiality of polynomially ambiguous min-plus automata. In: Albers, S., Marion, J.Y. (eds.) STACS. LIPIcs, vol. 3, pp. 589–600. Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany (2009)

    Google Scholar 

  2. Mohri, M.: Finite-state transducers in language and speech processing. Computational Linguistics 23(2), 269–311 (1997)

    MathSciNet  Google Scholar 

  3. Klimann, I., Lombardy, S., Mairesse, J., Prieur, C.: Deciding unambiguity and sequentiality from a finitely ambiguous max-plus automaton. Theor. Comput. Sci. 327(3), 349–373 (2004)

    Article  MathSciNet  MATH  Google Scholar 

  4. Kirsten, D.: A burnside approach to the termination of mohri’s algorithm for polynomially ambiguous min-plus-automata. ITA 42(3), 553–581 (2008)

    MathSciNet  MATH  Google Scholar 

  5. Lombardy, S., Sakarovitch, J.: Sequential? Theor. Comput. Sci. 356(1-2), 224–244 (2006)

    Article  MathSciNet  MATH  Google Scholar 

  6. Choffrut, C.: Une caracterisation des fonctions sequentielles et des fonctions sous-sequentielles en tant que relations rationnelles. Theor. Comput. Sci. 5(3), 325–337 (1977)

    Article  MathSciNet  Google Scholar 

  7. Allauzen, C., Mohri, M.: Efficient algorithms for testing the twins property. Journal of Automata, Languages and Combinatorics 8(2), 117–144 (2003)

    MathSciNet  MATH  Google Scholar 

  8. Kirsten, D.: Decidability, undecidability, and pspace-completeness of the twins property in the tropical semiring. Theor. Comput. Sci. 420, 56–63 (2012)

    Article  MathSciNet  MATH  Google Scholar 

  9. Sakarovitch, J., de Souza, R.: On the decomposition of k-valued rational relations. In: Albers, S., Weil, P. (eds.) STACS. LIPIcs, vol. 1, pp. 621–632. Schloss Dagstuhl - Leibniz-Zentrum fuer Informatik, Germany (2008)

    Google Scholar 

  10. Hashiguchi, K., Ishiguro, K., Jimbo, S.: Decidability of the equivalence problem for finitely ambiguous finance automata. IJAC 12(3), 445 (2002)

    MathSciNet  MATH  Google Scholar 

  11. Haumbold, N.: The similarity and equivalence problem for finitely ambiguous automata over tropical semiring. Master Thesis under supervision of Daniel Kirsten, TU Dresden Farichtung Mathematic Institute fur Algebra (2006)

    Google Scholar 

  12. Krob, D.: The equality problem for rational series with multiplicities in the tropical semiring is undecidable. In: Kuich, W. (ed.) ICALP 1992. LNCS, vol. 623, pp. 101–112. Springer, Heidelberg (1992)

    Chapter  Google Scholar 

  13. Weber, A.: Decomposing a k-valued transducer into k unambiguous ones. ITA 30(5), 379–413 (1996)

    MATH  Google Scholar 

  14. Bala, S., Koniński, A.: Unambiguous automata denoting finitely sequential functions. In: Dediu, A.-H., Martín-Vide, C., Truthe, B. (eds.) LATA 2013. LNCS, vol. 7810, pp. 104–115. Springer, Heidelberg (2013)

    Chapter  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2013 Springer-Verlag Berlin Heidelberg

About this paper

Cite this paper

Bala, S. (2013). Which Finitely Ambiguous Automata Recognize Finitely Sequential Functions?. In: Chatterjee, K., Sgall, J. (eds) Mathematical Foundations of Computer Science 2013. MFCS 2013. Lecture Notes in Computer Science, vol 8087. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40313-2_10

Download citation

  • DOI: https://doi.org/10.1007/978-3-642-40313-2_10

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-40312-5

  • Online ISBN: 978-3-642-40313-2

  • eBook Packages: Computer ScienceComputer Science (R0)

Publish with us

Policies and ethics