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International Conference on Language and Automata Theory and Applications

LATA 2009: Language and Automata Theory and Applications pp 279–289Cite as

On Extended Regular Expressions

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Part of the book series: Lecture Notes in Computer Science ((LNTCS,volume 5457))

Abstract

In this paper we extend the work of Campeanu, Salomaa and Yu [1] on extended regular expressions featured in the Unix utility egrep and the popular scripting language Perl. We settle the open issue of closure under intersection and provide an improved pumping lemma that will show that a larger class of languages is not recognizable by extended regular expressions. We also investigate some questions regarding extended multi-pattern languages introduced by Nagy in [2].

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References

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Authors and Affiliations

  1. Dept. of Computer Science, University at Albany–SUNY, Albany, NY 12222, USA

    Benjamin Carle & Paliath Narendran

Authors
  1. Benjamin Carle
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  2. Paliath Narendran
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Editor information

Editors and Affiliations

  1. Research Group on Mathematical Linguistics, Rovira i Virgili University, Av. Catalunya, 35, 43002, Tarragona, Spain

    Adrian Horia Dediu

  2. Research Group on Mathematical Linguistics, Universitat Rovira i Virgili, Tarragona, Spain

    Armand Mihai Ionescu

  3. European Research Council Executive Agency, 16 Place Rogier, 1210, Brussels, Belgium

    Carlos Martín-Vide

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© 2009 Springer-Verlag Berlin Heidelberg

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Carle, B., Narendran, P. (2009). On Extended Regular Expressions. In: Dediu, A.H., Ionescu, A.M., Martín-Vide, C. (eds) Language and Automata Theory and Applications. LATA 2009. Lecture Notes in Computer Science, vol 5457. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-00982-2_24

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  • DOI: https://doi.org/10.1007/978-3-642-00982-2_24

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-00981-5

  • Online ISBN: 978-3-642-00982-2

  • eBook Packages: Computer ScienceComputer Science (R0)

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