String grammars with disconnecting

  • Klaus-Jörn Lange
  • Emo Welzl
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 199)


The complexity of languages generated by context-free grammars with disconnecting is investigated. It is shown that even linear and deterministic context-free languages can generate languages of multisets, the membership problem of which is NP-complete. In contrast to that, this problem is in DSPACE(log n) for regular sets.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1985

Authors and Affiliations

  • Klaus-Jörn Lange
    • 1
  • Emo Welzl
    • 2
  1. 1.Fachbereich InformatikUniversität HamburgHamburg 13FRG
  2. 2.Institutes for Information Processing Technical University of Graz and Austrian Computer SocietyGrazAustria

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