The Lambek-Grishin Calculus Is NP-Complete

  • Jeroen Bransen
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7395)


The Lambek-Grishin calculus LG is the symmetric extension of the non-associative Lambek calculus NL. In this paper we prove that the derivability problem for LG is NP-complete.


Inference Rule Conjunctive Normal Form Logical Rule Boolean Formula Satisfying Assignment 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Jeroen Bransen
    • 1
  1. 1.Utrecht UniversityThe Netherlands

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