On the Recognizing Power of the Lambek Calculus with Brackets

Journal of Logic, Language and Information 27 (4):295-312 (2018)
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Abstract

Every language recognized by the Lambek calculus with brackets is context-free. This is shown by combining an observation by Jäger with an entirely straightforward adaptation of the method Pentus used for the original Lambek calculus. The case of the variant of the calculus allowing sequents with empty antecedents is slightly more complicated, requiring a restricted use of the multiplicative unit.

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References found in this work

The Mathematics of Sentence Structure.Joachim Lambek - 1958 - Journal of Symbolic Logic 65 (3):154-170.
Multimodal linguistic inference.Michael Moortgat - 1996 - Journal of Logic, Language and Information 5 (3-4):349-385.
Multimodal Linguistic Inference.Michael Moortgat - 1995 - Logic Journal of the IGPL 3 (2-3):371-401.
Product-free Lambek calculus and context-free grammars.Mati Pentus - 1997 - Journal of Symbolic Logic 62 (2):648-660.
Computing interpolants in implicational logics.Makoto Kanazawa - 2006 - Annals of Pure and Applied Logic 142 (1):125-201.

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