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Unidirectional Lambek Grammars in Polynomial Time

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Abstract

Lambek grammars provide a useful tool for studying formal and natural languages. The generative power of unidirectional Lambek grammars equals that of context-free grammars. However, no feasible algorithm was known for deciding membership in the corresponding formal languages. In this paper we present a polynomial algorithm for deciding whether a given word belongs to a language generated by a given unidirectional Lambek grammar.

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Correspondence to Yury Savateev.

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This research was supported in part by the Russian Foundation for Basic Research grant 08-01-00399, and by the Dutch-Russian cooperation program NWO/RFBR, project No. 047.017.014.

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Savateev, Y. Unidirectional Lambek Grammars in Polynomial Time. Theory Comput Syst 46, 662–672 (2010). https://doi.org/10.1007/s00224-009-9208-4

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  • DOI: https://doi.org/10.1007/s00224-009-9208-4

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