GPSG-Recognition is NP-Hard

Proponents of generalized phrase structure grammar (GPSG) cite its weak context-free generative power as proof of the computational tractability of GPSG-Recognition. Since context-free languages (CFLs) can be parsed in time proportional to the cube of the sentence length, and GPSGs only genera...

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Bibliographic Details
Main Author: Ristad, Eric Sven
Language:en_US
Published: 2004
Subjects:
Online Access:http://hdl.handle.net/1721.1/5615