String adjunct grammars: II. Equational representation, null symbols, and linguistic relevance*

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In this paper, we continue the study of String Adjunct Grammars (AG) introduced in Joshi et al. (1972). In particular, equational representations of LAG's, LAG's with null symbols, and some special cases of LAG's are studied. Linguistic relevance of these grammars is also discussed in some detail.

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*

This work was partially supported by NSF Grant GS-159, NSF Grant GP-5561 and U.S. Army Research Office, Durham (DA-31-124 ARO(D)-98).

†

Also in the Department of Linguistics. At present on leave at The Institute for Advanced Study, Princeton, NJ.

‡

Now at Johns Hopkins University, Baltimore, MD.

§

At present on leave at the Information Science Laboratory, Faculty of Science, University of Tokyo, Bunkyo-ku, Tokyo, Japan.

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