Position-restricted grammar forms and grammars☆
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This research was supported in part by NSF grants MCS 77-02470, MCS 73-03380, and MCS 77-22323. An early version of this paper was presented at the 1977 Fundamentals of Computation Theory Conference, Poznan-Kornik, Poland, September 19–23, 1977, under the title “Canonical forms of context-free grammars and position restricted grammar forms”.
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Current address: Department of Applied Science, University of California, Davis/Livermore, Livermore, CA94550, U.S.A.
Copyright © 1982 Published by Elsevier B.V.