Volume 23, Issue 5, 24 November 1986, Pages 271-274. Information Processing Letters. A note on pure grammars☆. Author links open overlay panel
A NOTE ON PURE GRAMMARS * Erkki ~INEN - ScienceDirect.com
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Nov 24, 1986 · In a pure grammar, no distinction is made between terminals and nonterminals. The genera- tive capacity of pure grammars is much weaker.
A new syntactic model, called pure two-dimensional (2D) context-free grammar (P2DCFG), is introduced based on the notion of pure context-free string grammar ...
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In this paper, we address several open problems concerning pure grammar systems (pGSs) and their controlled versions. More specifically, we prove the ...
The notion of “pure grammar” is introduced as a semi-Thue system with no non-terminals. The basic properties of pure grammars and the “pure languages” that they ...
The notion of “pure grammar” is introduced as a semi-Thue system with no non-terminals and “definite Turing machines” that accept pure languages, ...
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Languages generated by the pure grammars are called pure languages or also the languages of the sentential forms. Definition 1 A pure grammar of type 0 is a ...
A note on phrase structure grammars. / Chomsky, Noam. In: Information and Control, Vol. 2, No. 4, 12.1959, p. 393-395. ... Chomsky, Noam. / A note on phrase ...
(I) Grammar systems consist of several context-free grammars, referred to as their components, which mutually cooperate and, in this way, generate the languages.
We consider several types of pure grammars and systems as language acceptors and compare them to their generating counterparts. In contrast with the case ...