Abstract: By extracting the basic properties common to the formal grammars appeared in existing literatures, we develop a general formulation of formal grammars. We define a pseudo grammar and derive from it the well-known probabilistic, fuzzy grammars and so on. Moreover, several interesting grammars such as ⊔∗ grammars, ⊔ ⊓ grammars, ⊔ ⊓ grammars, composite B-fuzzy grammars, and mixed fuzzy grammars, which have never appeared in any other papers before, are derived.
Publication Year: 1972
Publication Date: 1972-01-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 27
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