Lecture 11 Context-Free Grammar. Definition. A context-free grammar (CFG) G is a quadruple (V, Î£ , R, S) where V : a set of non-terminal symbols Î£ : a set of terminals ( V âˆ© Î£ = Ç¾ ) R : a set of rules ( R: V â†’ (V U Î£ )* ) S : a start symbol. Example. V = {q, f,} Î£ = {0, 1}

Lecture 11 Context-Free Grammar

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