cfg - CONTEXT FREE LANGUAGES CONTEXT-FREE LANGUAGES...

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CONTEXT FREE LANGUAGES
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CONTEXT-FREE LANGUAGES REGULAR CONTEXT-FREE Context-Free Grammars Push-Down Automata
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IDEA Remember ”balanced parantheses” example from structural induction?
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IDEA Remember ”balanced parantheses” example from structural induction? S = ( S ) S
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IDEA Remember ”balanced parantheses” example from structural induction? S = ( S ) S S −→ ( S ) S | If we write it this way:
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IDEA Remember ”balanced parantheses” example from structural induction? S = ( S ) S it is a context-free grammar generating a context-free language con- taining all balanced parantheses strings. S −→ ( S ) S | If we write it this way:
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CONTEXT-FREE GRAMMARS A context-free grammar is a tuple G = ( V, T, P, S ) where V is finite set of variables or nonterminals . T is a finite set of terminals . V T = S V is a unique start symbol . P is a finite set of productions (rules).
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CONTEXT-FREE GRAMMARS A context-free grammar is a tuple G = ( V, T, P, S ) where V is finite set of variables or nonterminals .
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