Null productions are of the form A -> e.lf L is CFL generated by a CFG...
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Null productions are of the form A -> e.lf L is CFL generated by a CFG having A-productions, then there is a different CFG that has no A-production and still generates either the whole language L (if L does not include A) or else generate the language of all the words in L other than A. Remove A-production from the given CFG S- XY X> Zb Y> bW Z> AB A > aA | bA | A B- Ba | Bb |A Null productions are of the form A -> e.lf L is CFL generated by a CFG having A-productions, then there is a different CFG that has no A-production and still generates either the whole language L (if L does not include A) or else generate the language of all the words in L other than A. Remove A-production from the given CFG S- XY X> Zb Y> bW Z> AB A > aA | bA | A B- Ba | Bb |A
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The definition of context free grammars CFGs allows us to develop a wide variety of grammars Most of the time some of the productions of CFGs are not useful and are redundant This happens because the ... View the full answer
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