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Which of the following is called Bar-Hillel lemma?

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Which of the following is called Bar-Hillel lemma?

(a) Pumping lemma for regular language

(b) Pumping lemma for context free languages

(c) Pumping lemma for context sensitive languages

(d) None of the mentioned

I have been asked this question by my school principal while I was bunking the class.

My question is from Pumping Lemma for Context Free Language topic in portion Properties of Context Free Languages of Automata Theory

1 Answer

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Correct option is (b) Pumping lemma for context free languages

For explanation: In automata theory, the pumping lemma for context free languages, also kmown as the  Bar-Hillel lemma, represents a property of all context free languages.

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