منابع مشابه
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is the constant of the pumping lemma, the pumped substring cannot be longer than k, and therefore the only other place we might be able to pump would be in the middle as and the middle cs, But this would result in violating the condit ion that l may not be greater than i. Thus, z cannot be pumped without violating the pumping lemma, and hence (7) is not context free. Since context f ree languag...
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ژورنال
عنوان ژورنال: Communications of the ACM
سال: 1993
ISSN: 0001-0782,1557-7317
DOI: 10.1145/159544.376068