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I need only part (b) of this question. So please solve only part (b). 6. (a) Prove that the family of context-free languages is not
I need only part (b) of this question. So please solve only part (b).
6. (a) Prove that the family of context-free languages is not closed under difference in general,
but it is closed under regular difference, that is, if L1 is context-free and L2 is regular, then
L1 1 L2 is context-free.
(b) Show that the family of deterministic context-free languages is not closed under union and
intersection.
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