Course Solutions Uncategorized (Solved) : Need Help Figuring Answers H W Would Work Need Y Ur Help Chegg Q32941340 . . . .

(Solved) : Need Help Figuring Answers H W Would Work Need Y Ur Help Chegg Q32941340 . . . .

 

Need help figuring out the answers..
Hㅇw would this work..?

3. Closure Prove or disprove the following claims: (a) The set of context-free languages over some fixed alphabet is closed under the operation of taking subsets (that is, if L1 is context-free and L2 C L1, then L2 is context-free.) (b) The set of context-free languages over some fixed alphabet Σ is closed under Kleene star. e) The set of Turing-decidable languages over some fixed alphabet Σ is closed under Kleene star. (d) Let A and B be sets of languages over some fixed alphabet , with AC B. If A is closed under some operation P, then B is also closed under P
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