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Earn +20 ptsQ: Are recognizable languages closed under concatenation?
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Are Turing recognizable languages closed under concatenation?
Yes, Turing recognizable languages are closed under concatenation.
Are decidable languages closed under concatenation?
Yes, decidable languages are closed under concatenation.
Are context-free languages closed under concatenation?
Yes, context-free languages are closed under concatenation.
Is the class of recognizable languages closed under complementation?
No, the class of recognizable languages is not closed under complementation.
Are Turing recognizable languages closed under intersection?
Yes, Turing recognizable languages are closed under intersection.
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