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Context-Free and Noncontext-Free Languages

Context-Free and Noncontext-Free Languages. Chapter 13. Languages That Are and Are Not Context-Free. a * b * is regular. A n B n = { a n b n : n ? 0} is context-free but not regular. A n B n C n = { a n b n c n : n ? 0} is not context-free. Of Languages and Machines.

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