| 1. | Example 2 above ), while the class of regular languages is not.
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| 2. | In particular star-free languages are a proper decidable subclass of regular languages.
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| 3. | For converse, see construction of a ?-regular language for a B�chi automaton.
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| 4. | DFAs recognize the set of regular languages and no other languages.
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| 5. | Regular languages of star-height 0 are also known as star-free languages.
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| 6. | For a practical test that exactly characterizes regular languages, see the Myhill-Nerode theorem.
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| 7. | Thus, every context-free language is commutatively equivalent to some regular language.
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| 8. | The above closure properties imply that NFAs only recognize regular languages.
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| 9. | This class is very limited; it equals the regular languages.
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| 10. | The family of regular languages are contained within any cone ( full trio ).
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