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Let be an alphabet. The symmetric difference of two languages A, B C * is defined as AAB = (ANB) U (ANB). (a) Prove
Let be an alphabet. The symmetric difference of two languages A, B C * is defined as AAB = (ANB) U (ANB). (a) Prove that if A C* is a context-free language and BC * is a finite language, the the language AAB is context-free. (b) Give an example of an alphabet , a context-free language A C*, an a regular languag BC for which the language AAB is not context-free.
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a To prove that the language AAB is contextfree given that AC is a contextfree language and BC 2 is ...
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Mobile Communications
Authors: Jochen Schiller
2nd edition
978-0321123817, 321123816, 978-8131724262
