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Recall that string x is a prefix of string y if a string z exists where xz = y, and that x is a proper
- Recall that string x is a prefix of string y if a string z exists where xz = y, and that x is a proper prefix of y if in addition x 6 = y. In each of the following parts, we define an operation on a language A. Show that the class of regular languages is closed under that operation. Aa. NOPREFIX (A) = {w ∈ A| no proper prefix of w is a member of A}. b. NOEXTEND(A) = {w ∈ A| w is not the proper prefix of any string in A}.
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