Computers and Technology, 30.03.2020 17:28 jmeza502506

Let S be the set of all strings from A* in which there is no b before an a. For example, the strings λ, aa, bbb, and aa all belong to S, but aabab ∉ S. Give a recursive definition for the set S. (Hint: a recursive rule can concatenate characters at the beginning or the end of a string.)

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Let S be the set of all strings from A* in which there is no b before an a. For example, the strings...