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Homework Help: Formal Languages and Automata

  1. Oct 25, 2011 #1
    1. The problem statement, all variables and given/known data

    [PLAIN]http://img577.imageshack.us/img577/1948/dfav.jpg [Broken]

    3. The attempt at a solution

    For the first part, am I interpreting the langauage L correctly as words of length multiples of 4? Would the following DFA accept this L:
    [PLAIN]http://img685.imageshack.us/img685/6026/dfa2.jpg [Broken]

    For the 2nd part, is the language recognised by the DFA: [itex]L(\mathcal{A})=\{ab\}^{*} = \{ \varepsilon, ab, (ab)^2, (ab)^3, \cdots \} = \{ (ab)^n : n\geq 0 \}[/itex] ?

    How do I express the language recognised by the final DFA [itex]\mathcal{B}[/itex] ?
    Last edited by a moderator: May 5, 2017
  2. jcsd
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