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Erik Jonsson School of Engineering and Computer Science FEARLESS Engineeringwww.utdallas.edu/~pervin CS 5349.001 CS 4384 – HON001 Automata Theory http://www.utdallas.edu/~pervin Tuesday: Sections 2.4 & 2.5 Lectures 3 & 4 Look at Ullman’s Lectures 3 & 4 Thursday 09-04-13 1

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SYLLABUS SyllabusOfficialS2013.docx 2 Final Exam: Thursday, 18 December 2014 8:00am – 10:45am in our regular classroom

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Reducing the Number of States in a Finite Automata 3

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4 Note: This divides the states into equivalence classes.

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9 Example:

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10 Example:

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14 Note: All states reachable

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16answer L(M) = Strings of even length ending with ‘a’.

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A non-regular language 18

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19Martin, P. 76

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Nondeterministic Finite Automata (NDA) M&S Section 2.4 20

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Martin P.9721

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Martin P.99 (incorrect)22

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Nondeterministic Finite Automata 23

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27 Find an NFA that accepts the set of binary strings beginning with 010 or ending with 110.

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28 Comment: For every NFA there is an equivalent NFA that has only one initial state and only one accepting (final) state.

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31 Construct a NFA that accepts the language: (a) The set of binary strings that contain at least three occurrences of the substring 010.

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32 Construct a NFA that accepts the language: (b) The set of binary strings that contain both substrings 010 and 101.

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Theorem: If L = L(N) for a NFA N, then L = L(D) for a DFA D. Linz P.6133

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35Linz, P.62

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