Abstract
Two-way finite automata are similar to the machines we have been studying, except that they can read the input string in either direction. We think of them as having a read head, which can move left or right over the input string. Like ordinary finite automata, they have a finite set Q of states and can be either deterministic (2DFA) or nondeterministic (2NFA).
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© 1977 Springer Science+Business Media New York
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Kozen, D.C. (1977). Two-Way Finite Automata. In: Automata and Computability. Undergraduate Texts in Computer Science. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85706-5_21
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DOI: https://doi.org/10.1007/978-3-642-85706-5_21
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