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We introduce a new class of nondeterministic semiautomata: A nondeterministic semiautomaton S is predictable if there exists k≥0 such that, if S knows the current input a and the next k inputs, the transition under a can be made deterministically. Nondeterminism may occur only when the length of the unread input is ≤k. We develop a theory of predictable semiautomata. We show that, if a semiautomaton...
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