Automata-Theoretic techniques for modal logics of programs
Journal of Computer and System Sciences
On measuring nondeterminism in regular languages
Information and Computation
Handbook of theoretical computer science (vol. B)
On the relation between ambiguity and nondeterminism in finite automata
Information and Computation
Reasoning about infinite computations
Information and Computation
Automata, Languages, and Machines
Automata, Languages, and Machines
Introduction To Automata Theory, Languages, And Computation
Introduction To Automata Theory, Languages, And Computation
Automata logics, and infinite games
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Nondeterminism and ambiguity in abstract machines can be consider as consumable resources. This was first done by Goldstine, Kintala and Wotschke for finite automata. We extend their method to finite automata which accept words of infinite length, so-called regular ω-automata. We classify the automata with respect to the amount of nondeterminism and ambiguity that is needed to accept a corresponding regular ω-language and present examples for each of the classes. It is a well-known fact that the deterministic regular ω-languages are a proper subset of the nondeterministic ones. Hence we specify the amount of nondeterminism and ambiguity that is necessary to accept a nondeterministic regular ω-language. Finally, we show for all possible amounts of nondeterminism that there is no interrelation between nondeterminism and ambiguity.