Automata on infinite words have gained a great deal of importance since their first definition some forty years ago. Apart from the interests from a theoretical point of view they have practical importance for the specification and verification of reactive systems that are not supposed to terminate at some point of time. Operating systems are an example of such systems, as they should be ready to process any user input as it is entered, without terminating after or during some task.
KeywordsExpressive Power Regular Language Transition Graph Acceptance Condition Input Word
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