Language-Theoretical Representations of omega-Languages

Abstract In this paper, we give language-theoretical representations for some classes of ω- languages defined by finite automata. The classes considered in this paper are proved to be the classes of ω-languages represented as F ′ F ω , PF ω or P ′ P ω , where P and P ′ are prefix-free regular languages and F and F ′ are prefix-free finite languages.