Abstract
A hierarchy of sets of infinite (valued) trees is introduced which has no counterpart in the theory of sets of infinite strings ("ω-languages"). As a consequence we obtain that for sets of infinite trees an analogue of McNaughton's fundamental theorem on ω-languages does not hold.
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© 1982 Springer-Verlag Berlin Heidelberg
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Thomas, W. (1982). A hierarchy of sets of infinite trees. In: Cremers, A.B., Kriegel, HP. (eds) Theoretical Computer Science. Lecture Notes in Computer Science, vol 145. Springer, Berlin, Heidelberg. https://doi.org/10.1007/BFb0036493
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DOI: https://doi.org/10.1007/BFb0036493
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