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ω-powers and descriptive set theory
Published online by Cambridge University Press: 12 March 2014
Abstract
We study the sets of the infinite sentences constructible with a dictionary over a finite alphabet, from the viewpoint of descriptive set theory. Among others, this gives some true co-analytic sets. The case where the dictionary is finite is studied and gives a natural example of a set at level ω of the Wadge hierarchy.
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- Research Article
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- Copyright © Association for Symbolic Logic 2005
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