Preprints, Working Papers, ... Year : 2008

Topological Complexity of Context-Free omega-Languages: A Survey

Abstract

We survey recent results on the topological complexity of context-free omega-languages which form the second level of the Chomsky hierarchy of languages of infinite words. In particular, we consider the Borel hierarchy and the Wadge hierarchy of non-deterministic or deterministic context-free omega-languages. We study also decision problems, the links with the notions of ambiguity and of degrees of ambiguity, and the special case of omega-powers.
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Dates and versions

ensl-00286373 , version 1 (09-06-2008)
ensl-00286373 , version 2 (12-03-2013)

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Olivier Finkel. Topological Complexity of Context-Free omega-Languages: A Survey. 2008. ⟨ensl-00286373v1⟩
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