The omega-inequality problem for concatenation hierarchies of star-free languages

Published 29 Jan 2016 in math.GR and cs.FL | (1601.08237v2)

Abstract: The problem considered in this paper is whether an inequality of omega-terms is valid in a given level of a concatenation hierarchy of star-free languages. The main result shows that this problem is decidable for all (integer and half) levels of the Straubing-Th\'erien hierarchy.

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