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Parikh's Theorem: A simple and direct automaton construction (1006.3825v3)
Published 19 Jun 2010 in cs.FL
Abstract: Parikh's theorem states that the Parikh image of a context-free language is semilinear or, equivalently, that every context-free language has the same Parikh image as some regular language. We present a very simple construction that, given a context-free grammar, produces a finite automaton recognizing such a regular language.
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