Remarks about Commutative Context-Free L
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Juha Kortelainen
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Article
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1998
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Elsevier Science
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English
⚖ 205 KB
We prove that the complement of a commutative language L is context-free if the Parikh-map of L is a proper linear set. Some sharpenings to results considering the Fliess conjecture on commutative contextfree languages are given. A conjecture concerning commutative star languages is disproved by a c