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Transposition errors in context-free languages

✍ Scribed by K. Humenik; R.S. Pinkham


Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
789 KB
Volume
18
Category
Article
ISSN
0164-1212

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Bracketed context-free languages
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A bracketed grammar is a context-free grammar in which indexed brackets are inserted around the right-hand sides of the rules. The language generated by a bracketed grammar is a bracketed language. An algebraic condition is given for one bracketed language to be a subset of another. The intersection

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In this paper we investigate languages containing at most a bounded number of words of each length. We first show that the context-free languages for which the number of words of every length is bounded by a fixed polynomial are exactly the bounded context-free languages in the sense of . Thus, we p

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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