RAIRO-Theor. Inf. Appl.
Volume 34, Number 1, January/February 2000
|Page(s)||77 - 86|
|Published online||15 April 2002|
A characterization of poly-slender context-free languages
Turku Centre for Computer Science TUCS,
20520 Turku, Finland.
2 Research supported by the Academy of Finland, Project 137358. On leave of absence from Faculty of Mathematics, University of Bucharest, Str. Academiei 14, 70109 Bucharest, Romania.
3 Department of Computer Science, Leiden University, P.O. Box 9512, 2300 RA Leiden, The Netherlands and Department of Computer Science, University of Colorado at Boulder, Boulder, CO 80309, U.S.A.
4 Turku Centre for Computer Science TUCS, 20520 Turku, Finland.Department of Computer Science, Leiden University, P.O. Box 9512, 2300 RA Leiden, The Netherlands and Department of Computer Science, University of Colorado at Boulder, Boulder, CO 80309, U.S.A.
Accepted: 8 February 2000
For a non-negative integer k, we say that a language L is k-poly-slender if the number of words of length n in L is of order . We give a precise characterization of the k-poly-slender context-free languages. The well-known characterization of the k-poly-slender regular languages is an immediate consequence of ours.
Mathematics Subject Classification: 68Q45 / 68Q70
Key words: Context-free language / poly-slender language / Dyck loop.
© EDP Sciences, 2000
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