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Comparing Complexity Functions of a Language and Its Extendable Part

Arseny M. Shur

RAIRO - Theoretical Informatics and Applications (2008)

  • Volume: 42, Issue: 3, page 647-655
  • ISSN: 0988-3754

Abstract

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Right (left, two-sided) extendable part of a language consists of all words having infinitely many right (resp. left, two-sided) extensions within the language. We prove that for an arbitrary factorial language each of these parts has the same growth rate of complexity as the language itself. On the other hand, we exhibit a factorial language which grows superpolynomially, while its two-sided extendable part grows only linearly.

How to cite

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Shur, Arseny M.. "Comparing Complexity Functions of a Language and Its Extendable Part." RAIRO - Theoretical Informatics and Applications 42.3 (2008): 647-655. <http://eudml.org/doc/250371>.

@article{Shur2008,
abstract = { Right (left, two-sided) extendable part of a language consists of all words having infinitely many right (resp. left, two-sided) extensions within the language. We prove that for an arbitrary factorial language each of these parts has the same growth rate of complexity as the language itself. On the other hand, we exhibit a factorial language which grows superpolynomially, while its two-sided extendable part grows only linearly. },
author = {Shur, Arseny M.},
journal = {RAIRO - Theoretical Informatics and Applications},
keywords = {combinatorial complexity},
language = {eng},
month = {6},
number = {3},
pages = {647-655},
publisher = {EDP Sciences},
title = {Comparing Complexity Functions of a Language and Its Extendable Part},
url = {http://eudml.org/doc/250371},
volume = {42},
year = {2008},
}

TY - JOUR
AU - Shur, Arseny M.
TI - Comparing Complexity Functions of a Language and Its Extendable Part
JO - RAIRO - Theoretical Informatics and Applications
DA - 2008/6//
PB - EDP Sciences
VL - 42
IS - 3
SP - 647
EP - 655
AB - Right (left, two-sided) extendable part of a language consists of all words having infinitely many right (resp. left, two-sided) extensions within the language. We prove that for an arbitrary factorial language each of these parts has the same growth rate of complexity as the language itself. On the other hand, we exhibit a factorial language which grows superpolynomially, while its two-sided extendable part grows only linearly.
LA - eng
KW - combinatorial complexity
UR - http://eudml.org/doc/250371
ER -

References

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  7. Y. Kobayashi, Repetition-free words. Theor. Comput. Sci.44 (1986) 175–197.  
  8. Y. Kobayashi, Enumeration of irreducible binary words. Discrete Appl. Math.20 (1988) 221–232.  
  9. A. Lepistö, A characterization of 2+-free words over a binary alphabet. Turku Centre for Computer Science, TUCS Tech. Report 74 (1996).  
  10. M. Morse and G.A. Hedlund, Symbolic dynamics. Amer. J. Math.60 (1938) 815–866.  
  11. A.M. Shur, Combinatorial complexity of rational languages. Discrete Anal. Oper. Res. 112 (2005) 78–99 (Russian).  
  12. A.M. Shur, On intermediate factorial languages. Turku Centre for Computer Science, TUCS Tech. Report 723 (2005).  

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