An aperiodicity problem for multiwords

Véronique Bruyère; Olivier Carton; Alexandre Decan; Olivier Gauwin; Jef Wijsen

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications (2012)

  • Volume: 46, Issue: 1, page 33-50
  • ISSN: 0988-3754

Abstract

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Multiwords are words in which a single symbol can be replaced by a nonempty set of symbols. They extend the notion of partial words. A word w is certain in a multiword M if it occurs in every word that can be obtained by selecting one single symbol among the symbols provided in each position of M. Motivated by a problem on incomplete databases, we investigate a variant of the pattern matching problem which is to decide whether a word w is certain in a multiword M. We study the language CERTAIN(w) of multiwords in which w is certain. We show that this regular language is aperiodic for three large families of words. We also show its aperiodicity in the case of partial words over an alphabet with at least three symbols.

How to cite

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Bruyère, Véronique, et al. "An aperiodicity problem for multiwords." RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications 46.1 (2012): 33-50. <http://eudml.org/doc/272983>.

@article{Bruyère2012,
abstract = {Multiwords are words in which a single symbol can be replaced by a nonempty set of symbols. They extend the notion of partial words. A word w is certain in a multiword M if it occurs in every word that can be obtained by selecting one single symbol among the symbols provided in each position of M. Motivated by a problem on incomplete databases, we investigate a variant of the pattern matching problem which is to decide whether a word w is certain in a multiword M. We study the language CERTAIN(w) of multiwords in which w is certain. We show that this regular language is aperiodic for three large families of words. We also show its aperiodicity in the case of partial words over an alphabet with at least three symbols.},
author = {Bruyère, Véronique, Carton, Olivier, Decan, Alexandre, Gauwin, Olivier, Wijsen, Jef},
journal = {RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications},
keywords = {pattern matching; aperiodicity; partial words},
language = {eng},
number = {1},
pages = {33-50},
publisher = {EDP-Sciences},
title = {An aperiodicity problem for multiwords},
url = {http://eudml.org/doc/272983},
volume = {46},
year = {2012},
}

TY - JOUR
AU - Bruyère, Véronique
AU - Carton, Olivier
AU - Decan, Alexandre
AU - Gauwin, Olivier
AU - Wijsen, Jef
TI - An aperiodicity problem for multiwords
JO - RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
PY - 2012
PB - EDP-Sciences
VL - 46
IS - 1
SP - 33
EP - 50
AB - Multiwords are words in which a single symbol can be replaced by a nonempty set of symbols. They extend the notion of partial words. A word w is certain in a multiword M if it occurs in every word that can be obtained by selecting one single symbol among the symbols provided in each position of M. Motivated by a problem on incomplete databases, we investigate a variant of the pattern matching problem which is to decide whether a word w is certain in a multiword M. We study the language CERTAIN(w) of multiwords in which w is certain. We show that this regular language is aperiodic for three large families of words. We also show its aperiodicity in the case of partial words over an alphabet with at least three symbols.
LA - eng
KW - pattern matching; aperiodicity; partial words
UR - http://eudml.org/doc/272983
ER -

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