# On the product of balanced sequences

Antonio Restivo; Giovanna Rosone

RAIRO - Theoretical Informatics and Applications (2012)

- Volume: 46, Issue: 1, page 131-145
- ISSN: 0988-3754

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topRestivo, Antonio, and Rosone, Giovanna. "On the product of balanced sequences." RAIRO - Theoretical Informatics and Applications 46.1 (2012): 131-145. <http://eudml.org/doc/221967>.

@article{Restivo2012,

abstract = {The product w = u ⊗ v of two sequences u and v is a naturally defined sequence on the alphabet of pairs of symbols. Here, we study when the product w of two balanced sequences u,v is balanced too. In the case u and v are binary sequences, we prove, as a main result, that, if such a product w is balanced and deg(w) = 4, then w is an ultimately periodic sequence of a very special form. The case of arbitrary alphabets is approached in the last section. The partial results obtained and the problems proposed show the interest of the notion of product in the study of balanced sequences. },

author = {Restivo, Antonio, Rosone, Giovanna},

journal = {RAIRO - Theoretical Informatics and Applications},

keywords = {Infinite sequences; Sturmian words; balance; product; infinite sequences},

language = {eng},

month = {3},

number = {1},

pages = {131-145},

publisher = {EDP Sciences},

title = {On the product of balanced sequences},

url = {http://eudml.org/doc/221967},

volume = {46},

year = {2012},

}

TY - JOUR

AU - Restivo, Antonio

AU - Rosone, Giovanna

TI - On the product of balanced sequences

JO - RAIRO - Theoretical Informatics and Applications

DA - 2012/3//

PB - EDP Sciences

VL - 46

IS - 1

SP - 131

EP - 145

AB - The product w = u ⊗ v of two sequences u and v is a naturally defined sequence on the alphabet of pairs of symbols. Here, we study when the product w of two balanced sequences u,v is balanced too. In the case u and v are binary sequences, we prove, as a main result, that, if such a product w is balanced and deg(w) = 4, then w is an ultimately periodic sequence of a very special form. The case of arbitrary alphabets is approached in the last section. The partial results obtained and the problems proposed show the interest of the notion of product in the study of balanced sequences.

LA - eng

KW - Infinite sequences; Sturmian words; balance; product; infinite sequences

UR - http://eudml.org/doc/221967

ER -

## References

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