# On the distribution of characteristic parameters of words II

• Volume: 36, Issue: 1, page 97-127
• ISSN: 0988-3754

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## Abstract

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The characteristic parameters Kw and Rw of a word w over a finite alphabet are defined as follows: Kw is the minimal natural number such that w has no repeated suffix of length Kw and Rw is the minimal natural number such that w has no right special factor of length Rw. In a previous paper, published on this journal, we have studied the distributions of these parameters, as well as the distribution of the maximal length of a repetition, among the words of each length on a given alphabet. In this paper we give the exact values of these distributions in a special case. However, these values give upper bounds to the distributions in the general case. Moreover, we study the most frequent and the average values of the characteristic parameters and of the maximal length of a repetition over the set of all words of length n.

## How to cite

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Carpi, Arturo, and de Luca, Aldo. "On the distribution of characteristic parameters of words II." RAIRO - Theoretical Informatics and Applications 36.1 (2010): 97-127. <http://eudml.org/doc/92693>.

@article{Carpi2010,
abstract = { The characteristic parameters Kw and Rw of a word w over a finite alphabet are defined as follows: Kw is the minimal natural number such that w has no repeated suffix of length Kw and Rw is the minimal natural number such that w has no right special factor of length Rw. In a previous paper, published on this journal, we have studied the distributions of these parameters, as well as the distribution of the maximal length of a repetition, among the words of each length on a given alphabet. In this paper we give the exact values of these distributions in a special case. However, these values give upper bounds to the distributions in the general case. Moreover, we study the most frequent and the average values of the characteristic parameters and of the maximal length of a repetition over the set of all words of length n. },
author = {Carpi, Arturo, de Luca, Aldo},
journal = {RAIRO - Theoretical Informatics and Applications},
keywords = {Special factor; characteristic parameter; repeated factor.; repeated factor; characteristic parameters },
language = {eng},
month = {3},
number = {1},
pages = {97-127},
publisher = {EDP Sciences},
title = {On the distribution of characteristic parameters of words II},
url = {http://eudml.org/doc/92693},
volume = {36},
year = {2010},
}

TY - JOUR
AU - Carpi, Arturo
AU - de Luca, Aldo
TI - On the distribution of characteristic parameters of words II
JO - RAIRO - Theoretical Informatics and Applications
DA - 2010/3//
PB - EDP Sciences
VL - 36
IS - 1
SP - 97
EP - 127
AB - The characteristic parameters Kw and Rw of a word w over a finite alphabet are defined as follows: Kw is the minimal natural number such that w has no repeated suffix of length Kw and Rw is the minimal natural number such that w has no right special factor of length Rw. In a previous paper, published on this journal, we have studied the distributions of these parameters, as well as the distribution of the maximal length of a repetition, among the words of each length on a given alphabet. In this paper we give the exact values of these distributions in a special case. However, these values give upper bounds to the distributions in the general case. Moreover, we study the most frequent and the average values of the characteristic parameters and of the maximal length of a repetition over the set of all words of length n.
LA - eng
KW - Special factor; characteristic parameter; repeated factor.; repeated factor; characteristic parameters
UR - http://eudml.org/doc/92693
ER -

## References

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1. A. Carpi and A. de Luca, Words and special factors. Theoret. Comput. Sci.259 (2001) 145-182.  Zbl0973.68191
2. A. Carpi and A. de Luca, Semiperiodic words and root-conjugacy. Theoret. Comput. Sci. (to appear).  Zbl1063.68081
3. A. Carpi and A. de Luca, Periodic-like words, periodicity, and boxes. Acta Informatica37 (2001) 597-618.  Zbl0973.68192
4. A. Carpi and A. de Luca, On the distribution of characteristic parameters of words. RAIRO: Theoret. Informatics Appl.36 (2002) 99-128.  Zbl1032.68125
5. A. Carpi, A. de Luca and S. Varricchio, Words, univalent factors, and boxes. Acta Informatica38 (2002) 409-436.  Zbl1025.68052
6. N.J. Fine and H.S. Wilf, Uniqueness theorem for periodic functions. Proc. Amer. Math. Soc.16 (1965) 109-114.  Zbl0131.30203
7. G.H. Hardy and E.M. Wright, An Introduction to the Theory of Numbers. Oxford University Press, Oxford, UK (1979).  Zbl0423.10001
8. J.D. Kececioglu and E.W. Myers, Combinatorial algorithms for DNA sequence assembly. Algorithmica13 (1995) 7-51.  Zbl0831.92013
9. M. Lothaire, Combinatorics on Words, 2nd Edition. Cambridge Mathematical Library, Cambridge University Press, Cambridge, UK (1997).  Zbl0874.20040
10. F. Mignosi, A. Restivo and M. Sciortino, Forbidden factors and fragment assembly. RAIRO: Theoret. Informatics Appl. (to appear).  Zbl1005.68122

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