Jacques Justin, Giuseppe Pirillo (2010)
RAIRO - Theoretical Informatics and Applications
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Here we give a characterization of Arnoux–Rauzy sequences by the way of the lexicographic orderings of their alphabet.
Amy Glen, Jacques Justin (2009)
RAIRO - Theoretical Informatics and Applications
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In this paper, we survey the rich theory of infinite which generalize to any finite alphabet, in a rather resembling way, the well-known family of on two letters. After recalling definitions and basic properties, we consider that allow for a deeper study of these words. Some properties of factors are described, including factor complexity, palindromes, fractional powers, frequencies, and return words. We also consider lexicographical properties of episturmian words, as well as their...
Gwénaël Richomme, Kalle Saari, Luca Q. Zamboni (2010)
RAIRO - Theoretical Informatics and Applications
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Among the various ways to construct a characteristic Sturmian word, one of the most used consists in defining an infinite sequence of prefixes that are standard. Nevertheless in any characteristic word , some standard words occur that are not prefixes of . We characterize all standard words occurring in any characteristic word (and so in any Sturmian word) using firstly morphisms, then standard prefixes and finally palindromes.
Jacques Justin (2010)
RAIRO - Theoretical Informatics and Applications
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Fine and Wilf's theorem has recently been extended to words having three periods. Following the method of the authors we extend it to an arbitrary number of periods and deduce from that a characterization of generalized Arnoux-Rauzy sequences or episturmian infinite words.
L'ubomíra Balková, Edita Pelantová, Štěpán Starosta (2010)
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
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The properties characterizing sturmian words are considered for words on multiliteral alphabets. We summarize various generalizations of sturmian words to multiliteral alphabets and enlarge the list of known relationships among these generalizations. We provide a new equivalent definition of rich words and make use of it in the study of generalizations of sturmian words based on palindromes. We also collect many examples of infinite words to illustrate differences in the generalized...