Klaus Thomsen (2010)
RAIRO - Theoretical Informatics and Applications
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We give necessary and sufficient conditions for a language to be the language of finite words that occur infinitely many times in an infinite word.
Arseny M. Shur (2008)
RAIRO - Theoretical Informatics and Applications
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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.
Alexander Meduna (1986)
Kybernetika
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L. Rosaz (1995)
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
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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...