Comparing complexity functions of a language and its extendable part
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 42 (2008) no. 3, pp. 647-655.

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.

DOI : 10.1051/ita:2008021
Classification : 68Q70, 68R15 
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     title = {Comparing complexity functions of a language and its extendable part},
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Shur, Arseny M. Comparing complexity functions of a language and its extendable part. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 42 (2008) no. 3, pp. 647-655. doi : 10.1051/ita:2008021. http://www.numdam.org/articles/10.1051/ita:2008021/

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