no. 1
On Christoffel classes
RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 40 (2006) no. 1, pp. 15-27.

We characterize conjugation classes of Christoffel words (equivalently of standard words) by the number of factors. We give several geometric proofs of classical results on these words and sturmian words.

DOI : 10.1051/ita:2005038
Classification : 68R15
Mots clés : words, Christoffel, sturmian, conjugation, geometric 
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     title = {On {Christoffel} classes},
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     publisher = {EDP-Sciences},
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Borel, Jean-Pierre; Reutenauer, Christophe. On Christoffel classes. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 40 (2006) no. 1, pp. 15-27. doi : 10.1051/ita:2005038. http://www.numdam.org/articles/10.1051/ita:2005038/

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