Geodesic
Conjugacy of Coxeter elements.
The electronic journal of combinatorics, The Björner Festschrift volume, Tome 16 (2009) no. 2
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For a Coxeter group $(W,S)$, a permutation of the set $S$ is called a Coxeter word and the group element represented by the product is called a Coxeter element. Moving the first letter to the end of the word is called a rotation and two Coxeter elements are rotation equivalent if their words can be transformed into each other through a sequence of rotations and legal commutations. We prove that Coxeter elements are conjugate if and only if they are rotation equivalent. This was known for some special cases but not for Coxeter groups in general.
DOI : 10.37236/70
Classification : 20F55, 20E45, 05C25, 20F05
Mots-clés : Coxeter elements, conjugacy classes, Coxeter groups, Coxeter words, rotation equivalent words 
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     author = {Henrik Eriksson and Kimmo Eriksson},
     title = {Conjugacy of {Coxeter} elements.},
     journal = {The electronic journal of combinatorics},
     year = {2009},
     volume = {16},
     number = {2},
     doi = {10.37236/70},
     zbl = {1161.20034},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/70/}
}
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Henrik Eriksson; Kimmo Eriksson. Conjugacy of Coxeter elements.. The electronic journal of combinatorics, The Björner Festschrift volume, Tome 16 (2009) no. 2. doi: 10.37236/70

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