Étant donné un automorphisme d’un groupe libre et un représentant topologique train-track de son inverse, on peut construire un arbre réel appelé arbre répulsif de . Le groupe libre agit sur par isométries. La dynamique engendrée par peut être représentée par l’action du groupe libre restreinte à un sous-ensemble compact bien choisi du complété métrique de . Cet article construit ce sous-ensemble sur une classe d’exemples en introduisant des opérations appelées substitutions d’arbre ; on mettra en évidence les relations entre la construction par substitution d’arbre et la dynamique symbolique sous-jacente.
Let be an automorphism of the free group. Using a train-track representative of its inverse, one can construct the repelling tree of . The free group acts on by isometries. The dynamical system generated by can be interpreted geometrically by the action of the free group restricted to a compact subset of the metric completion of . This article gives a construction of this subset on a class of examples by introducing tree substitutions. We will insist on the connections between the construction using a tree substitution and the initial symbolic dynamical system.
@article{AIF_2011__61_3_851_0, author = {Jullian, Yann}, title = {Construction du c\oe ur compact d'un arbre r\'eel par substitution d'arbre}, journal = {Annales de l'Institut Fourier}, volume = {61}, year = {2011}, pages = {851-904}, doi = {10.5802/aif.2631}, zbl = {1277.37022}, mrnumber = {2918720}, language = {fr}, url = {http://dml.mathdoc.fr/item/AIF_2011__61_3_851_0} }
Jullian, Yann. Construction du cœur compact d’un arbre réel par substitution d’arbre. Annales de l'Institut Fourier, Tome 61 (2011) pp. 851-904. doi : 10.5802/aif.2631. http://gdmltest.u-ga.fr/item/AIF_2011__61_3_851_0/
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