Nous décrivons les groupes d'isométries du plan hyperbolique complexe engendrés par deux éléments loxodromiques. Nous donnons une condition pour qu'un tel groupe soit décomposable en en un groupe engendré par trois involutions antiholomorphes, et utilisons ces décompositions pour décrire une boule de dimension trois dans l'espace de Teichmüller du tore épointé dans .
We describe isometry groups of the complex hyperbolic plane generated by two loxodromic motions. We give then a condition for such a group to be decomposable as a group generated by 3 antiholomorphic involutions, and use this decomposition to describe a 3-dimensional ball in the Teichmüller space of the once punctured torus.
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@article{CRMATH_2005__340_5_353_0, author = {Will, Pierre}, title = {Lagrangian decomposability of some two-generator subgroups of $ \mathrm{PU}(2,1)$}, journal = {Comptes Rendus. Math\'ematique}, pages = {353--358}, publisher = {Elsevier}, volume = {340}, number = {5}, year = {2005}, doi = {10.1016/j.crma.2005.01.008}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.crma.2005.01.008/} }
TY - JOUR AU - Will, Pierre TI - Lagrangian decomposability of some two-generator subgroups of $ \mathrm{PU}(2,1)$ JO - Comptes Rendus. Mathématique PY - 2005 SP - 353 EP - 358 VL - 340 IS - 5 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.crma.2005.01.008/ DO - 10.1016/j.crma.2005.01.008 LA - en ID - CRMATH_2005__340_5_353_0 ER -
%0 Journal Article %A Will, Pierre %T Lagrangian decomposability of some two-generator subgroups of $ \mathrm{PU}(2,1)$ %J Comptes Rendus. Mathématique %D 2005 %P 353-358 %V 340 %N 5 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.crma.2005.01.008/ %R 10.1016/j.crma.2005.01.008 %G en %F CRMATH_2005__340_5_353_0
Will, Pierre. Lagrangian decomposability of some two-generator subgroups of $ \mathrm{PU}(2,1)$. Comptes Rendus. Mathématique, Tome 340 (2005) no. 5, pp. 353-358. doi : 10.1016/j.crma.2005.01.008. http://www.numdam.org/articles/10.1016/j.crma.2005.01.008/
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