581 articles – 596 Notices  [english version]
HAL : hal-00718704, version 1

Fiche détaillée  Récupérer au format
Communications in Analysis and Geometry 20, 2 (2012) p. 369-395
The behaviour of Fenchel-Nielsen distance under a change of pants decomposition
Athanase Papadopoulos 1, Lixin Liu 2, Daniele Alessandrini 3, Weixu Su 4
(2012)

Given a topological orientable surface S of finite or infinite type equipped with a pair of pants decomposition P and given a base complex structure X on S, there is an associated deformation space of complex structures on S, which we call the Fenchel-Nielsen Teichmülller space associated to the pair (P,X). This space carries a metric, which we call the Fenchel-Nielsen metric, defined using Fenchel-Nielsen coordinates. We studied this metric in previous papers, and we compared it with the classical Teichmüller metric (defined using quasi-conformal mappings) and to the length spectrum metric (defined using ratios of hyperbolic lengths of simple closed curves). In the present paper, we show that under a change of pair of pants decomposition, the identity map between the corresponding Fenchel-Nielsen metrics is not necessarily bi- Lipschitz. These results complement results obtained in the previous papers and they show that these previous results are optimal.
1 :  Institut de Recherche Mathématique Avancée (IRMA)
CNRS : UMR7501 – Université de Strasbourg
2 :  Department of Mathematics
Zhongshan University
3 :  Département de Mathématiques, Université de Fribourg
Département de Mathématiques, Université de Fribourg
4 :  Fudan University
Fudan University
Mathématiques/Topologie géométrique
Teichmüller space – Fenchel-Nielsen coordinates – Fenchel-Nielsen metric