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The Teichmüller distance between finite index subgroups of PSL2(Z)
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Markovic, V. (Vladimir) and Šarić, Dragomir. (2008) The Teichmüller distance between finite index subgroups of PSL2(Z). Geometriae Dedicata, Vol.136 (No.1). pp. 145-165. ISSN 0046-5755
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Official URL: http://dx.doi.org/10.1007/s10711-008-9281-x
Abstract
For a given 0 , we show that there exist two finite index subgroups of PSL2(Z) which are (1+) -quasisymmetrically conjugated and the conjugation homeomorphism is not conformal. This implies that for any 0 there are two finite regular covers of the Modular once punctured torus T 0 (or just the Modular torus) and a (1+) -quasiconformal map between them that is not homotopic to a conformal map. As an application of the above results, we show that the orbit of the basepoint in the Teichmüller space T(S p ) of the punctured solenoid S p under the action of the corresponding Modular group (which is the mapping class group of S p [6], [7]) has the closure in T(S p ) strictly larger than the orbit and that the closure is necessarily uncountable.
| Item Type: | Journal Article |
|---|---|
| Subjects: | Q Science > QA Mathematics |
| Divisions: | Faculty of Science > Mathematics |
| Journal or Publication Title: | Geometriae Dedicata |
| Publisher: | Springer |
| ISSN: | 0046-5755 |
| Date: | October 2008 |
| Volume: | Vol.136 |
| Number: | No.1 |
| Page Range: | pp. 145-165 |
| Identification Number: | 10.1007/s10711-008-9281-x |
| Status: | Peer Reviewed |
| Publication Status: | Published |
| Access rights to Published version: | Restricted or Subscription Access |
| URI: | http://wrap.warwick.ac.uk/id/eprint/43747 |
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