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A note on the amenable subgroups of PSL (2,R) |
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| Authors: | Claudio Nebbia |
| Affiliation: | (1) Dipartimento di Matematica G. Castelnuovo, Università degli studi di Roma La Sapienza, Città Universitaria, I-00187 Roma, Italy |
| Abstract: | In this note we give a characterization of the amenable subgroups of PSL (2,R) in terms of the action on the hyperbolic half-plane.This work was partially supported by G.N.A.F.A. of the C.N.R., Italy. |
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