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Torus actions on symplectic orbi-spaces |
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| Authors: | Tanya Schmah |
| Affiliation: | Département de Mathématiques, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland |
| Abstract: | Which |
| Keywords: | Symplectic orbifolds Hamiltonian torus actions centralizers of tori |
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-dimensional orbi-spaces have effective symplectic 
- torus actions? As shown by Lerman and Tolman (1997) and Watson (1997), this question reduces to that of characterizing the finite subgroups of centralizers of tori in the real symplectic group 
. We resolve this question, and generalize our method to a calculation of the centralizers of all tori in 
.