Orbifolds of AdS(3) and fixpoints of the CFT
arXiv:hep-th/9812169 · doi:10.1002/(SICI)1521-3978(20001)48:1/3<15::AID-PROP15>3.0.CO;2-H
Abstract
The 3-d BTZ black hole represents an orbifold of gravity. The UV as well as the IR region of the CFT is governed by a gauged SL(2, R) WZW model. In the UV it corresponds to a light-cone gauging (Liouville model) whereas in the IR it is a space-like gauging (2-d black hole).
7 pages, LaTeX; minor corrections; refs added