Group theoretical derivation of Liouville action for Regge surfaces
arXiv:gr-qc/9707023 · doi:10.1016/S0550-3213(98)00124-2
Abstract
We show that the structure of the Liouville action on a two dimensional Regge surface of the topology of the sphere and of the torus is determined by the invariance under the transformations induced by the conformal Killing vector fields and under modular transformations.
10 pages, LaTex file