2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33711The classical central charge for the higher curvature gravity in 3-dimensions is calculated using the Legendre transformation method. The statistical entropy of BTZ black hole is derived by the Cardy's formula and the result completely coincides with the Iyer-Wald formula for the geometrical entropy. This coincidence suggests the generalized AdS/CFT correspondence.2 pages, talk given at MG9, Rome, Italy 2000General Relativity and Quantum Cosmologytext