2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/196240We descry and discuss a duality in 2-dimensional dilaton gravity.13 pages, 2 eps-figures, v2: added 2 references and a particular example (CGHS as dual of Liouville)High Energy Physics - TheoryGeneral Relativity and Quantum CosmologyMathematical Physicstext