2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54677Quantum theory of 2d gravity is examined by including a special quantum correction, which corresponds to the open string loop corrections and provides a new conformal anomaly for the corresponding $σ$ model. This anomaly leads to the condensation of the tachyon, and the resultant effective theory implies a possibility of extending the 2d gravity to the case of $c>1$.13 pages, latexHigh Energy Physics - Theorytext