2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/68305We prove that the modular symbols appropriately normalized and ordered have a Gaussian distribution for all cofinite subgroups of SL_2(R). We use spectral deformations to study the poles and the residues of Eisenstein series twisted by power of modular symbols.32 pagesNumber Theory11F67; 11F72, 11M36text