2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/78785We show that the number of simple closed geodesics of length bounded by L on a hyperbolic surface of genus g with c cusps and b boundary components grows roughly like L^{6g+2b+2c-6}. This has been conjectured for some time.16 pages, many figuresGeometric TopologyDifferential GeometryGroup Theory57M50;34C25text