2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/98590We prove that the Hilbert geometry of a convex domain in the plane is Gromov hyperbolic, if, and only if, the bottom of its spectrum is not zero27 pages, 2 figuresDifferential GeometryMetric GeometryBas du spectre et delta-hyperbolicité en géométrie de Hilbert planetext