2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/139228Let (M,g) be a complete, simply connected Riemannian manifold of dimension 3 without conjugate points. We show that M is a hyperbolic manifold of constant sectional curvature, provided M is asymptotically harmonic of constant h > 0.4 pagesDifferential Geometry53C20text