2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/166785We prove an estimate on the difference of Maslov indices relative to the choice of two distinct reference Lagrangians of a continuous path in the Lagrangian Grassmannian of a symplectic space. We discuss some applications to the study of conjugate and focal points along a geodesic in a semi-Riemannian manifold.10 pagesDifferential Geometry53D12, 53D25, 53C22, 53C50text