2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/228955We show that some riemannian manifolds diffeomorphic to the sphere have the property that the cut loci of general points are smoothly embedded closed disks of codimension one. Ellipsoids with distinct axes are typical examples of such manifolds.40 pagesDifferential Geometry53C22text