2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/171259The higher order supersymmetric partners of the Schroedinger's Hamiltonians can be explicitly constructed by iterating a simple finite difference equation corresponding to the Baecklund transformation. The method can completely replace the Crum determinants. Its limiting, differential case offers some new operational advantages.LaTeX, 12 pages, 3 figures. To appear in Phys. Lett. AQuantum Physicstext