2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/57427A transformation is found between the one dimensional Schroedinger equation and a pendulum problem. It is demonstrated how to construct exact solutions with the resulted pendulum equation. The relation of this transformation to the Zakharov-Shabat equations is pointed out.4 pages, 3 figuresMathematical PhysicsQuantum Physicstext