2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/199049The propagator of three-dimensional Aharonov-Bohm-Coulomb system is calculated by following the Duru-Kleinert method. It is shown that the system is reduced to two independent two dimensional Aharonov-Bohm plus harmonic oscillator systems through dimensional extension and Kustaanheimo-Stiefel transformation. The energy spectrum is deduced.10 pages, some statements are correctedQuantum Physicstext