2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/34961Using the canonical quantum theory of spherically symmetric pure gravitational systems, we present a direct correspondence between the Friedmann-Robertson-Walker (FRW) cosmological model in the interior of a Schwarzschild black hole and the nth energy eigenstate of a linear harmonic oscillator. Such type of universe has a quantized mass of the order of the Planck mass and harmonic oscillator wave functions7 pages, send to PRDGeneral Relativity and Quantum Cosmologytext