2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/13180We investigate wave amplification through the Electron Cyclotron Maser mechanism. We derive a semi-analytic approximation formula giving the frequencies at which the absorption coefficient is negative. The coefficients still need to be computed to obtain the largest, and therefore the dominant, coefficient.7 pages, 8 figuresAstrophysicstext