2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/1062We show that accretion disks with relativisticly hot electrons which are coupled to cold ions is subject to inertial-type instability in which kinematic drag between electrons and ions produces radial acceleration of electrons.4 pages, submitted to ApJ LettAstrophysicsInertial Instability of Accretion Disks with Relativistic Electronstext