2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/3510Notwithstanding recent claims by Richard et al., there is no linear hydrodynamic instability of axisymmetrically stable disks in the local limit. We prove this by means of an exact stability analysis of an unbounded incompressible flow having constant stratification and constant shear.3 pages, no figures. Uses aa.clsAstrophysicstext