2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87177The variational principle for linear stability of three-dimensional, inhomogenious, compressible, moving magnetized plasma is suggested. The principle is ``softer'' (easier to be satisfied) than all previously known variational stability conditions. The key point of the analysis is a conservation in variations of new integrals inherent in the linearized equation of the motion that was not earlier discussed in the literature.Submitted to PRLPlasma PhysicsFluid Dynamicstext