2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/4554The general relativistic mass-energy variation formula for axisymmetric equilibrium states of a selfgravitating system is developed in the particular case for which the relevant matter consists of a perfectly conducting multiconstituent fluid (or superfluid) with stationary circular or convective motion.11 pages, Tex version of manuscript originally distributed with restricted circulation in Journees Relativistes, 1979, ed. I. Moret-Bailly, C. Latremoliere, pp 166-182 (Faculte des Sciences, Angers, 1979)Astrophysicstext