2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/11277In this work we discuss on the basis of the instantaneous recycling approximation the possibility of determining a relation between matter distribution (luminous and dark) in elliptical galaxies and the observed metallicity gradients. A particular case is developed in detail yielding an analitycal expression of the above relation.4 pages, uses l-aa.styAstrophysicstext