2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/160207We prove that an averaging principle holds for a general class of stochastic reaction-diffusion systems, having unbounded multiplicative noise, in any space dimension. We show that the classical Khasminskii approach for systems with a finite number of degrees of freedom can be extended to infinite dimensional systems.Probability60H15, 70K65, 37L40text