2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/35735The non-minimal coupling of gravity to a scalar field can be transformed into a minimal coupling through a conformal transformation. We show how to connect the results of a perturbation calculation, performed around a Friedmann-Robertson-Walker background solution, before and after the conformal transformation. We work in the synchronous gauge, but we discuss the implications of employing other formalisms.Latex, 14 pagesGeneral Relativity and Quantum Cosmologytext