2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65993Motivated by the study of the local extrema of sin(x)/x we define the \emph{Amplitude Modulation} transform of functions defined on (subsets of) the real line. We discuss certain properties of this transform and invert it in some easy cases.Classical Analysis and ODEs26A09; 14Q99text