2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/163151Given a compact set $S$ and a uniformly discrete sequence $\La$, we show that "approximate interpolation" of delta--functions on $\La$ by a bounded sequence of $L^2-$functions with spectra in $S$ implies an estimate on measure of $S$ through the density of $\La$.10 pagesClassical Analysis and ODEs42C99text