2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/147654Conditions for a function (number sequence) to be a multiplier on the space of integrable functions on $\Bbb R$ ($\Bbb T$) are given. This generalizes recent results of Giang and Moricz.7 pages, AMSTEX, no figuresFunctional Analysistext