2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71615In this article we investigate the Fourier series and transforms for the functions defined on the $ [0, 2 π]^ d $ or $ R^d $ and belonging to the exponential Orlicz and some other rearrangement invariant (r.i.) spaces.18 pages, no figuresFunctional AnalysisProbabilitytext