2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64013We characterize norm one complemented subspaces of Orlicz sequence spaces $\ell_M$ equipped with either Luxemburg or Orlicz norm, provided that the Orlicz function $M$ is sufficiently smooth and sufficiently different from the square function. This paper concentrates on the more difficult real case, the complex case follows from previously known results.14 pagesFunctional Analysis46B20,46B45,46B04text