2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/153112Characterizations are given for 1-complemented hyperplanes of strictly monotone real Lorentz spaces and 1-complemented finite codimensional subspaces (which contain at least one basis element) of real Orlicz spaces equipped with either Luxemburg or Orlicz norm.Functional Analysis46B45text