2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/79335It is shown that the Schreier space X admits a set of continuum cardinality whose elements are mutually incomparable complemented subspaces spanned by subsequences of the natural Schauder basis of X.26 pages, AMS-LaTeXFunctional Analysis46B03text