2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/170485We use the Gowers block Ramsey theorem to characterize Banach spaces containing isomorphs of $\ell_p$ (for some $1 \leq p < \infty$) or $c_0$.Functional Analysis46B20; 46B40; 46B03On Banach Spaces containing $l_p$ or $c_0$text