2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/60349We give a new and simpler proof of a result of Hopkins and Gross relating Brown-Comenetz duality to Spanier-Whitehead duality in the K(n)-local stable homotopy category.Algebraic Topology55N20; 55P42; 20E18text