2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/59479We answer a question of Yasui. Morever, we show that if a Tychonoff space Y is countably 1-paracompact in every Tychonoff space X that contains Y as a closed subspace then Y is linearly Lindelof.General Topologytext