2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103825We prove a $Z$-set unknotting theorem for Nobeling spaces. This generalizes a result obtained by S. Ageev for a restricted class of $Z$-sets. The theorem is proved for a certain model of Nobeling spaces.28 pagesGeometric TopologyGeneral Topology54F45; 55M10text