2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71149Let L be a countable and locally finite CW complex. Suppose that the class of all metrizable compacta of extension dimension not greater than L contains a universal element which is an absolute extensor in dimension L. Our main result shows that L is quasi-finite.Geometric TopologyGeneral Topologytext