Notas de Matemática - N° 169 1997 http://www.saber.ula.ve/handle/123456789/4698 2026-05-01T02:51:10Z 2026-05-01T02:51:10Z Notas de Matemática http://www.saber.ula.ve/handle/123456789/22654 2018-03-14T07:47:51Z 2008-07-31T09:00:00Z Notas de Matemática 2008-07-31T09:00:00Z On borel topologies over countable sets. Uzcátegui Aylwin, Carlos Enrique http://www.saber.ula.ve/handle/123456789/22653 2018-03-14T07:47:50Z 2006-05-31T09:00:00Z On borel topologies over countable sets. Uzcátegui Aylwin, Carlos Enrique 2006-05-31T09:00:00Z