http://www.saber.ula.ve/handle/123456789/4731 2003 Tue, 09 Jun 2026 13:49:07 GMT 2026-06-09T13:49:07Z http://www.saber.ula.ve/handle/123456789/22720 Weak open sets: a presentation using operators. Colasante Martínez, María Luisa Tue, 13 Jun 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22720 2006-06-13T09:00:00Z http://www.saber.ula.ve/handle/123456789/22719 Notas de Matemática Tue, 13 Jun 2006 09:00:00 GMT http://www.saber.ula.ve/handle/123456789/22719 2006-06-13T09:00:00Z