Publicado 2006-03-15
Palabras clave
- strong cs-network,
- weakly hereditarily closure-preserving family,
- sequential space,
- \(\aleph_0\) - spaces
Derechos de autor 2025 Scientia
Esta obra está bajo una licencia internacional Creative Commons Atribución-NoComercial 4.0.
Cómo citar
A note on \(\aleph_0\) - spaces. (2006). Scientia, 12, 1-4. https://revistas.usm.cl/scientia/article/view/75
Resumen
In this paper, we prove that a space is an \(\aleph_0\)- space if it is an \(\aleph_1\)-compact space with a \(\sigma\)-weakly hereditarily closure-preserving strong \(cs\)-network. As an application of this result, we prove that a space with a nontrivial convergent sequence is an \(\aleph_0\)-space if it has a \(\sigma\)-weakly hereditarily closure-preserving strong \(cs\)-network.
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