Artículos de revistas
WHICH TOPOLOGIES HAVE IMMEDIATE PREDECESSORS IN THE POSET OF HAUSDORFF TOPOLOGIES?
Fecha
2009Registro en:
HOUSTON JOURNAL OF MATHEMATICS, v.35, n.1, p.149-158, 2009
0362-1588
Autor
ALAS, Ofelia T.
TKACHENKO, Mikhail G.
WILSON, Richard G.
Institución
Resumen
We study which topology have an immediate predecessor in the poset of Sigma(2) of Hausdorff topologies on set X. We show that certain classes of H-closed topologies, do have predecessors. and we give examples of second countable H-closed topologies which are not upper Sigma(2.)
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