Title of article :
Two real ultrafilters on ω
Author/Authors :
Dow، نويسنده , , Alan and Zhou، نويسنده , , Jinyuan، نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 1999
Abstract :
We prove the following results concerning the space ω∪{p}, where p is an ultrafilter on ω:
ere are ultrafilters p on ω with the property that every compactification of ω∪{p} contains a copy of βω.
here is an ultrafilter p on ω with a strong Noetherian base, i.e., every member of the base is contained, mod finite, in only finitely many others.
Keywords :
?? , Noetherian base , Almost disjoint refinement , embedding , Compactification
Journal title :
Topology and its Applications
Journal title :
Topology and its Applications