Crowded rational ultrafilters

Topology and its Applications

Volumn 97, Issue 1-2, 1999, Pages 79-84

  Coplakova, Eva ^a   Hart, Klaas Pieter ^a  

^a DELFT UNIVERSITY OF TECHNOLOGY   (Netherlands)

Author keywords

Bounding number; Gruff; Rational numbers; Ultrafilter

Indexed keywords

EID: 0345457061     PISSN: 0016660X     EISSN: None     Source Type: Journal    
DOI: 10.1016/s0166-8641(98)00069-8     Document Type: Article

References (2)

1. K.P. Hart and J. van Mill, Open problems on βω, in: J. van Mill and G.M. Reed, eds., Open Problems in Topology (North-Holland, Amsterdam, 1990) pp. 97-125.
2. E.K. van Douwen, Better closed ultrafilters on ℚ, Topology Appl. 47 (1992) 173-177.