The Rudin-Blass ordering of ultrafilters

Journal of Symbolic Logic

Volumn 63, Issue 2, 1998, Pages 584-592

  Laflamme, Claude ^a   Zhu, Jian Ping ^b  

^a UNIVERSITY OF CALGARY   (Canada)

^b Versus Technologies Inc   (Canada)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0032222039     PISSN: 00224812     EISSN: None     Source Type: Journal    
DOI: 10.2307/2586852     Document Type: Article

References (12)

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2. _, Near coherence of filters I: cofinal equivalence of models of arithmetic, Notre Dame Journal of Formal Logic, vol. 27 (1986), pp. 579-581.
3. _, Near coherence of filters II: the Stone-Cech remainder of half-line, Transactions of the American Mathematical Society, vol. 300 (1987), pp. 557-581.
4. א2, points and the Rudin-Keisler ordering may be downward directed, Annals of Pure and Applied Logic, vol. 33 (1987), pp. 213-243.
5. M. CANJAR, Cofinalities of countable ultraproducts: the existence theorem, Notre Dame Journal of Formal Logic, vol. 30 (1989), pp. 539-542.
6. W. COMFORT and S. NEGREPONTIS, The theory of ultrafilters, Springer-Verlag, Berlin, 1974.
7. A. DOW, βN, Annals of the New York Academy of Sciences (1993), pp. 46-66.
8. A. DOW and J.-P. ZHU, in preparation.
9. K. P. HART, The Cech-Stone compactification of the real line, Recent progress in general topology (M. Husek and van Mill, editors), North-Holland, Amsterdam, 1992.
10. C. LAFLAMME, Forcing with filters and complete combinatorics, Annals of Pure and Applied Logic, vol. 42 (1989), pp. 125-163.
11. J. VAN MILL, Introduction to βω Handbook of set-theoretic topology (K. Kunen and J. E. Vaughan, editors), North-Holland, Amsterdam, 1988.
12. J.-P. ZHU, Continua in ℝ* , Topology and its Applications, vol. 50 (1993), pp. 183-197.