Joint papers of Blass and Shelah

Blass+Shelah, There may be simple $P_ {\aleph_ 1}$- and $P_ {\aleph_ 2}$-points and the Rudin-Keisler ordering may be downward directed -- Annals Pure and Applied Logic 33 (1987) 213-243
Blass+Shelah, Ultrafilters with small generating sets -- Israel J Math 65 (1989) 259-271
Blass+Shelah, Near coherence of filters. III. A simplified consistency proof -- Notre Dame J Formal Logic 30 (1989) 530-538
BGSh:533 2000-10-27 [pdf] [ps] [abstract] [arXiv:math.LO/9705225]
Blass+Gurevich+Shelah, Choiceless Polynomial Time -- Annals Pure and Applied Logic 100 (1999) 141-187
BGSh:760 2001-02-06 [pdf] [ps] [abstract] [arXiv:math.LO/0102059]
Blass+Gurevich+Shelah, On polynomial time computation over unordered structures -- J Symbolic Logic 67 (2002) 1093-1125
BsSh:854 2004-10-25 [pdf] [ps] [abstract] [arXiv:math.LO/0504199]
Blass+Shelah, Ultrafilters and partial products of infinite cyclic groups -- Communications in Algebra 33 (2005) 1997-2007
BsSh:870 2005-09-02 [pdf] [ps] [abstract] [arXiv:math/0509406]
Blass+Shelah, Disjoint Non-Free Subgoups of Abelian Groups -- Quaderni di Matematica 17 (2006) 1-24
BsSh:910 2008-04-29 [pdf] [ps] [abstract] [arXiv:0711.3031]
Blass+Shelah, Basic Subgroups and Freeness, a counterexample -- Models, Modules and Abelian Groups, in Memory A.L.S. Corner (2008) 63--73

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