50168384

j

50168384 Mildenberger, Heike Shelah, Saharon The minimal cofinality of an ultrapower of $\omega $ and the cofinality of the symmetric groupcan be larger than ^{+} J. Symb. Log. 76, No. 4, 1322-1340 (2011). 2011 EN

http://projecteuclid.org/euclid.jsl/1318338852