A Characterization of 2-Square Ultrafilters
Rosen, Ned I.
J. Symbolic Logic, Tome 48 (1983) no. 1, p. 409-414 / Harvested from Project Euclid
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The class of 2-square ultrafilters on $\omega$ equals the union, for $n \geq 1$, of the classes of strictly $n$ Ramsey ultrafilters on $\omega$.
Publié le : 1983-06-14
Classification:  
@article{1183741257,
     author = {Rosen, Ned I.},
     title = {A Characterization of 2-Square Ultrafilters},
     journal = {J. Symbolic Logic},
     volume = {48},
     number = {1},
     year = {1983},
     pages = { 409-414},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1183741257}
}

Rosen, Ned I. A Characterization of 2-Square Ultrafilters. J. Symbolic Logic, Tome 48 (1983) no. 1, pp.  409-414. http://gdmltest.u-ga.fr/item/1183741257/