Refining Families for Ultrafilters.
Hindman, Neil ; Comfort, W.W.
Mathematische Zeitschrift, Tome 147 (1976), p. 189-200 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1976-01-01
EUDML-ID : urn:eudml:doc:172391 
@article{GDZPPN002417766,
     title = {Refining Families for Ultrafilters.},
     journal = {Mathematische Zeitschrift},
     volume = {147},
     year = {1976},
     pages = {189-200},
     zbl = {0314.54039},
     url = {http://dml.mathdoc.fr/item/GDZPPN002417766}
}

Hindman, Neil; Comfort, W.W. Refining Families for Ultrafilters.. Mathematische Zeitschrift, Tome 147 (1976) pp. 189-200. http://gdmltest.u-ga.fr/item/GDZPPN002417766/