Strongly summable ultrafilters on N and small maximal subgroups of ßN.
Hindman, N.
Semigroup forum, Tome 43 (1991), p. 63-76 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1991-01-01
EUDML-ID : urn:eudml:doc:135065 
@article{GDZPPN001260782,
     title = {Strongly summable ultrafilters on N and small maximal subgroups of \ss N.},
     journal = {Semigroup forum},
     volume = {43},
     year = {1991},
     pages = {63-76},
     zbl = {0716.22002},
     url = {http://dml.mathdoc.fr/item/GDZPPN001260782}
}

Hindman, N. Strongly summable ultrafilters on N and small maximal subgroups of ßN.. Semigroup forum, Tome 43 (1991) pp. 63-76. http://gdmltest.u-ga.fr/item/GDZPPN001260782/