Sums of idempotents in ßN.
Berglund, J.F. ; Hindman, N.
Semigroup forum, Tome 44 (1992), p. 107-111 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1992-01-01
EUDML-ID : urn:eudml:doc:135133 
@article{GDZPPN001261479,
     title = {Sums of idempotents   in \ss N.},
     journal = {Semigroup forum},
     volume = {44},
     year = {1992},
     pages = {107-111},
     zbl = {0759.22004},
     url = {http://dml.mathdoc.fr/item/GDZPPN001261479}
}

Berglund, J.F.; Hindman, N. Sums of idempotents   in ßN.. Semigroup forum, Tome 44 (1992) pp. 107-111. http://gdmltest.u-ga.fr/item/GDZPPN001261479/