Geodesic
Free groups and semigroups in ßN.
Semigroup forum, Tome 30 (1984), pp. 177-194.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Mots-clés : Stone-Čech compactification, non-commutative, free group, minimal right ideals 
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     author = {N. Hindman and J. Pym},
     title = {Free groups and semigroups in  {{\ss}N.}},
     journal = {Semigroup forum},
     pages = {177--194},
     publisher = {mathdoc},
     volume = {30},
     year = {1984},
     zbl = {0536.22005},
     url = {http://geodesic.mathdoc.fr/item/SF_1984__30_134714/}
}
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N. Hindman; J. Pym. Free groups and semigroups in  ßN.. Semigroup forum, Tome 30 (1984), pp. 177-194. http://geodesic.mathdoc.fr/item/SF_1984__30_134714/