Any O-simple dual semigroup is completely O-simple.
Schwarz, S.
Semigroup forum, Tome 2 (1971), p. 90-92 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1971-01-01
EUDML-ID : urn:eudml:doc:133818 
@article{GDZPPN001247484,
     title = {Any O-simple dual semigroup is completely O-simple.},
     journal = {Semigroup forum},
     volume = {2},
     year = {1971},
     pages = {90-92},
     zbl = {0232.20117},
     url = {http://dml.mathdoc.fr/item/GDZPPN001247484}
}

Schwarz, S. Any O-simple dual semigroup is completely O-simple.. Semigroup forum, Tome 2 (1971) pp. 90-92. http://gdmltest.u-ga.fr/item/GDZPPN001247484/