Geodesic
On $x$-operators in an arbitrary semigroup
Archivum mathematicum, Tome 21 (1985) no. 1, pp. 13-22

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Classification : 06A15, 20M12
Keywords: general closure operator; closure operator; modification of a closure operator; semigroup; left (right) partial x-operator in a semigroup; partial x-operator in a semigroup; x-extension (left, right) of a partial x-operator (left, right) 
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     author = {Pilecka-Oborska, Barbara and Serafin, Stanis{\l}aw},
     title = {On $x$-operators in an arbitrary semigroup},
     journal = {Archivum mathematicum},
     pages = {13--22},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1985},
     mrnumber = {818303},
     zbl = {0581.20061},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1985__21_1_a2/}
}
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Pilecka-Oborska, Barbara; Serafin, Stanisław. On $x$-operators in an arbitrary semigroup. Archivum mathematicum, Tome 21 (1985) no. 1, pp. 13-22. http://geodesic.mathdoc.fr/item/ARM_1985__21_1_a2/