Geodesic
Characterizing semigroups with commutative superextensions
Algebra and discrete mathematics, Tome 17 (2014) no. 2, pp. 161-192

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We characterize semigroups $X$ whose semigroups of filters $\varphi(X)$, maximal linked systems $\lambda(X)$, linked upfamilies $N_2(X)$, and upfamilies $\upsilon(X)$ are commutative.
Keywords: Commutative semigroup, superextension, semigroup of filters, semigroup of linked upfamilies. 
@article{ADM_2014_17_2_a1,
     author = {Taras Banakh and Volodymyr Gavrylkiv},
     title = {Characterizing semigroups with commutative superextensions},
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     volume = {17},
     number = {2},
     year = {2014},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2014_17_2_a1/}
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Taras Banakh; Volodymyr Gavrylkiv. Characterizing semigroups with commutative superextensions. Algebra and discrete mathematics, Tome 17 (2014) no. 2, pp. 161-192. http://geodesic.mathdoc.fr/item/ADM_2014_17_2_a1/