On dominions and varieties of bands
Shabnam Abbas, Wajih Ashraf, Aftab Hussain Shah · Asian-European Journal of Mathematics · 2020
We have shown that a variety of left(right) normal bands is closed in some homotypical varieties. Further, we partially generalize a result of Isbell from the class of commutative semigroups to some generalized classes of commutative semigroups by showing that dominion of such semigroups belongs to same classes.