On dominions and varieties of bands
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.
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1970 ◽
Vol s2-2
(1)
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pp. 80-82
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1971 ◽
Vol 36
(1)
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pp. 99-101
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1972 ◽
Vol 41
(2)
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pp. 355-364
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1993 ◽
Vol 16
(2)
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pp. 385-398
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