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On the joins of semigroup varieties with the variety of commutative semigroups

Authors: M. V. Sapir and M. V. Volkov
Journal: Proc. Amer. Math. Soc. 120 (1994), 345-348
MSC: Primary 20M07
MathSciNet review: 1185274
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Abstract: We show that the join of a variety of semigroups and the variety of all commutative semigroups is not finitely based, provided some weak conditions.

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