Cancellable elements of the lattice of semigroup varieties

Published 9 Mar 2017 in math.GR | (1703.03209v5)

Abstract: We completely determine all commutative semigroup varieties that are cancellable elements of the lattice SEM of all semigroup varieties. In particular, we prove that, for commutative varieties, the properties of being cancellable and modular elements of SEM are equivalent.

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