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Fundamentalnaya i Prikladnaya Matematika, 2008, Volume 14, Issue 7, Pages 43–51
(Mi fpm1172)
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This article is cited in 8 scientific papers (total in 8 papers)
Upper-modular elements of the lattice of semigroup varieties. II
B. M. Vernikov Ural State University
Abstract:
A semigroup variety is called a variety of degree $\le2$ if all its nilsemigroups are semigroups with zero multiplication, and a variety of degree $>2$ otherwise. We completely determine all semigroup varieties of degree $>2$ that are upper-modular elements of the lattice of all semigroup varieties and find quite a strong necessary condition for semigroup varieties of degree $\le2$ to have the same property.
Citation:
B. M. Vernikov, “Upper-modular elements of the lattice of semigroup varieties. II”, Fundam. Prikl. Mat., 14:7 (2008), 43–51; J. Math. Sci., 164:2 (2010), 182–187
Linking options:
https://www.mathnet.ru/eng/fpm1172 https://www.mathnet.ru/eng/fpm/v14/i7/p43
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