The varieties of n-testable semigroups.
A.N. Trahtman (1983)
Semigroup forum
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Displaying similar documents to “Generalized varieties of commutative and nilpotent semigroups.”
The varieties of n-testable semigroups.
M-Solid Subvarieties of some Varieties of Commutative Semigroups
Koppitz, J. (1997)
Serdica Mathematical Journal
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∗ The research of the author was supported by the Alexander v. Humboldt-Stiftung. The basic concepts are M -hyperidentities, where M is a monoid of hypersubstitutions. The set of all M -solid varieties of semigroups forms a complete sublattice of the lattice of all varieties of semigroups. We fix some specific varieties V of commutative semigroups and study the set of all M -solid subvarieties of V , in particular, if V is nilpotent.
On the nilpotent elements of semigroups
C. S. Hoo, K. P. Shum (1972)
Colloquium Mathematicae
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Some pseudovariety joins involving the pseudovariety of finite groups.
Jorge Almeida (1988)
Semigroup forum
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On spectra of solvability and attainability for varieties of semigroups.
L.M. Martynov (1989)
Semigroup forum
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A sketch of the lattice of commutative nilpotent semigroup varieties.
I.O. Korjakov (1982)
Semigroup forum
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Semidirectly closed pseudovarieties of locally trivial semigroups.
J. Almeida (1990)
Semigroup forum
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Epimorphisms, dominions and varieties of semigroups.
N.M. Khan (1982)
Semigroup forum
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Hyperassociative varieties of semigroups.
K. Denecke, J. Koppitz (1994)
Semigroup forum
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Some embedding theorems in varieties of semigroups.
A.N. Petrov (1983)
Semigroup forum
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Pre-strongly solid varieties of commutative semigroups
Sarawut Phuapong, Sorasak Leeratanavalee (2011)
Discussiones Mathematicae - General Algebra and Applications
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Generalized hypersubstitutions are mappings from the set of all fundamental operations into the set of all terms of the same language do not necessarily preserve the arities. Strong hyperidentities are identities which are closed under the generalized hypersubstitutions and a strongly solid variety is a variety which every its identity is a strong hyperidentity. In this paper we give an example of pre-strongly solid varieties of commutative semigroups and determine the least and the...