The Minimum group congruence on an ...-unipotent semi group.
C.C. Edwards (1979)
Semigroup forum
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C.C. Edwards (1979)
Semigroup forum
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M.E. Adams, M. Gould, S.T. Tschantz (1991)
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Krgović, Dragica N. (1993)
Publications de l'Institut Mathématique. Nouvelle Série
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Francis J. Pastijn, Xian Zhong Zhao (2000)
Archivum Mathematicum
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The idempotent semirings for which Green’s -relation on the multiplicative reduct is a congruence relation form a subvariety of the variety of all idempotent semirings. This variety contains the variety consisting of all the idempotent semirings which do not contain a two-element monobisemilattice as a subsemiring. Various characterizations will be given for the idempotent semirings for which the -relation on the multiplicative reduct is the least lattice congruence.
Francis E. Masat (1981)
Czechoslovak Mathematical Journal
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G.R. Baird, G. Thierrin (1972)
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C.C. Edwards (1977)
Semigroup forum
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