Prime ideals of the cartesian product of two semigroups
Mario Petrich (1962)
Czechoslovak Mathematical Journal
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Mario Petrich (1962)
Czechoslovak Mathematical Journal
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Motupalli Satyanarayana (1971)
Czechoslovak Mathematical Journal
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Motupalli Satyanarayana (1978)
Czechoslovak Mathematical Journal
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Jaroslav Ježek, Tomáš Kepka, Petr Němec (2008)
Mathematica Bohemica
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Every commutative nil-semigroup of index 2 can be imbedded into such a semigroup without irreducible elements.