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On right unipotent semigroups II
Published online by Cambridge University Press: 18 May 2009
Extract
We describe two congruences α and γ contained in ℒ on an arbitrary orthodox semigroup. Let S be a right unipotent semigroup. We show that (i) α is an inverse semigroup congruence and γ is the finest fundamental inverse semigroup congruence on S, (ii) S is a union of groups if and only if ℒ on S and (iii) S is a band of groups if and only if ℒ on S.
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- Copyright © Glasgow Mathematical Journal Trust 1978
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