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A characterization of semilattices of left or right groups. (English) Zbl 0247.20073


MSC:

20M10 General structure theory for semigroups
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References:

[1] B. Pondělíček: On a certain relation for closure operations on a semigroup. Czechoslovak Math. J. 20 (95), (1970), 220-231. · Zbl 0198.34304
[2] B. Pondělíček: A certain equivalence on a semigroup. Czechoslovak Math. J. 21 (96), (1971), 109-117. · Zbl 0217.36404
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