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Semigroups all but one of whose proper subsemigroups are groups

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References

  1. Clifford, A.H. and G.B. Preston,The Algebraic Theory of Semigroups, Mathematical Surveys, No. 7, Vol. I, Amer. Math. Soc., Providence, 1961.

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  2. Pollák, G. and L. Rédei,Die Halbgruppen deren alle echten Teilhalbgruppen Gruppen sind, Publ. Math. Debrecen 6 (1959), 126–130.

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  3. Schwarz, Š.,Semigroups in which every proper subideal is a group, Acta Sci. Math. Szeged 21 (1960), 125–131.

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Gard, J. Semigroups all but one of whose proper subsemigroups are groups. Semigroup Forum 10, 215–219 (1975). https://doi.org/10.1007/BF02194888

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  • DOI: https://doi.org/10.1007/BF02194888

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