Abstract
All commutative nilsemigroups are constructed from congruences on free commutative semigroups.
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Grillet, P.A. A construction of commutative nilsemigroups. Periodica Mathematica Hungarica 44, 27–44 (2002). https://doi.org/10.1023/A:1014967701458
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DOI: https://doi.org/10.1023/A:1014967701458