On p-Semigroups
Mathematica Moravica, Tome 4 (2000) no. 1.

Voir la notice de l'article dans eLibrary of Mathematical Institute of the Serbian Academy of Sciences and Arts

Generalizing the notion of anti-inverse semigroup, we introduce the notion of $p$-semigroup, for arbitrary $p\in N$. We prove that every $p$-semigroup is covered by groups, classes of which are completely described.
Mots-clés : semigroup, union of groups, p-semigroups 
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Vjekoslav Budimirović. On p-Semigroups. Mathematica Moravica, Tome 4 (2000) no. 1. https://geodesic-test.mathdoc.fr/item/MM3_2000_4_1_a1/