Quasi-abelian and quasi-solvable regular semigroups

In this note quasi-abelian semigroups are studied and it is proved that they form an e-variety of orthodox semigroups. More, quasi-abelian regular Bruck-Reilly monoids are characterized as extensions of monoids which are (reverse) semidirect products of a group and a semilattice. At last, quasi-abel...

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Bibliographic Details
Main Author: Brunetto Piochi
Format: Article
Language:English
Published: Università degli Studi di Catania 1996-12-01
Series:Le Matematiche
Online Access:http://www.dmi.unict.it/ojs/index.php/lematematiche/article/view/468