A note on quasi and bi-duals in ternary semigroups
The authors prove that in ternary semigroups, quasi-ideals are bi-ideals but not conversely, where quasi-ideals are sets \(Q\) containing the intersection of \(QTT\), \(TQT\), \(TTQ\) and the intersection of \(QTT\), \(TTQTT\), \(TTQ\) for ternary semigroup \(T\), and biideals are sets \(B\) containing \(BTBTB\).
scientific article; zbMATH DE number 785306