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Displaying similar documents to “A note on certain semigroups of algebraic numbers”

Some commutativity criteria. - II

John C. Lennox, A. Mohammadi Hassanabadi, James Wiegold (1991)

Rendiconti del Seminario Matematico della Università di Padova

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On left --liberal semigroups

Yong He, Fang Shao, Shi-qun Li, Wei Gao (2006)

Czechoslovak Mathematical Journal

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In this paper the equivalence on a semigroup in terms of a set of idempotents in is defined. A semigroup is called a -liberal semigroup with as the set of projections and denoted by if every -class in it contains an element in . A class of -liberal semigroups is characterized and some special cases are considered.