A Structural Theorems for (m; n)-quasi-ideal Semigroups

Petar Protic

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The definition of (m; n)-ideal and (m; n)-quasi-ideal on emigroup is given in [3]. They have been studied in many papers, recently in papers [4], [5] and [6]. In this paper we introduce the notion of (m; n)-quasi-ideal semigroup and consider some general properties of this class of semigroups.
Also, we introduce the notion of an (m; n)-duo quasi-ideal semigroup and give their a structural description.

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