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|Title||Quasi-Ideals and BI-Ideals on Semigroups and Semirings|
In this thesis, we introduce some concepts of semigroups and semirings, as quasi-ideals, bi-ideals, regular elements and regular semigroups and semirings Also, we shall introduce some semigroups whose sets of bi-ideals and quasiideals coincide. It has been shown that each quasi-ideal on a semigroup or a semiring is a bi-ideal, but the converse is not true. We close this thesis by flnding semigroups contain bi-ideals which are not quasi-ideals.
|Publisher||the islamic university|
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