Regular elements in sandwich semigroups of binary relations |
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Authors: | Melvin C. Thornton |
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Affiliation: | Department of Mathematics and Statistics, University of Nebraska, Lincoln, NE 68588, USA |
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Abstract: | This note gives a counterexample to a published characterization of regular elements in sandwich semigroups of binary relations. The method of that paper is used to characterize those elements having a right identity. A characterization of regular elements is obtained following the approach of Schein. |
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