Report copyright - (3-WTRL-PM); Radjavi,H. C -semigroups. (Englishsummary) J ...MR2327578 (2008e:47098) 47D03 (15A30 47A16) Livshits,Leo (1-COLBY); MacDonald,Gordon [MacDonald,GordonWilson] (3-PRIN);
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