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September 19th, 2007, 04:26 AM  #1 
Newbie Joined: Sep 2007 Posts: 3 Thanks: 0  Idempotents in semisimple rings
Let R be a semisimple ring and e,f \in R idempotents. Is it true that Re <= Rf implies eR <= fR? Here Re, Rf, eR, fR denotes the left/right ideals generated by e/f. thx /d 

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idempotents, rings, semisimple 
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