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| | The Ring of Endomorphisms (Site not responding. Last check: 2007-10-13) |
 | | Given two rings r and s, m is an rs bimodule if m is a left r module and a right s module, and (r*m)*s = r*(m*s). |
 | | An example of a bimodule is any r module m, where s is the ring of r endomorphisms of m, written on the right. |
 | | Conversely, a bimodule m is an r module, and if f is an element of s, it rearranges the elements of m; a function from m into itself. |
| www.mathreference.com /mod,rend.html (517 words) |
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