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Does Every Right Ideal of a Matrix Ring Contain a Nilpotent Element? G. F. Birkenmeier and R. P. Tucci The American Mathematical Monthly , pp. 631-633 (3 pages) ...
The main purpose of this note is to prove that any basis of a nilpotent Lie algebra for which all diagonal left-invariant metrics have diagonal Ricci tensor necessarily produce quite a simple set of ...
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