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OpenStudy (loser66):
Prove or disprove that there are no complex 3 x3 matrices X and Y such that \[XY-YX=\left[\begin{matrix}1&0&0\\0&-2&0\\0&0&3\end{matrix}\right]\] Please, help.
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Miracrown (miracrown):
ha ha, I told you didn't I? :P I'm pleased that you managed to solve it.
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