I have been thinking about this for a week and I simply can't get anywhere.(adsbygoogle = window.adsbygoogle || []).push({});

consider a 4x4 diagonal matrix such that if a11 > a22 > a33 > a44, (0's everywhere else)

then it is similar to another matrix with the same diagonal but 0's in upper triangular part an any numbers in the lower triangular part.

These seem to be similar regardless of whether a11 > a22 > a33 > a44

help!

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# Help! Diagonal matrix similar to upper triangular matrix?

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