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Dec 9 at 19:53 history edited Carlo Beenakker CC BY-SA 4.0
copied image to MO repository, now that the answer has been reactivated
May 25, 2020 at 13:06 comment added Ben McKay That only takes care of the positive definite case. I think the real issue that the question raises is about allowing zero eigenvalues.
May 25, 2020 at 10:33 vote accept ABIM
May 25, 2020 at 11:42
May 25, 2020 at 9:45 history answered Carlo Beenakker CC BY-SA 4.0