How to calculate entropy using the eigenvalues when the eigenvalues are negative?
Is there a simple relation between the entropy of a matrix and its characteristic polynomial?
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$\begingroup$ How do you define it? $\endgroup$– Chris GodsilCommented Jan 28, 2013 at 12:41
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$\begingroup$ the eigenvaluesof the matrix $H$ have to be real, positive and sum to unity, otherwise the entropy makes no sense. $\endgroup$– Carlo BeenakkerCommented Jan 29, 2013 at 8:30
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