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Results tagged with eigenvalues
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user 160144
eigenvalues of matrices or operators
2
votes
Is there a fast way to check if a matrix has any small eigenvalues?
The determinant is the product of the eigenvalues and it is easy to see that a product of real numbers can only be in the interval $(-1,1)$ if at least one of the numbers is also in $(-1,1)$. …
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