*[Oops, this was a typo: all references to eigenvalues here have been replaced with singular values. There is no interlacing for eigenvalues for non-Hermitian matrices, as these eigenvalues need not even be real. -T.]*

A + B are increasing ordered, but the eigenvalues of B are not ordered, is it possible to use Weyl’s inequality to get a bound for the eigenvalue of A + B? Thank you for your attention. ]]>

Any complex vector space can be viewed as a real vector space of twice the dimension, so one can take the gradient in that setting.

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