Given a psd matrix $H=[A, B; B^\top, C]$. I can find bounds for singular values and the norm for $A, B, C$. How can I construct a bound for the condition number of $H$? I have tried using interlacing theorem but it doesn't work.
2026-03-13 09:09:29.1773392969
How to approximate the condition number of a matrix using its component
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