stabilize eig(h) tests #122
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kshyatt
reviewed
Dec 19, 2025
kshyatt
reviewed
Dec 19, 2025
kshyatt
reviewed
Dec 19, 2025
kshyatt
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Dec 19, 2025
kshyatt
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Dec 19, 2025
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LGTM, just left some nitpicky comments
kshyatt
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Dec 19, 2025
| function stabilize_eigvals!(D::AbstractVector) | ||
| absD = abs.(D) | ||
| p = invperm(sortperm(absD)) # rank of abs(D) | ||
| # account for exact degeneracies in absolute value when having complex conjugate pairs |
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Great! This will help us a lot if we have to revisit in 6 months, I think.
lkdvos
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Dec 19, 2025
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This tries to remove all (near) degeneracies in matrices that we will use for the AD of the eigenvalue decomposition, thereby hopefully stabilizing the tests.
I also made some progress with the case of degeneracies, for which I will make a separate PR with some hand written tests.