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It seems that nalgebra::SymmetricEigen doesn't sort eigenvectors properly in the ascending order of eigenvalues, while nalgebra_lapack::SymmetricEigen does this correctly.
This example code produces different order of eigenvalues in nalgebra and nalgebra_lapack:
nalgebra: two first values are not in correct ascending order!
It seems that
nalgebra::SymmetricEigen
doesn't sort eigenvectors properly in the ascending order of eigenvalues, whilenalgebra_lapack::SymmetricEigen
does this correctly.This example code produces different order of eigenvalues in
nalgebra
andnalgebra_lapack
:nalgebra: two first values are not in correct ascending order!
nalgebra_lapack: correct sorting
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