Dear David, Le vendredi 09 juin 2023 à 10:16 +0000, David Houseman a écrit : > Package: liblapacke > Version: 3.9.0-3 > Severity: important > X-Debbugs-Cc: da...@grey-house.net > > Given a symmetric matrix, LAPACKE dsyev() should return in place the matrix > of eigenvectors > (when JOBZ = 'V'). The eigenvector matrix is not symmetric (it is > orthogonal). However, > it appears that dsyev() only returns the upper/lower triangle of the > eigenvector matrix, > which is not enough to easily construct the full eigenvector matrix.
[…] > This is a fairly critical problem that would silently lead > to quite wrong answers for certain mathematical techniques > possibly including symmetric matrix inversion and/or > multilinear regression. I think it would be better to have > it fixed but I have no idea how difficult it would be to > patch debian stable. I will try the new debian testing and > see whether it is also affected. Thanks for your report. I confirm that the bug is present in Debian “Bullseye” 11, and that it is fixed in the recently Debian “Bookworm” 12. I am going to fix it in bullseye (see #1038943 for the details). Cheers, -- ⢀⣴⠾⠻⢶⣦⠀ Sébastien Villemot ⣾⠁⢠⠒⠀⣿⡁ Debian Developer ⢿⡄⠘⠷⠚⠋⠀ https://sebastien.villemot.name ⠈⠳⣄⠀⠀⠀⠀ https://www.debian.org
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