Summary: | Eigenvalue calculation does not converge on all-zeros matrix | ||
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Product: | Eigen | Reporter: | Joris Mooij <j.mooij> |
Component: | Eigenvalues | Assignee: | Nobody <eigen.nobody> |
Status: | RESOLVED FIXED | ||
Severity: | Unknown | CC: | colinbrownec, gael.guennebaud, jacob.benoit.1, jitseniesen |
Priority: | Normal | ||
Version: | 3.3 (current stable) | ||
Hardware: | All | ||
OS: | All | ||
Whiteboard: |
Description
Joris Mooij
2012-06-19 15:34:06 UTC
Thanks for the report. https://bitbucket.org/eigen/eigen/changeset/0c1b3329762c/ changeset: 0c1b3329762c user: ggael date: 2012-06-20 10:08:32 summary: fix bug 478: RealSchur failed on a zero matrix. https://bitbucket.org/eigen/eigen/changeset/e31c45aff2a5/ changeset: e31c45aff2a5 branch: 3.0 user: ggael date: 2012-06-20 10:08:32 summary: fix bug 478: RealSchur failed on a zero matrix. (transplanted from 0c1b3329762c1c7c709282004bae9a2ddda12c07) This bug seems to have reappeared in Eigen 3.3 (at least 3.3.1 and 3.3.2). 3.2.10 does not seem to reproduce this bug. Using the exact same test code as the original bug, I now get Output (Windows 10, Visual Studio 12): --- Eigenvalue calculation not successful (error code 2) (-4.8367e-026,-4.8367e-026) (-4.8367e-026,-4.8367e-026) (-4.8367e-026,-4.8367e-026) (-4.8367e-026,-4.8367e-026) (-4.8367e-026,-4.8367e-026) --- Output (RHEL 6.6, GCC 5.2.1) --- Eigenvalue calculation not successful (error code 2) (0,0) (0,0) (0,0) (0,0) (0,0) --- Fixed with unit tests this time! https://bitbucket.org/eigen/eigen/commits/db4fef573c20/ -- GitLab Migration Automatic Message -- This bug has been migrated to gitlab.com's GitLab instance and has been closed from further activity. You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.com/libeigen/eigen/issues/478. |