Fix several bugs in the eigenvector code for 2x2 and 3x3 symmetric matrices.

This merge request fixes three bugs in the eigenvalue/eigenvector code for 2x2 and 3x3 symmetric matrices. Surprisingly, all three bugs can be triggered by using particular diagonal matrices.

added 1 commit

• bf4d88e4 - Fix bug in 3x3 eigenvalue computation

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added 1 commit

• d5ea06c1 - Fix and test eigenvector computation for the 3x3 zero matrix

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mentioned in merge request !838 (closed)

changed title from Make eigenvector computation of diagonal 2x2 matrices more stable to Fix several bugs in the eigenvector code for 2x2 and 3x3 symmetric matrices.

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enabled an automatic merge when the pipeline for d5ea06c1 succeeds

merged

mentioned in commit e73048ff