On 10/3/09, Hans W. Hofmann <hawe at chefmail.de> wrote:
> Maxima 18.1 wxmaxima 0.8.2
> EV:eigenvectors(A);
> [[[-(sqrt(481)-25)/2,(sqrt(481)+25)/2],[1,1]],
> [1,-(sqrt(481)-9)/20],[1,(sqrt(481)+9)/20]]
>
> Maxima 19.2 wxmaxima 0.8.3
> EV:eigenvectors(A);
> [[[-(sqrt(481)-25)/2,(sqrt(481)+25)/2],[1,1]],
> [[[1,-(sqrt(481)-9)/20]],[[1,(sqrt(481)+9)/20]]]]
>
> get different lists of eigenvectors
The return value of the eigenvectors function was changed to
distinguish the eigenvectors associated with different eigenvalues.
(For the record, that change was made after discussion on the
mailing list & mentioned in the change log for the 5.19 release.
Sorry for the trouble.)
The second example shown by ? eigenvectors is an example
which was handled incorrectly before.
Hope this helps
Robert Dodier