Also see http://trac.sagemath.org/sage_trac/ticket/6165.
On Sep 15, 9:28 am, kcrisman <kcris...@gmail.com> wrote: > > > As for you for now, you'd need to change the eigenvectors() command in > > > the matrix code. If you wanted to do so and submit a patch, it would be > > > greatly appreciated! > > But all doctests pass for me in alpha1: > > ./sage -t "devel/sage/sage/matrix/" > All tests passed! > Total time for all tests: 177.1 seconds > > > > > maxima-5.19.1 can be found in Sage sage-4.1.2.alpha1, but being an > > alpha, it is likely to be less stable than a 'stable' release of Sage. > > Note Sage 4.1.2 will be the first Sage to have a recent update of > > Maxima. The previous version, 4.1.1, does not. > > That's #6699 where the change went in. Note that the patch there > fixes similar eigenvector problems in doc/en/constructions/ > linear_algebra.rst and doc/en/tutorial/interfaces.rst, and, for that > matter, sage/interfaces/maxima.py > > But actually, the problem is already in 4.1.1, with the previous > Maxima: > > ---------------------------------------------------------------------- > | Sage Version 4.1.1, Release Date: 2009-08-14 | > | Type notebook() for the GUI, and license() for information. | > ---------------------------------------------------------------------- > sage: A = matrix(SR, [[1,2,3],[4,5,6],[7,8,9]]) > sage: A.eigenvectors_right() > UserWarning: Using generic algorithm for an inexact ring, which may > result in garbage from numerical precision issues. > # -*- coding: utf-8 -*- > UserWarning: Using generic algorithm for an inexact ring, which will > probably give incorrect results due to numerical precision issues. > # -*- coding: utf-8 -*- > TypeError: degree() takes exactly one argument (0 given) > sage: maxima_console() > Maxima 5.16.3http://maxima.sourceforge.net > > For some reason SR eigenvectors were never actually tested, I think - > because they inherit directly from matrix2.pyx! In fact, the error > comes from eigenspaces_left in that file, where G = self.fcp() calls > degree of a symbolic expression, which now requires an argument ! The > symbolic upgrade strikes again... I'll try to have a patch for this > soon. > > - kcrisman --~--~---------~--~----~------------~-------~--~----~ To post to this group, send an email to sage-devel@googlegroups.com To unsubscribe from this group, send an email to sage-devel-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-devel URL: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
