This is now trac ticket #2946. -MH
On Apr 17, 4:02 pm, Marshall Hampton <[EMAIL PROTECTED]> wrote: > In Sage-2.11, jordan_form seems to crash on nilpotent matrices. For > example: > > sage: nil = matrix(QQ,2,2,[[0,1],[0,0]]) > sage: nil.jordan_form() > > gives: > > Traceback (most recent call last): > File "<stdin>", line 1, in <module> > File "/Volumes/D/sage-2.8.4.1/sage_notebook/worksheets/mh/78/code/ > 100.py", line 6, in <module> > nil.jordan_form() > File "/Volumes/D/sage-2.11/local/lib/python2.5/site-packages/sympy/ > plotting/", line 1, in <module> > > File "matrix2.pyx", line 3542, in > sage.matrix.matrix2.Matrix.jordan_form > File "/Volumes/D/sage-2.11/local/lib/python/site-packages/sage/ > matrix/constructor.py", line 812, in block_diagonal_matrix > return block_matrix(entries, **kwds) > File "/Volumes/D/sage-2.11/local/lib/python/site-packages/sage/ > matrix/constructor.py", line 776, in block_matrix > big.subdivide(running_total(row_heights[:-1]), > UnboundLocalError: local variable 'big' referenced before assignment > > I need this for an example in a class tomorrow, if anyone knows a work- > around it would be much appreciated. > -M. Hampton --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
