Everyone, Many apologies, false alarm. This problem does indeed exist in Sage 4.7, but is fixed by patch trac_11316. I assumed this patch was part of 4.7, but apparently it's not.
Jeff On Jun 5, 12:25 pm, Jeff Stroomer <jstroom...@hotmail.com> wrote: > I installed sage 4.7 a moment ago, and am running into a problem with > term orders defined using matrices. The following works correctly: > > T = TermOrder(identity_matrix(2)) > R = PolynomialRing(GF(101), names = 'x, y', order = T) > print R.term_order().matrix() > > But if I negate the matrix, I run into a problem: > > T = TermOrder(-identity_matrix(2)) > R = PolynomialRing(GF(101), names = 'x, y', order = T) > print R.term_order().matrix() > > Traceback (most recent call last): > File "yyy.py", line 6, in <module> > print R.term_order().matrix() > File "/Applications/sage/local/lib/python2.6/site-packages/sage/ > rings/polynomial/term_order.py", line 1160, in matrix > return matrix(self.__matrix) > File "/Applications/sage/local/lib/python2.6/site-packages/sage/ > matrix/constructor.py", line 650, in matrix > raise ValueError, "Invalid matrix constructor. Type matrix? > for help" > ValueError: Invalid matrix constructor. Type matrix? for help > > Thanks for the help, > > Jeff Stroomer -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
