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
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