The rabbit hole led me to this discussion https://groups.google.com/forum/#!topic/sage-devel/QoboPuLUmw8
from a couple of years ago, and I see that the ticket http://trac.sagemath.org/ticket/4539#no1 has been merged into SAGE 5 (I have 6.0). So when I try the example in the Google group I get the following error: --- sage: F.<x,y,z,dx,dy,dz> = FreeAlgebra(QQ,6) sage: G = F.g_algebra({dx*x: x*dx + 1, dy*y: y*dy + 1, dz*z: z*dz + 1}) --------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-10-6517c692228f> in <module>() ----> 1 G = F.g_algebra({dx*x: x*dx + Integer(1), dy*y: y*dy + Integer(1), dz*z: z*dz + Integer(1)}) /opt/sage-6.0-i686-Linux/local/lib/python2.7/site-packages/sage/algebras/free_algebra.pyc in g_algebra(self, relations, names, order, check) 917 base_ring=self.base_ring() 918 n=self.ngens() --> 919 cmat=Matrix(base_ring,n) 920 dmat=Matrix(self,n) 921 for i in xrange(n): /opt/sage-6.0-i686-Linux/local/lib/python2.7/site-packages/sage/matrix/constructor.pyc in _matrix_constructor(*args, **kwds) 558 # check to see if the number of rows is specified 559 try: --> 560 import numpy 561 if isinstance(args[0], numpy.ndarray): 562 raise TypeError /opt/sage-6.0-i686-Linux/local/lib/python2.7/site-packages/numpy/__init__.py in <module>() 135 return loader(*packages, **options) 136 --> 137 import add_newdocs 138 __all__ = ['add_newdocs'] 139 /opt/sage-6.0-i686-Linux/local/lib/python2.7/site-packages/numpy/add_newdocs.py in <module>() 7 # core/fromnumeric.py, core/defmatrix.py up-to-date. 8 ----> 9 from numpy.lib import add_newdoc 10 11 ############################################################################### /opt/sage-6.0-i686-Linux/local/lib/python2.7/site-packages/numpy/lib/__init__.py in <module>() 11 12 import scimath as emath ---> 13 from polynomial import * 14 #import convertcode 15 from utils import * /opt/sage-6.0-i686-Linux/local/lib/python2.7/site-packages/numpy/lib/polynomial.py in <module>() 9 import re 10 import warnings ---> 11 import numpy.core.numeric as NX 12 13 from numpy.core import isscalar, abs, finfo, atleast_1d, hstack, dot AttributeError: 'module' object has no attribute 'core' --- How do I fix this? Thanks! -- You received this message because you are subscribed to the Google Groups "sage-support" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sage-support. For more options, visit https://groups.google.com/groups/opt_out.
