I am trying to have sage list the elements of a (finite) finitely generated
matrix group. It does not work on the cloud or on 6.1.1 on my linux
desktop, but does work on 5.9 on a mac.
Here is what I am trying to run:
x=polygen(QQ,'x')
E.<w>=NumberField(x^2+x+1,'w')
r=matrix([[w,0],[-w^2,1]])
s=matrix([[1,w^2],[0,w]])
G4 = MatrixGroup([r,s])
l = G4.list() # should return the elements of G as a list
Here is the error message on the cloud:
Traceback (most recent call last):
File
"/projects/00f50bac-d0a4-44e5-b456-34ae18b9117d/.sagemathcloud/sage_server.py",
line 733, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File "", line 1, in <module>
File "parent.pyx", line 822, in sage.structure.parent.Parent.__getattr__
(sage/structure/parent.c:6997)
File "misc.pyx", line 251, in sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1606)
AttributeError: 'FinitelyGeneratedMatrixGroup_generic_with_category' object has
no attribute 'list'
Here is the error message from 6.1.1 on a linux machine:
AttributeError Traceback (most recent call last)
<ipython-input-9-a6e94ecf7e4a> in <module>()
----> 1 G4.list()
/opt/sage-6.1.1-x86_64-Linux/local/lib/python2.7/site-packages/sage/structure/parent.so
in sage.structure.parent.Parent.__getattr__ (sage/structure/parent.c:6997)()
/opt/sage-6.1.1-x86_64-Linux/local/lib/python2.7/site-packages/sage/structure/misc.so
in sage.structure.misc.getattr_from_other_class
(sage/structure/misc.c:1606)()
AttributeError: 'FinitelyGeneratedMatrixGroup_generic_with_category' object
has no attribute 'list'
As I mentioned before, it works on 5.9 and "l" returns the 24 elements of
the matrix group in a list. Also, the newer version can not run
G4.is_finite(), whereas the old version does. This leads me to believe that
somewhere between 5.9 and the current release there were changes which
broke the matrix group functionality.
One more thing about this. In 6.1.1, type(G4) returns:
<class
'sage.groups.matrix_gps.finitely_generated.FinitelyGeneratedMatrixGroup_generic_with_category'>
But in 5.9 it returns:
<class
'sage.groups.matrix_gps.finitely_generated.FinitelyGeneratedMatrixGroup_gens_with_category'>
Best,
Ben
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