I am trying to get sage to list the elements of a (finite) finitely
generated matrix group.
It works in version 5.9 installed on a Mac, but not on 6.1.1 on linux or on
the cloud, which leads me to believe somewhere between 5.9 and 6.1.1 the
.list() operation for finite matrix groups was compromised. I just was
hoping to bring this to the attention of someone who might repair it for
future versions.
Here is the code:
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() # returns the elements of G as a list
Here is the error from 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 from 6.11 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'
And as I said before, it works and "l" prints the list of 24 matrices on
the 5.9 version on a mac.
Also, 5.9 says that type(G4) is
<class
'sage.groups.matrix_gps.finitely_generated.FinitelyGeneratedMatrixGroup_gens_with_category'>
But the cloud and 6.1.1 say
<class
'sage.groups.matrix_gps.finitely_generated.FinitelyGeneratedMatrixGroup_generic_with_category'>
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