surely there's an easy fix for this:
sage: G= PermutationGroup([])
sage: G
Permutation Group with generators []
sage: G.is_abelian()
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
/Users/pedro/<ipython console> in <module>()
/Applications/sage/local/lib/python2.5/site-packages/sage/groups/
perm_gps/permgroup.pyc in is_abelian(self)
1307 True
1308 """
-> 1309 return self._gap_().IsAbelian().bool()
1310
1311 def is_commutative(self):
/Applications/sage/local/lib/python2.5/site-packages/sage/structure/
sage_object.so in sage.structure.sage_object.SageObject._gap_ (sage/
structure/sage_object.c:2442)()
/Applications/sage/local/lib/python2.5/site-packages/sage/structure/
sage_object.so in sage.structure.sage_object.SageObject._interface_
(sage/structure/sage_object.c:2186)()
/Applications/sage/local/lib/python2.5/site-packages/sage/interfaces/
expect.pyc in __call__(self, x, name)
963 return x
964 if isinstance(x, basestring):
--> 965 return cls(self, x, name=name)
966 try:
967 return self._coerce_from_special_method(x)
/Applications/sage/local/lib/python2.5/site-packages/sage/interfaces/
expect.pyc in __init__(self, parent, value, is_name, name)
1281 except (TypeError, KeyboardInterrupt,
RuntimeError, ValueError), x:
1282 self._session_number = -1
-> 1283 raise TypeError, x
1284 self._session_number = parent._session_number
1285
TypeError: Gap produced error output
Error, usage: Group(<gen>,...), Group(<gens>), Group(<gens>,<id>)
executing $sage1:=Group([]);;
sage:
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