I'm trying to compute the "product" of a couple of subgroups (the aim
being to build a set that is not a subgroup). My students know the
symmetries of a tetrahedron. Following code results in errors. I can
change the final line to variations that are not useful (like just
printing g and h individually) and the errors go away. Any
thoughts on how to make this work?
Thanks,
Rob
Code:
tetra=AlternatingGroup(4)
stab1=PermutationGroup_subgroup(tetra, ["(1,2,3)"])
stab4=PermutationGroup_subgroup(tetra, ["(2,3,4)"])
for g in stab1:
for h in stab4:
print g*h
Errors:
Traceback (most recent call last): print (g*h)
File "/opt/sage-3.0/local/lib/python2.5/site-packages/sympy/
plotting/", line 3, in <module>
File "element.pyx", line 1082, in
sage.structure.element.MonoidElement.__mul__ (sage/structure/element.c:
7301)
File "coerce.pyx", line 286, in
sage.structure.coerce.CoercionModel_cache_maps.bin_op_c (sage/
structure/coerce.c:5177)
File "permgroup_element.pyx", line 463, in
sage.groups.perm_gps.permgroup_element.PermutationGroupElement._r_action
(sage/groups/perm_gps/permgroup_element.c:3239)
File "permgroup_element.pyx", line 254, in
sage.groups.perm_gps.permgroup_element.PermutationGroupElement.__init__
(sage/groups/perm_gps/permgroup_element.c:1726)
File "/opt/sage-3.0/local/lib/python2.5/site-packages/sage/groups/
perm_gps/permgroup_named.py", line 130, in __init__
raise ValueError, "n (=%s) must be >= 1"%n
ValueError: n (=0) must be >= 1
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