Dear all,
Im doing some numerics on symmetry reduced PDEs. For this it is necessary
to calculate the cahracters of some permutation group elments. In a precise
example I call
character(g**k)
where character is a character of the DihedralGroup(6), g an element of
this Group and k an integer in range(10). If the programm runs a long time
then I get in a nonreprodicible manner different Errorrs from gap like
File
"/usr/local/sage/sage-5.12/local/lib/python2.7/site-packages/sage/groups/class_function.py"
, line 279, in __call__ return self._base_ring(gap(g)._operation("^", self.
_gap_classfunction))
File
"/usr/local/sage/sage-5.12/local/lib/python2.7/site-packages/sage/interfaces/interface.py"
, line 1076, in _operation raise TypeError, msg
TypeError: Gap produced error output
Error, exceeded the permitted memory (`-o' command line option)
executing $sage21:=$sage63 ^ $sage87;;
Or
** Gap crashed or quit executing '$sage53:=PermList([5, 6, 4, 2, 3, 1]);;'
**
Restarting Gap and trying again
Error in lines 1-3
Traceback (most recent call last):
File
"/projects/323aa7f2-3ee3-43cd-ac05-4a21e6b0c3f6/.sagemathcloud/sage_server.py"
, line 733, in execute
exec compile(block+'\n', '', 'single') in namespace, locals
File "", line 2, in <module>
.......
.some traceback of my nested funcion calls
......
File
"/usr/local/sage/sage-5.12/local/lib/python2.7/site-packages/sage/groups/class_function.py"
, line 279, in __call__
return self._base_ring(gap(g)._operation("^", self._gap_classfunction))
File
"/usr/local/sage/sage-5.12/local/lib/python2.7/site-packages/sage/interfaces/interface.py"
, line 1076, in _operation
raise TypeError, msg
TypeError: Gap produced error output
Error, Variable: '$sage33' must have a value
executing $sage45:=$sage53 ^ $sage33;;
Does anybody have a clue what is happening here? Are the group elements not
supposed to be exponentiated a lot of times independently?
A possible workaround would probably be to calculate all the needed
characters of all group elements once and store them instead of
recalculating. I still would love to know what is going wrong here.
Thanks in advance for your replies,
Best,
Tobias
P.S.
All this happend on the sage installation on sagemath-cloud if this is of
importance.
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