#16836: __neg__ fails in CartesianProduct of CombinatorialFreeModule
--------------------------+----------------------------
Reporter: cnassau | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.4
Component: categories | Keywords:
Merged in: | Authors:
Reviewers: | Report Upstream: N/A
Work issues: | Branch:
Commit: | Dependencies:
Stopgaps: |
--------------------------+----------------------------
{{{
sage: X=CombinatorialFreeModule(ZZ,ZZ)
sage: Y=cartesian_product((X,X))
sage: -Y.an_element()
---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)
<ipython-input-11-189fa298bf84> in <module>()
----> 1 -Y.an_element()
/waste/cn/sage-git/local/lib/python2.7/site-
packages/sage/categories/additive_magmas.pyc in __neg__(self)
920 """
921 return self.parent()(
--> 922 -x for x in self.cartesian_factors())
923
924 class Algebras(AlgebrasCategory):
/waste/cn/sage-git/local/lib/python2.7/site-
packages/sage/structure/parent.so in sage.structure.parent.Parent.__call__
(build/cythonized/sage/structure/parent.c:8902)()
/waste/cn/sage-git/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4203)()
/waste/cn/sage-git/local/lib/python2.7/site-
packages/sage/structure/coerce_maps.so in
sage.structure.coerce_maps.DefaultConvertMap_unique._call_
(build/cythonized/sage/structure/coerce_maps.c:4110)()
/waste/cn/sage-git/local/lib/python2.7/site-
packages/sage/combinat/free_module.pyc in _element_constructor_(self, x)
1527 except TypeError:
1528 pass
-> 1529 raise TypeError("do not know how to make x (= %s) an
element of self (=%s)"%(x,self))
1530
1531 def _an_element_impl(self):
TypeError: do not know how to make x (= <generator object <genexpr> at
0x7fd385148050>) an element of self (=Free module generated by Integer
Ring over Integer Ring (+) Free module generated by Integer Ring over
Integer Ring)
}}}
--
Ticket URL: <http://trac.sagemath.org/ticket/16836>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
--
You received this message because you are subscribed to the Google Groups
"sage-trac" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To post to this group, send email to [email protected].
Visit this group at http://groups.google.com/group/sage-trac.
For more options, visit https://groups.google.com/d/optout.
