#16835: cartesian product of ModulesWithBasis not in ModulesWithBasis
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       Reporter:  cnassau     |        Owner:
           Type:  defect      |       Status:  new
       Priority:  major       |    Milestone:  sage-6.4
      Component:  categories  |   Resolution:
       Keywords:              |    Merged in:
        Authors:              |    Reviewers:
Report Upstream:  N/A         |  Work issues:
         Branch:              |       Commit:
   Dependencies:              |     Stopgaps:
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Comment (by cnassau):

 For the same reason this also fails:
 {{{
 sage: -Y.an_element()
 ---------------------------------------------------------------------------
 ValueError                                Traceback (most recent call
 last)
 ...
 ValueError: Free module generated by Integer Ring over Real Double Field
 (+) Free module generated by Integer Ring over Real Double Field is not in
 Category of vector spaces with basis over Real Double Field
 }}}

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Ticket URL: <http://trac.sagemath.org/ticket/16835#comment:1>
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