#8678: Improvements for morphisms of ModulesWithBasis
-------------------------------------+-------------------------------------
       Reporter:  nthiery            |        Owner:  nthiery
           Type:  defect             |       Status:  needs_info
       Priority:  major              |    Milestone:  sage-6.4
      Component:  categories         |   Resolution:
       Keywords:  homsets, module    |    Merged in:
  morphisms, days64                  |    Reviewers:  Franco Saliola
        Authors:  Nicolas M. ThiƩry  |  Work issues:
Report Upstream:  N/A                |       Commit:
         Branch:                     |  a2f158c1ae29a9ff70e295e1dc028d1718fd09ac
  u/nthiery/categories/module-       |     Stopgaps:
  morphisms-8678                     |
   Dependencies:  #10668, #17160     |
-------------------------------------+-------------------------------------

Comment (by saliola):

 I wanted to make the following change:
 {{{
 +            sage: ult = lambda i: sum(  y[j] for j in range(i,4)  ) #
 uni-upper
 +            sage: phi = X.module_morphism(ult, triangular="lower",
 codomain=Y)
 }}}
 The comment `# uni-upper` should be uni-lower.

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Ticket URL: <http://trac.sagemath.org/ticket/8678#comment:66>
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