#17659: make symbolic series subclass of Expression
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       Reporter:  rws    |        Owner:
           Type:         |       Status:  needs_review
  enhancement            |    Milestone:  sage-6.5
       Priority:  major  |   Resolution:
      Component:         |    Merged in:
  symbolics              |    Reviewers:
       Keywords:         |  Work issues:
        Authors:  Ralf   |       Commit:
  Stephan                |  a4d2084a82b5f9e2ec3d43472181fccf42a19251
Report Upstream:  N/A    |     Stopgaps:
         Branch:         |
  u/rws/17659            |
   Dependencies:         |
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Comment (by rws):

 Nils, this is not about creating a ring but simple refactoring. No
 behaviour change.

 http://www.refactoring.com/catalog/replaceConditionalWithPolymorphism.html

 Replying to [comment:3 nbruin]:
 > I have nothing invested in how symbolics and series interact, but I see
 some immediate problems that would arise from subclassing Expression for a
 Series type:
 These problems already exist, so nothing is new.

--
Ticket URL: <http://trac.sagemath.org/ticket/17659#comment:4>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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