#13836: Fix variable dependence in PiecewisePolynomial
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       Reporter:  christiankuper              |         Owner:  burcin       
           Type:  defect                      |        Status:  needs_work   
       Priority:  major                       |     Milestone:  sage-5.6     
      Component:  symbolics                   |    Resolution:               
       Keywords:  Piecewise, critical_points  |   Work issues:               
Report Upstream:  N/A                         |     Reviewers:  Burcin Erocal
        Authors:  Andrew Fleckenstein         |     Merged in:               
   Dependencies:                              |      Stopgaps:               
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Changes (by christiankuper):

  * status:  needs_review => needs_work


Comment:

 Hello Andrew,

 I think there is still a small inconsistency in your code: In most methods
 you use the default_variable as the parameter. However, in
 critical_points() you just deleted old asignment of using "x" as the
 variable. While the other methods work with expressions with more than
 variable, critical_points() raises a TypeError.

 What would be even nicer than using the default_variable IMHO would be the
 use of the "var" parameter in the constructor (if defined). What do yout
 think? Or maybe this would be something for a nother patch.

 Christian

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13836#comment:17>
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