#13221: Limit should not depend on dummy variable.
------------------------+---------------------------------------------------
   Reporter:  kcrisman  |             Owner:  burcin  
       Type:  defect    |            Status:  new     
   Priority:  minor     |         Milestone:  sage-5.3
  Component:  calculus  |          Keywords:          
Work issues:            |   Report Upstream:  N/A     
  Reviewers:            |           Authors:          
  Merged in:            |      Dependencies:          
   Stopgaps:            |  
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 See #12438 as well.

 Somewhere between Sage 4.4.4 and 4.8 we changed behavior - not correctly,
 I'd say.
 {{{

 $ Downloads/sage-4.8/sage
 ----------------------------------------------------------------------
 | Sage Version 4.8, Release Date: 2012-01-20                         |
 | Type notebook() for the GUI, and license() for information.        |
 ----------------------------------------------------------------------
 sage: f(x) = x^2
 sage: limit(f,x=1)
 x |--> 1
 sage: limit(f(x),x=1)
 1
 sage:
 Exiting Sage (CPU time 0m1.15s, Wall time 0m10.57s).
 karl-dieter-crismans-powerbook-g4-15:~ karl-dietercrisman$
 Desktop/sage-4.4.4-mcbc/sage
 ----------------------------------------------------------------------
 | Sage Version 4.4.4, Release Date: 2010-06-23                       |
 | Type notebook() for the GUI, and license() for information.        |
 ----------------------------------------------------------------------
 Loading Sage library. Current Mercurial branch is: hackbranch
 sage: f(x) = x^2
 sage: limit(f,x=1)
 1
 sage: limit(f(x),x=1)
 1
 }}}

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13221>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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