#17756: expression matching doesn't work with symbolic_sum
-------------------------+----------------------------
   Reporter:  rws        |            Owner:
       Type:  defect     |           Status:  new
   Priority:  major      |        Milestone:  sage-6.5
  Component:  symbolics  |         Keywords:
  Merged in:             |          Authors:
  Reviewers:             |  Report Upstream:  N/A
Work issues:             |           Branch:
     Commit:             |     Dependencies:
   Stopgaps:             |
-------------------------+----------------------------
 {{{
 sage: w0 = SR.wild(0); w1 = SR.wild(1); w2 = SR.wild(2); w3 = SR.wild(3)
 sage: x.find(sum(w0,w1,w2,w3))
 ...
 TypeError: need a summation variable
 sage: x.find(sum(w0,x,w2,w3))
 ...
 TypeError:
 sage: x.find(sin(w0))
 []
 }}}

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Ticket URL: <http://trac.sagemath.org/ticket/17756>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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