#6236: find the dual graph of a planar graph
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       Reporter:  jason         |        Owner:  rlm
           Type:  enhancement   |       Status:  new
       Priority:  major         |    Milestone:
      Component:  graph theory  |   Resolution:
       Keywords:                |    Merged in:
        Authors:                |    Reviewers:
Report Upstream:  N/A           |  Work issues:
         Branch:                |       Commit:
   Dependencies:                |     Stopgaps:
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Comment (by ayyer):

 Great, thanks! I'll use that. Should I create a new branch and add it to
 the graph methods in graph.py? What is a class of planar examples which
 are 3-edge-connected? I thought of grid graphs, but they fail. :(

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Ticket URL: <http://trac.sagemath.org/ticket/6236#comment:13>
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