#14777: is_isomorphic fails on empty graph
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   Reporter:  ajroberts     |             Owner:  jason, ncohen, rlm  
       Type:  defect        |            Status:  new                 
   Priority:  major         |         Milestone:  sage-5.11           
  Component:  graph theory  |          Keywords:  Graphs, Isomorphisms
Work issues:                |   Report Upstream:  N/A                 
  Reviewers:                |           Authors:                      
  Merged in:                |      Dependencies:                      
   Stopgaps:                |  
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 G=Graph()
 H=Graph()

 G.is_isomorphic(H) returns False

 It should return True

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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/14777>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
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