#4888: [with patch, positive review] laplacian_matrix() broken for DiGraphs
--------------------------+-------------------------------------------------
 Reporter:  mabshoff      |        Owner:  rlm     
     Type:  defect        |       Status:  new     
 Priority:  major         |    Milestone:  sage-3.3
Component:  graph theory  |   Resolution:          
 Keywords:                |  
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Changes (by mabshoff):

  * summary:  laplacian_matrix() broken for DiGraphs => [with patch,
              positive review] laplacian_matrix() broken for
              DiGraphs
  * milestone:  sage-3.4 => sage-3.3

Comment:

 Positive review for the fix suggested by rlm. I have attached the patch
 with a doctest and it passes {{{-t -long}}} with my current merge tree.
 Credit for authorship goes to David Perkinson in whose name I committed
 the patch.

 Cheers,

 Michael

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/4888#comment:3>
Sage <http://sagemath.org/>
Sage - Open Source Mathematical Software: Building the Car Instead of 
Reinventing the Wheel
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