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MathGroup Archive 2006

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DiscreteMath question : ToAdjacencyMatrix and FromAdjacencyMatrix

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66017] DiscreteMath question : ToAdjacencyMatrix and FromAdjacencyMatrix
  • From: "Jaccard Florian" <Florian.Jaccard at he-arc.ch>
  • Date: Thu, 27 Apr 2006 02:26:03 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com
  • Thread-index: AcZpJ8avWE6244LjSwS25KhrzDXj4Q==

Let us set :

paires = {{1, 2}, {2, 3}, {2, 4}, {4, 4}}

The graph is given by :

g = FromOrderedPairs[paires]; 

ShowGraph[g, VertexLabel -> {1, 2, 3, 4}]

The matrix representation of this relation is given by :

matrice = ToAdjacencyMatrix[g]

Why does ToAdjacencyMatrix[FromAdjacencyMatrix[matrice]] don't give the
same matrix?


Regards
 
F.Jaccard


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