Hi,
It seems to me that the show method for DiGraphs is not working
correctly in Sage 3.4.
EXAMPLE:
sage: G = DiGraph({1:{2: 1}, 2:{1:1}})
sage: G.show()
sage: DiGraph(G.laplacian_matrix()).show()
1. The first call to show draws the graph with an edge missing.
2. The second call produces edges with no arrows.
3. Why should these be different?
4. In the second call, there should not be loops at each vertex.
David
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