This entire problem is fixed by implementing proper comparison for Sage Sets:
http://trac.sagemath.org/sage_trac/ticket/9677
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Robert L. Miller
http://www.rlmiller.org/
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Chris,
On Mon, Jul 12, 2010 at 7:49 PM, Chris Godsil cgod...@uwaterloo.ca wrote:
... its the complicated vertices that are causing the problem, I expect.
The problem is that the comparison operators in Python for sets
implement the subset notion, and thus do not provide a proper sorting
of a
If G is a graph and A = G.am() is its adjacency matrix and B =
G.complement().am() is
the adjacency matrix of its complement, then A+B should be a 01-
matrix. The code below
shows that sage does not always share this viewpoint.
Cheers
Chris
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