Hi, I've been reported that there could be a bug in the adjacency matrix. A math teacher reported that it looked like it is handled by GraphThing with swapped lines & columns. He also wondered whether it is possible to have a loop on a vertex, which I'm unable to figure out right now, since GraphThing is currently broken in Debian — I've just noticed that, trying to reproduce the problem that teacher mentioned, and I'm working on it. Cheers, -- Cyril Brulebois
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