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This tag is used if a reference is needed in a paper or textbook on a specific result.
4
votes
0
answers
280
views
Reference for results about planar graphs
A colleague and I are writing a paper in which we need to make use of some basic facts about planar graphs. I would strongly prefer to simply give references for the results if possible, because the p …
10
votes
Accepted
Computer program for counting graph homomorphisms
EDIT: I have since found that the Digraphs package sometimes counts homomorphisms incorrectly. Perhaps this problem has been fixed in more recent versions though. I use Minion for counting homomorphis …
11
votes
1
answer
455
views
Correspondence between matrix multiplication and a graph operation of Lovász
In his book "Large networks and graph limits", Lovász describes a multiplication operation (he calls it concatenation) on "bi-labeled graphs". An $(m,n)$ bi-labeled graph is a graph in which some vert …