#6679: [with patch, needs review] Vertex Coloring, Edge Coloring (uses Linear
Programming)
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Reporter: ncohen | Owner: rlm
Type: enhancement | Status: new
Priority: major | Milestone: sage-4.1.1
Component: graph theory | Keywords:
Reviewer: | Author:
Merged: |
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Hello everybody !!!
Here are two new functions for the Graph class in Sage : vertex_coloring
and edge_coloring.
Those new functions both use Linear programming, so to use them you will
have to install the patches MIP-1 to MIP-5 in #6502 along with the package
GLPK :
http://trac.sagemath.org/sage_trac/ticket/6502
If you want them to be ever more efficient, you can also install COIN-
OR/CBC ( from #6603 ) with this line :
sage -f http://www-sop.inria.fr/members/Nathann.Cohen/cbc-2.3.spkg
I hope I learned what I had to with my previous patch, as I hope you will
find those functions sufficiently and correctly documented. These
functions should be ---way--- more efficient than the previous ones,
regardless of the Linear Solver you chose to use.
( I have to add that I will be absent next week, but even though I will be
able to answer any of your questions and to post fixes until tomorrow
evening. I chosed to post these two functions now hoping they could be
integrated with the patch for LP into the next release of Sage )
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/6679>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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