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Sep 18, 2013 at 18:15 comment added Aline Parreau Yes it is always good to know it :)
Sep 18, 2013 at 9:59 comment added Tony Huynh I agree. In general, I try to be pretty liberal with my answers to reference requests, since usually it is unclear what the OP is exactly looking for. Ergo, it is possible that some semi-related concept may be helpful. Sorry if it was not in this case. =)
Sep 18, 2013 at 9:53 comment added Aline Parreau I agree but it does not really help with my question : with my relation it already gives an upperbound on the chromatic number, but it could be very bad !
Sep 18, 2013 at 9:42 history undeleted Tony Huynh
Sep 18, 2013 at 9:42 history edited Tony Huynh CC BY-SA 3.0
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Sep 18, 2013 at 9:38 history deleted Tony Huynh via Vote
Sep 18, 2013 at 9:32 history answered Tony Huynh CC BY-SA 3.0