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May 4, 2012 at 15:02 vote accept Mateus Araújo
May 4, 2012 at 15:02 comment added Mateus Araújo Since I only need pairwise incomparable sets and your construction is simpler, I'm going to accept your answer.
May 3, 2012 at 22:16 history answered Goldstern CC BY-SA 3.0