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Feb 7, 2011 at 19:20 comment added Dave Pritchard I believe the best known bound is given by Tuza (Tuza, Z. (1985) Critical hypergraphs and intersecting set-pair systems. J. Combin. Theory Ser. B 39 134–145), at a coarse level it is $N(k)=\Theta(4^k/\sqrt{k})$
Feb 7, 2011 at 15:32 answer added Zsbán Ambrus timeline score: 3
Apr 16, 2010 at 15:55 answer added Zsbán Ambrus timeline score: 7
Apr 16, 2010 at 15:39 vote accept Zsbán Ambrus
Apr 16, 2010 at 8:29 answer added Pietro timeline score: 1
Apr 15, 2010 at 9:04 answer added gowers timeline score: 10
Apr 14, 2010 at 18:35 history edited Zsbán Ambrus CC BY-SA 2.5
fix phrasing of lemma 2
Apr 14, 2010 at 14:53 comment added François G. Dorais It's even more remarkable that the arguments were all the same. I also independently came up with the same argument, but I didn't post when I saw the flaw. I wonder just how many people did the exact same thing...
Apr 14, 2010 at 14:50 answer added François G. Dorais timeline score: 3
Apr 14, 2010 at 14:30 comment added Ben Webster He deleted it. This question is remarkable in having 3 deleted (wrong?) answers from very smart people.
Apr 13, 2010 at 19:04 history edited Zsbán Ambrus
edited tags
Apr 13, 2010 at 18:55 history asked Zsbán Ambrus CC BY-SA 2.5