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Sep 1, 2015 at 13:39 answer added Jean Duchon timeline score: 2
Aug 31, 2015 at 15:51 answer added Igor Rivin timeline score: 4
Aug 31, 2015 at 14:55 comment added Boris Bukh @IgorRivin I misunderstood the question. I thought that the "half-sphere" referred to the fact that the geodesics (on a full sphere) must be contained in a half-sphere. Yes, it is non-trivial. I highly doubt that there is a nice answer. So, I retract my vote.
Aug 31, 2015 at 14:20 answer added Achim Krause timeline score: 0
Aug 31, 2015 at 13:37 comment added Igor Rivin @BorisBukh math.se is probably a better place, but the answer is not completely obvious.
Aug 31, 2015 at 13:34 review Close votes
Aug 31, 2015 at 20:05
Aug 31, 2015 at 13:18 review First posts
Aug 31, 2015 at 13:25
Aug 31, 2015 at 13:18 comment added Boris Bukh This is not a research-level question. Voting to migrate to math.se.
Aug 31, 2015 at 13:14 history asked Rahul Gangopadhyay CC BY-SA 3.0