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May 20, 2014 at 13:21 vote accept Paul Siegel
Mar 9, 2013 at 14:48 vote accept Paul Siegel
Mar 9, 2013 at 14:48
Mar 9, 2013 at 2:00 comment added Ian Agol Oh, I didn't notice the stackexchange link until posting my answer. I guess there's the fact that the part of the boundary of the convex hull which doesn't lie on the boundary of $K$ is composed of open intervals, which is pretty standard.
Mar 9, 2013 at 1:49 comment added Yoav Kallus This is basically the answer given on m.se, so I wonder what Paul found unsatisfying about the answer there.
Mar 9, 2013 at 0:30 history answered Ian Agol CC BY-SA 3.0