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Aug 21, 2012 at 6:44 answer added Aaron Meyerowitz timeline score: 2
Aug 20, 2012 at 21:26 answer added Douglas Zare timeline score: 3
Aug 20, 2012 at 19:48 comment added Gjergji Zaimi The thing you proved is Helly's theorem in dimension 1, so it makes sense for it to have an explicit proof.
Aug 20, 2012 at 19:38 history edited john mangual CC BY-SA 3.0
added 8 characters in body
Aug 20, 2012 at 19:26 history edited john mangual CC BY-SA 3.0
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Aug 20, 2012 at 19:21 history edited john mangual CC BY-SA 3.0
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Aug 20, 2012 at 19:16 history asked john mangual CC BY-SA 3.0