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Jul 31, 2015 at 22:29 vote accept N. G. M.
Jul 31, 2015 at 21:27 answer added Francesco Polizzi timeline score: 29
Jul 31, 2015 at 21:13 comment added Sam Hopkins The problem is deceptively hard because a "Jordan curve" can be very badly behaved and look quite different from what intuitively one might think of as a "closed curve."
Jul 31, 2015 at 21:06 review First posts
Jul 31, 2015 at 21:36
Jul 31, 2015 at 20:56 history asked N. G. M. CC BY-SA 3.0