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8楼deactivate 发表于 2025-3-26 15:43:47
Further Travels with My Ant,hat the breakthrough became possible by drawing the right picture. Once the picture is drawn, it becomes clear what must be proved, after which further study of the picture gives the clue for constructing the proof. It turns out that at one point one needs to use the Jordan curve theorem for a special class of closed curves.凶兆 发表于 2025-3-26 18:47:54
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