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（数学）有哪些让你赏心悦目的或震惊的构造手法？ - 知乎
source link: https://www.zhihu.com/question/319524699/answer/690321954
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想到了一个当年学微分动力系统时老师讲的故事：华人数学家李天岩提出并证明了“周期三意味着混沌”。他的…
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