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只用三页纸，他就推翻了困扰学界半世纪的重要猜想
source link: https://tech.sina.com.cn/d/i/2019-07-04/doc-ihytcitk9560627.shtml
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来源：科研圈四色猜想是数学界最著名的猜想之一，即能否只用四种颜色给任意一张地图上色。这一猜想已经被证明是正确的，但它的衍生问题仍然让数学家着迷不已。最近，一位俄罗斯数学家发表了一篇仅有三页的论文，推翻了该领域存在了53年的一个重要猜想。今年
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