四色问题

By admin, 26 十月, 2021

世界近代三大数学难题之一。

https://baike.baidu.com/item/%E5%9B%9B%E8%89%B2%E5%AE%9A%E7%90%86/805159#:~:text=%E5%9B%9B%E8%89%B2%E5%AE%9A%E7%90%86%EF%BC%88%E4%B8%96%E7%95%8C%E8%BF%91%E4%BB%A3%E4%B8%89%E5%A4%A7%E6%95%B0%E5%AD%A6%E9%9A%BE%E9%A2%98%E4%B9%8B%E4%B8%80%EF%BC%89%EF%BC%8C%E5%8F%88%E7%A7%B0%E5%9B%9B%E8%89%B2%E7%8C%9C%E6%83%B3%E3%80%81%E5%9B%9B%E8%89%B2%E9%97%AE%E9%A2%98%EF%BC%8C%E6%98%AF%20%E4%B8%96%E7%95%8C%E4%B8%89%E5%A4%A7%E6%95%B0%E5%AD%A6%E7%8C%9C%E6%83%B3%20%E4%B9%8B%E4%B8%80%E3%80%82%20%E5%9B%9B%E8%89%B2%E5%AE%9A%E7%90%86%E7%9A%84%E6%9C%AC%E8%B4%A8%E6%AD%A3%E6%98%AF%E4%BA%8C%E7%BB%B4,%E5%B9%B3%E9%9D%A2%20%E7%9A%84%E5%9B%BA%E6%9C%89%20%E5%B1%9E%E6%80%A7%20%EF%BC%8C%E5%8D%B3%E5%B9%B3%E9%9D%A2%E5%86%85%E4%B8%8D%E5%8F%AF%E5%87%BA%E7%8E%B0%E4%BA%A4%E5%8F%89%E8%80%8C%E6%B2%A1%E6%9C%89%E5%85%AC%E5%85%B1%E7%82%B9%E7%9A%84%E4%B8%A4%E6%9D%A1%E7%9B%B4%E7%BA%BF%E3%80%82

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