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超越三维空间的奇异数系：没有它，就没有现代代数
source link: https://tech.sina.com.cn/d/v/2018-09-28/doc-ihkmwytp6251178.shtml
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来源：环球科学ScientificAmerican19世纪发现的“四元数”永久地改变了物理学和数学，它给予了数学家们一种描述空间旋转的新方式。如果把指向3点的时针往回拨动到12点，会经历怎样的过程？数学家早就知道如何将这种旋转简化成一个乘法
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