刘徽的成就,除了圆周率算法,求解线性方程组(高斯消元法),等幂等积定理,更伟大的是(据English Wiki)

Through his work in the Nine Chapters, he could have been the first mathematician to discover and compute with negative numbers; definitely before Ancient Indian mathematician Brahmagupta (排23)started using negative numbers.

刘徽生活的魏晋时期,社会动乱但思想活跃。以后中国数学就走下坡路了。

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