China ‘Gauss’: 秦九韶 Qin Jiushao

秦九韶 Qin Jiushao(1202-1261 AD): http://en.wikipedia.org/wiki/Qin_Jiushao

A Southern Song dynasty (南宋) officer. During his 3-yr leaves when his mother died, he generalised 孙子算经 (4th century)’s “Chinese Remainder Theorem” in ‘大衍求一术’. After leaves, he went back to chase money & women, produced no more Maths.

Note: ‘求一’: solve a.X ≡ 1 (mod b); a < b

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