Mathematician:Chia Hsien

Mathematician
Chinese mathematician best known for discussing Pascal's Triangle about $500$ years before.

Nationality
Chinese

History

 * Born: c. 1010 in Kaifeng, China
 * Died: c. 1070 in China

Theorems and Definitions

 * Pascal's Triangle

Writings

 * c. 1050: ("The Yellow Emperor's detailed solutions to the ")
 * Suanfa Xuegu Ji (A collection of ancient mathematical rules)

Both are now lost, but the first is referred to extensively in 's of $1261$.

Also known as

 * Simplified Chinese: 贾宪
 * Traditional Chinese: 賈憲
 * Pinyin: Jiǎ Xiàn
 * Wade–Giles: Chia Hsien