# Mathematician:Chia Hsien

## Mathematician

**Chia Hsien** or **Jia Xian** (贾宪) was a Chinese mathematician best known for discussing Pascal's Triangle about 500 years before Pascal.

## Nationality

Chinese

## History

- Born: c. 1010, China
- Died: c. 1070, China

## Theorems and Definitions

## Writings

*Huangdi Jiuzhang Suanjing Xicao*(The Yellow Emperor's detailed solutions to the Nine Chapters on the Mathematical Art)*Suanfa Xuegu Ji*(A collection of ancient mathematical rules)

Both are now lost, but the first is referred to extensively in Yang Hui's *Xiangjie Jiuzhang Suanfa*.