# Si yuan shu

> Chinese quaternion invented by Zhu Shijie (Yuan dynasty mathematician) in 1303

**Wikidata**: [Q10924526](https://www.wikidata.org/wiki/Q10924526)  
**Source**: https://4ort.xyz/entity/si-yuan-shu


## References

1. [Source](https://www.newton.com.tw/wiki/四元術/8327213)