# Jade Mirror of the Four Unknowns

> study of mathematics and algebra in ancient China, compiled by Zhu, Shijie in 1303

**Wikidata**: [Q14566684](https://www.wikidata.org/wiki/Q14566684)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Jade_Mirror_of_the_Four_Unknowns)  
**Source**: https://4ort.xyz/entity/jade-mirror-of-the-four-unknowns


## References

1. [Source](https://www.newton.com.tw/wiki/四元玉鑒/743318)
2. [Source](https://www.newton.com.tw/wiki/朱世傑)