| Tenjutsu: A document on advanced mathematics written by Chong-Zhi ZU in which it is said that calculation methods for the circumference ratio and the volume of a sphere were written; it no longer exists. |
綴術…祖沖之が著した高等数学の書で、円周率や球体積の計算方法が書かれていたとされているが、現存しない。 |