Tian yuan shu
- 天元术（天元术是中国古代建立高次方程的方法之一，由李冶和朱世杰等数学家在《测圆海镜》、《益古演段》、《算学启蒙下卷》、《四元玉鉴》中系统介绍）
Tian yuan shu
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abstract:
Tian yuan shu () is a Chinese system of algebra for polynomial equations created in the 13th century. It is first known from the writing of Li Zhi (Li Ye), though it was created earlier.
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