Li ye mathematician
Jia xian!
Zhu Shijie (simplified Chinese: 朱世杰; traditional Chinese: 朱世傑; pinyin: Zhū Shìjié; Wade-Giles: Chu Shih-chieh, fl thirteenth century), courtesy name Hanqing (汉卿), pseudonym Songting (松庭), was one of the greatest Chinese mathematicians lived during the Yuan Dynasty.
Zhu was born close to today's Beijing.
Two of his mathematical works have survived.
Qin jiushao
Introduction to Computational Studies (算学启蒙, Suanxue qimeng), written in 1299, is an elementary textbook on mathematics. Zhu included four illustrative problems to explain operations in arithmetic and algebra, adding 284 further problems as exercises.
This book also showed how to measure different two-dimensional shapes and three-dimensional solids. The Introduction had an important influence on the development of mathematics in Japan. The book was once lost in China until a copy of the book was made from a Korean source from a reprinted edition of 1660.
Zhu's second book, Jade Mirror of the Four Unknowns (四元玉鉴, Siyuan yujian), written i