literary name Qianguang
flourished с 1261–75, Qiantang, Zhejiang province, China
Mathematician active in the great flowering of Chinese mathematics during the Southern Song dynasty .
His books are among the few contemporary Chinese mathematics works to survive. A collected edition of his works (1378) was transmitted farther to the east, where it was particularly influential. In Korea it was reprinted during the reign of Sejong in 1433, and it was copied again by the Japanese mathematician Seki Takakazu .