Jia Xiou, an outstanding mathematician in the Northern Song Dynasty in ancient China, wrote Nine Chapters of Arithmetic Fine Grass of the Yellow Emperor (nine volumes) and Arithmetic Ancient Collection (two volumes), both of which have been lost.

His main contribution is to create the "Jiaxian Triangle" and the multiplication and division method, that is, the positive root method for finding the higher power. At present, the principle and procedure of mixed division in middle school mathematics are similar to this, while the method of multiplication and multiplication is neat, simple and more programmed than the traditional method, so it is especially advantageous to use it to open higher powers. This method was put forward more than 700 years before the conclusion of European mathematician Horner.

Qin

Qin (about 1202- 126 1), a native of Anyue, Sichuan, was an official in Hubei, Anhui, Jiangsu and Zhejiang, and was exiled to Meizhou (now Meixian, Guangdong) about 126 1 year ago. Shu Shu Jiu Zhang was written in 1247. The book consists of 18 volumes and 8 1 questions, which are divided into nine categories. His most important mathematical achievements-"total derivation" (first congruence group solution) and "extraction of positive and negative roots" (numerical value of higher order equation

Chungchi Tsu

Zu Chongzhi (AD 429-500) was born in Laiyuan County, Hebei Province. He was an outstanding scientist in the Southern and Northern Dynasties. He is not only a mathematician, but also familiar with astronomical calendar, mechanical manufacturing, music and other fields, and he is also an astronomer.

Zu Chongzhi's main achievement in mathematics is the calculation of pi. He calculated pi as 3. 14 15926.