He is a very great mathematician in the history of Chinese mathematics and occupies a prominent position in the history of world mathematics. His representative works "Nine Arithmetic Notes" and "Arithmetic on the Island" are China's most precious mathematical heritage.

Jia Xian

China was an outstanding mathematician in ancient Northern Song Dynasty. His works "Nine Chapters of Yellow Emperor's Arithmetic Fine Grass" (nine volumes) and "Arithmetic Ancient Collection" (two volumes) have been lost.

The main contribution is to create the "Jiaxian Triangle" and the method of power-power-power-power-power, which is the positive root method to find the higher power. At present, the principle and procedure of mixed division in middle school mathematics are similar, and the method of multiplication-multiplication-multiplication-multiplication-multiplication is more neat, simple and procedural than the traditional method, so it shows its superiority especially when it is used to open higher powers. This method was put forward more than 700 years before the conclusion of European mathematician Horner.

Qin dynasty (about 1202- 126 1)

Gu Dao, a native of Anyue, Sichuan, was an official in Hubei, Anhui, Jiangsu and Zhejiang. 126 1 year was demoted to Meizhou and died in the line of duty soon after. He, Yang Hui and Zhu Shijie are also known as the four great mathematicians in Song and Yuan Dynasties. I visited Hangzhou Taishi in my early years and studied mathematics with a recluse gentleman. 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

Ye Li (1 192- 1279)

Formerly known as Li Zhi,No. Jingzhai, a native of Luancheng in Jin Dynasty, once served as the prefect (now Yuxian County, Henan Province). Zhou Jun was destroyed by the Mongolian army in 1232, so he studied in seclusion. After only one year, he resigned and returned to his hometown. 1248 was written into the "circle-measuring sea mirror", the main purpose of which is to explain the use. It is equivalent to "let x be so-and-so", which can be said to be an attempt of symbolic algebra. Ye Li also has another mathematical work, "An Ancient Interpretation" (1259), which also explains the magic of celestial bodies.

Zhu Shijie (around 1300)

The word Han Qing, whose name is Songting, lives in Yanshan (now near Beijing), "traveled around the lake and sea with famous mathematicians for more than 20 years" and "gathered scholars by following the door" ("Mo Ruo and Zuyi: Preface to Philip Burkart's Meeting"). Zhu Shijie's representative works in mathematics include Arithmetic Enlightenment (1299) and Meeting with the Source of Thought (655). It influenced the development of mathematics in Korea and Japan. The encounter of thinking of source is another symbol of the peak of mathematics in China Song and Yuan Dynasties, among which the most outstanding mathematical creations are thinking of source (the formulation and elimination of multivariate higher-order equations), superposition (the summation of higher-order arithmetic progression) and seeking difference (the interpolation of higher-order).

Zu Chongzhi (429 ~ 500 AD)

His ancestral home is 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.

The main achievement in mathematics is the calculation of pi. He calculated pi as 3. 14 15926.