Qin Jiuzhao was a famous mathematician in Song Dynasty, who wrote several books and nine chapters.
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Qin (1208- 1268), an ancient China native, was born in Zhou Pu (now Anyue County, Sichuan Province), and his ancestral home was Army County. A famous mathematician in the Southern Song Dynasty, together with Ye Li, Yang Hui and Zhu Shijie, he was called the Four Masters of Mathematics in the Song and Yuan Dynasties.
He studied astrology, rhythm, arithmetic, poetry, bow, sword and creation. He was a magistrate in Qiongzhou and was later demoted. Died in Meizhou, 1247 and completed the book "Nine Chapters of Shu Shu".
Among them, the great derivative method (the solution of the first congruence problem, now called China residue theorem), the triclinic quadrature method and the Qin algorithm (the numerical solution of the positive root of a higher order equation) are important contributions with world significance. In this paper, an algorithm for numerical solution of univariate polynomial equation of higher order-positive and negative cholesky decomposition is given.
Qin, the word is ancient. Originally from Lujun (now Fan County, Henan Province), he was born in (now Anyue County, Ziyang). China ancient mathematician. Born in the first year of Jiading in the Southern Song Dynasty (1208); He was demoted to Meizhou in the second year (126 1) and died in Meizhou in the fourth year (1268) at the age of 6 1.
Qin's father, Qin, is a scholar. He is a doctor and secretary with little supervision. Qin is clever and diligent. In the fourth year of Song Shaoding, he was a scholar in the Qin examination, and served as a county magistrate, a judge, a senator, a state guard, a farmer and a temple official.