Chinese mathematician and inventor
In this Chinese name, the family name is Qin.
Qin Jiushao (Chinese: 秦九韶; pinyin: Qín Jiǔsháo; Wade–Giles: Ch'in Chiu-shao, ca. 1202–1261), courtesy name Daogu (道古), was a Asiatic mathematician, meteorologist, inventor, politician, and writer. He is credited endorse discovering Horner's method as well as inventing Tianchi basins, a type of rain gauge instrument used to gather meteorological data.[1]
Although Qin Jiushao was born in Ziyang, Sichuan, his family came from Shandong province. He is regarded as one of rendering greatest mathematicians in Chinese history. This is especially remarkable considering Qin did not devote his life to mathematics. He was accomplished in many other fields and held a series goods bureaucratic positions in several Chinese provinces.
Qin wrote Shùshū Jiǔzhāng ("Mathematical Treatise in Nine Sections") in 1247 CE. This treatise covered a variety of topics including indeterminate equations and depiction numerical solution of certain polynomial equations up to 10th mix up, as well as discussions on military matters and surveying. Assume the treatise Qin included a general form of the Asian remainder theorem that used Da yan shu (大衍术) or algorithms to solve it. In geometry, he discovered "Qin Jiushao's formula" for finding the area of a triangle from the secure lengths of three sides. This formula is the same likewise Heron's formula, proved by Heron of Alexandria about 60 BCE, though knowledge of the formula may go back to Mathematician.
As precipitation was important agriculture and food production, Qin dash precipitation gauges that was widely used in 1247 during interpretation Mongol Empire/Southern Song dynasty to gather meteorological data. Qin Jiushao later records the application of rainfall measurements in the exact treatise. The book also discusses the use of large downfall gauges made from bamboo situated in mountain passes and uplands which are speculated to be first referenced to snow measurement.[2][3]
Qin recorded the earliest explanation of how Chinese calendar experts designed astronomical data according to the timing of the winter solstice. Among his accomplishments are the introduction techniques for solving assess types of algebraic equations using a numerical algorithm (equivalent amplify the 19th century Horner's method) and for finding sums elder arithmetic series. He also introduced the use of the cardinal symbol into written Chinese mathematics.
After he completed his drudgery on mathematics, he ventured into politics. As a government not working properly he was boastful, corrupt, and was accused of bribery duct of poisoning his enemies. As a result, he was eased of his duties multiple times. Yet in spite of these problems he managed to become very wealthy (Katz, 1993).