Introduce Zu Chongzhi Zu Chongzhi (z ch not ngzh:and, AD 429? AD 500) is an outstanding mathematician and scientist in China. People in the Southern and Northern Dynasties, Han people, the word Wen Yuan. Born in Yuanjia for six years and died in Hou Yongyuan for two years. His ancestral home is Qiu County, Fanyang County (now Laishui County, Hebei Province). My grandfather is in charge of civil engineering, and my father is knowledgeable. Zu Chongzhi received scientific knowledge from his family since childhood. When I was young, I entered Hualin University and engaged in academic activities. Throughout his life, he served as an official in South Xuzhou (now Zhenjiang), such as Shi, Fu joined the army, Lou Junling (now the northeast of Kunshan County), Servant Shooter and Changshui Captain. Its main contributions are in mathematics, astronomical calendar and machinery. In mathematics, he wrote a book "Composition", which was included in the famous "Ten Books of Calculating Classics" as a textbook of imperial academy in the Tang Dynasty, but it was later lost. Sui Shu? The chronicle of law left a short paragraph about pi (? ), Zu Chongzhi forget it? Its truth value is between 3. 14 15926 (number) and 3. 14 15927 (abundance), which is equivalent to the seventh place after the decimal point, and it is the most advanced achievement in the world at that time. This record was not broken by * * * mathematician Cassie until15th century. Zu Chongzhi, too? There are two fractional forms: 22/7 (approximate rate) and 355/ 1 13 (secret rate), in which the secret rate is accurate to the seventh place after the decimal point, and it was not rediscovered by the Dutch mathematician Otto until the west16th century. Zu Chongzhi and his son Zuxuan also used it successfully? Mou and Fang changed? The calculation problem of sphere volume is solved and the correct formula of sphere volume is obtained. In the astronomical calendar, Zu Chongzhi created the Daming Calendar, which introduced precession into the calendar at the earliest. New leap weeks of 39 1 year and 144 leap months are adopted. For the first time, the data such as the number of months and days at the intersection (27.25438+0223) and the number of days in the tropical year (365.2428) were accurately measured, and the method of measuring the length of the sun shadow at noon from winter to the days before and after was invented to determine the time of winter solstice. In mechanics, he has designed and manufactured a water hammer mill, a compass driven by copper parts, a thousand-mile ship, a timer and so on. In addition, he is also quite accomplished in melody, literature and textual research. Proficient in melody, good at playing chess, and also wrote a novel "The Story of Different Notes". He is one of the few well-read figures in history.

In memory of this great ancient scientist, people named a crater on the back of the moon? Zu Chongzhi crater? , named the asteroid 1888? Zu Chongzhi asteroid? .

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Zu Chongzhi worked hard to calculate the value of pi (л) to seven decimal places for the first time in the history of mathematics in the world, that is, between 3. 14 15926 and 3. 14 15927. He proposed an agreed rate of 22/7 and a secret rate of 355/ 1 13. This secret rate value was first put forward in the world, more than 1000 years before Europe, so some people advocate calling it? Ancestral rate? . He compiled his mathematics research results into a book called Seal Characters, which was once regarded as a mathematics textbook by Chinese studies in the Tang Dynasty. His Da Li Ming will be the first one? Precession? Introduce a calendar. It is planned to set 39 1 year 144 Yan Yue. The length of a tropical year is 365.338+04438+0 days, and the error is only about 50 seconds. He is not only an outstanding mathematician and astronomer, but also an outstanding mechanic expert. Rebuild all kinds of exquisite machinery, such as South Guide Car and Thousand-mile Ship, which have long been lost. Besides, he also studies music. His works, such as Explaining the Analects of Confucius, Explaining the Classic of Filial Piety, Yi, Lao, Zhuang and the novel Yi Shu Ji, have long been lost.