The ancients evaluation of Zu Chongzhi, how to evaluate Zu Chongzhi

Hehe, why the ancients? The ancients were very enthusiastic about agriculture, how much was pi used in agriculture? Or is it better for today's people Pi is useful in almost any field. It's a pity that not many people evaluate him.

There are no evaluations just that they are considered very knowledgeable.

Hua Luogeng: "Zu Chongzhi is not only a mathematician, but also proficient in astronomical calendars, mechanical manufacturing, **, and is also a writer. Zu Chongzhi formulated the "Ming Calendar", reformed the calendar, he calculated pi to seven decimal places, was the most accurate pi value in the world at that time, and the "dense rate" he created is famous all over the world.

Southern History": Chong Zhi Xie Zhong Lu Bose, at that time, he was unique, and he could not be the right person.

People's Daily Online: The mathematical research achievements of Zu Chongzhi's father and son are collected in his mathematical monograph "Fixation". This book is so profound that "scholars cannot investigate its profundity, so it is ignored".

In the official school of the Tang Dynasty, "Fixation" is also listed as one of the ten sutras that must be read, and it needs to be studied for 4 years, which is the first of all scriptures.

Zu Chongzhi, for the first time in the history of world mathematics, calculated the value of pi ( ) to the 7th decimal place, that is, to. He proposed a density rate of 22 7 and a density rate of 355 113, which was the earliest in the world, 1100 years earlier than in Europe, so some people advocate calling it "ancestral rate", the ancestor of pi. He compiled the results of his mathematical research into a book called "The Art of Fixation", which was once designated as a mathematics textbook in the Tang Dynasty.

The "Da Ming Calendar" compiled by him introduced "precession" into the calendar for the first time. It is proposed to set 144 leap months in 391 years. The length of a return year is calculated to be days, and the error is only about 50 seconds.

He was not only an outstanding mathematician and astronomer, but also an outstanding mechanical expert. We have recreated a variety of ingenious machines such as the long-lost guide car, the thousand-mile ship, and the water mill. After many years of calculation, he also compiled a new "Ming Calendar" of the Elimination of Branches

This was the most advanced calendar in the world at the time.

In addition, he also has research on **.

His works include "Commentary", "Interpretation of the Book of Filial Piety", "Yiyi", "Lao Tzuyi", "Zhuangziyi" and "Shu Yiji" and so on, but they have long been lost.

Zu Chongzhi (429 500 years), the character Wenyuan, was a native of Fanyang County (now Laishui County, Hebei Province), and was an outstanding mathematician and astronomer during the Northern and Southern Dynasties.

Zu Chong studied natural sciences all his life, and his main contributions were mathematics, astronomical calendars, and mechanical engineering. On the basis of the precise method of exploring pi pioneered by Liu Hui, he for the first time actuarially calculated "pi" to the seventh decimal place, that is, between and , and the "ancestral rate" he proposed made a significant contribution to the study of mathematics. It wasn't until the 16th century that the Arab mathematician Al Qasi broke this record.

The "Great Ming Calendar" written by him was the most scientific and progressive calendar at that time, and provided the correct method for the astronomical research of later generations. His main works include "Anbian Treatise", "Fixation", "Narrative of Differences", "Calendar Discussion" and so on.

The main contributions are: "assigning the ancestral rate", the "fixation" noisy, the reform of the leap method, the application of "precession", and the compilation of the "Ming Calendar".

In "Fixation", Zu Chongzhi raised the problem of "opening the difference power" and "opening the difference". The term "difference power" is found in Liu Hui's annotation to the Nine Chapters of Arithmetic, which refers to the difference in area.

"The power of the open difference" is the difference between the area and the length and width of the known rectangle, and its length and rise and width are found by the method of opening the square, and its specific solution method is to solve the problem of positive roots with a quadratic algebraic equation. The "opening difference" is to know the difference between the volume and the length, width and height of the cuboid, and use the method of opening the square to find its side length; It also includes the problem of knowing the volume of cylinders and spheres to find their diameters.

The calculation method used is already to solve the problem of the positive root with a cubic equation, and the solution of a cubic equation has never been done before, and Zu Chongzhi's solution is a pioneering feat.

Zu Chongzhi calculated that the true value of pi ( ) is between and , which is equivalent to being accurate to the 7th decimal place, which is simplified, and Zu Chongzhi was selected as the first scientist in the world to calculate the value of pi to the 7th decimal place by the World Records Association.

Reform of the intercalary law. Zu Chongzhi absorbed Zhao Cuo's theory, coupled with his own observations, and believed that the number of intercalations in the nineteenth year of seven leaps was too much, and it would be one day difference every two hundred years, and Zhao Cuo's six hundred and twenty-one intercalary numbers were not very accurate. Therefore, Zu Chongzhi proposed a new leap method for the leap month of 391 and 144.

Zu Chongzhi's leap week is extremely precise, according to his calculations, the length of a return year is days, and the difference between today's estimate is only 46 seconds.