What did Zu Chongzhi make? What is Zu Chongzhi s work?

Zu Chongzhi was the first person in the world to calculate the number of pi to the seventh decimal place.

Zu Chongzhi's calculation of a year's time is only 50 seconds different from the results measured by modern astronomical science.

The "thousand-mile boat" created by Zu Chongzhi travels hundreds of miles a day.

Zu Chongzhi's water mill can lick rice and grind noodles at the same time.

Zu Chongzhi wrote a mathematical book "Fixation".

Zu Chongzhi's outstanding achievement in mathematics is about the calculation of pi Before the Qin and Han dynasties, people to"Trail three times a week"As pi, this is"Ancient rate"Later, it was found that the error of the paleorate was too large, and the pi should be"The circle diameter is more than three days", but how much is left, opinions differ Until the Three Kingdoms period, Liu Hui proposed a scientific method for calculating pi"Circumcision", use the circumference of the circle inscribed regular polygon to approximate the circumference of the circle Liu Hui calculates that the circle is inscribed with 96 polygons, and obtains =, and points out that the more sides of the inscribed regular polygon, the more accurate the value obtained Zu Chongzhi on the basis of the achievements of his predecessors, after hard work, repeated calculations, found In between and and obtained the approximate value in the form of fractions, taken as the approximate rate , taken as the dense rate, where the six decimal places are taken, it is the fraction of the closest value of the numerator denominator within 1000 What method did Zu Chongzhi use to get this result, Now there is no way to examine if it is assumed that he will press Liu Hui's"Circumcision"If you want to find this method, you have to calculate that the circle is connected with 16,384 polygons, which requires a lot of time and labor! It can be seen that his tenacious perseverance and intelligence in his scholarship are admirable Zu Chongzhi's calculation of the dense rate, it has been more than a thousand years since foreign mathematicians achieved the same result In order to commemorate Zu Chongzhi's outstanding contributions, some foreign historians of mathematics have suggested that = be called"Ancestral rate"．

Ji Heng Lao Bai did it, and drank out of the new world.

Zu Chongzhi invented pi and calculated the number of pi ( ) to the first person in the seventh decimal place. This is his greatest contribution. Wrote a mathematical book "Conjugation".

As for the other things he invented, most of them are legends. For example, water milling can lick rice and grind noodles at the same time.

Zu Ji's works as an accompaniment to Chongzhi are "Anbian Treatise" and "Fixation"."The Narrative of Differences"."Calendar".

Zu Chongzhi (429-500), the character is far away.

Born in Jiankang.

Born in Fanyang County (now Laishui County, Hebei), he was an outstanding mathematician and astronomer during the Northern and Southern Dynasties of China.

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 life of Zu Chongzhi

Zu Chongzhi, who studied the science of self-fighting all his life, mainly contributed to mathematics, astronomical calendar and mechanical manufacturing.

Zu Chongzhi was born in Fanyang Zu's family. He devoted his life to the study of natural sciences, and his main contributions were in mathematics, astronomical calendar, and mechanical engineering. He is in Liu Hui.

Pioneering exploration of pi.

On the basis of the precise method, for the first time, "pi" was actuarially calculated to the seventh decimal place.

That is, between and , the "ancestral rate" proposed by him has made a significant contribution to the study of mathematics. Until the 16th century, Arabia.

Mathematician Al Cassie broke the record.

Zu Chongzhi's main achievements include the astronomical calendar "Daming Calendar"; Pi is estimated to seven decimal places; Water mills, guide cars, thousand-mile boats, timers, etc. Zu Chongzhi was an outstanding mathematician and astronomer during the Northern and Southern Dynasties of China.

Zu Chongzhi set out to formulate a new calendar, and in the sixth year of Emperor Xiaowu of the Song Dynasty (462 AD), he compiled the "Great Ming Calendar". The Great Ming calendar was never adopted during Zu Chongzhi's lifetime, and it was not officially promulgated and implemented until the ninth year of Emperor Wu of Liang (510 AD).

In honor of this great ancient scientist, people named a crater on the far side of the moon "Zu Chong no Crater" and asteroid 1888 "Zu Chong no Asteroid".

Commemorative for posterity

The Road to Zuchong. The name of the road is meant to commemorate the outstanding contribution of the famous Chinese mathematician Zu Chongzhi, who is located in the Zhangjiang Hi-Tech Park in the Pudong New Area of Xian Zhang, Shanghai, China, and is the main road of the park.

The Garden of Zuchong. The name of the park is intended to commemorate the outstanding contribution of the famous Chinese mathematician Zu Chongzhi, and is located on the south side of Zu Chong Road, which is the third phase of Shanghai Pudong Software Park. The center of Zuchong Garden is the beautiful Huizhi Lake, and the office buildings of various well-known domestic and foreign enterprises are located around the lakeside.

Zu Chongzhi Middle School.

Located in Baoye Road, Laishui County, Baoding City, Hebei Province, it was the first middle school of Laishui County, which was founded in 1951 and renamed Hebei Zuchongzhi Middle School in 1992.

Zu Chongzhi is the first scientist in the world to calculate the value of pi to the 7th decimal place.

He invented and manufactured the water mill (the use of water to process grain); guide car driven by copper parts; A thousand-mile boat that can travel a hundred miles a day; A "device" is a timer that uses water.

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 first believed that "pi" was actuarially calculated to the seventh decimal place, that is, between and , and the "ancestral rate" proposed by him 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.

1. Mathematics: Zu Chongzhi calculated the true value between and , which is equivalent to being accurate to the 7th decimal place, which was simplified into the world's most advanced achievement at that time. Zu Chongzhi was selected as the first scientist in the world to calculate the value of pi to the 7th decimal place in the World Records Association, and the bridge limb created the world's largest in the China Discipline Association.

The Pythagorean theorem is a special case of the cosine theorem. This theorem is also known as the "Shang Gao Theorem" in China, and the "Pythagorean Theorem" or "Bainiu Theorem" in foreign countries is invented by Zu Chongzhi.

2. Calendar: Zu Chongzhi created the "Daming Calendar", and the most sensitive to the world introduced the precession into the calendar; A new leap week of 391 years plus 144 leap months was adopted; For the first time, the number of days in the month of the node (, the number of days in the return year () and other data were accurately measured, and the method of measuring the noon solar shadow length of several days before and after the winter solstice was also invented to determine the time of the winter solstice.

3. Machinery: He has designed and manufactured water milling, copper machine parts transmission guide cars, thousands of miles of boats, timers and so on. In addition, he also has attainments in music, literature, and evidence, he is proficient in music, good at playing chess, and also wrote ** "Narrative Differences".

He is a rare erudite figure in history.

Zu Chongzhi invented the water mill, the thousand-mile boat, and the timer.

1. Water milling:

Zu Chongzhi also made very useful labor tools. He saw that it was very laborious for the working people to make rice and flour, so he created a grain processing tool called water milling. The ancient working people invented the water reef and the water mill for grinding flour by using water power very early.

In the early years of the Western Jin Dynasty, Du Yu had improved it and invented the "Lianji Machine" and "Water Rotation and Grinding".

A connecting machine can drive several stone pestles to land together to the ground; One water-to-continuous mill can drive eight mills to grind at the same time. Zu Chongzhi further improved on this basis, combining the water mill with the water mill, and the production efficiency was further improved. This kind of processing worker is very exciting, and some rural areas in southern China are still using it.

2. Thousand-mile ship:

Zu Chongzhi also designed and built a kind of thousand-mile ship. It may be caused by the principle of using the wheel to rush forward, and it can travel more than 100 miles in a day.

3. Timer:

According to the records of the Spring and Autumn Period, Zu Chongzhi made a "Zhu Vessel" and gave it to Xiao Ziliang, the second son of Emperor Wu of Qi. It was used by the ancients to warn against complacency. When there is no water in the vessel, it is sideways.

When it is filled with water, if the amount of water is moderate, it is erected; If the water is full, it will fall to the side again and splash the water out.

This kind of utensil, the scholar Du Pre of the Jin Dynasty, tried to make it three times, but it was unsuccessful; Zu Chongzhi succeeded in copying it. It can be seen that the ancestral lead number Chongzhi has a deep study of various machinery.

Early Experience:

Zu Chongzhi once said in his writings that from a very young age, he "specialized in mathematics, searching for the past and the present". He collected almost all kinds of documents, records, and materials from ancient times to the time in which he lived.

At the same time, he advocated that he should never "make false assumptions about the ancients", never bind himself to the outdated and erroneous conclusions of the ancients, and personally carry out precise measurements and careful calculations. As he himself said, he always "measured the ruler himself, bowed to the omission, looked at the smallest detail, and made a poor plan."

Because of Zu Chongzhi's reputation for erudition and talent, he was sent by Emperor Xiaowu of the Southern Dynasty to Hualin Province, an academic research institution of the imperial court at that time, to do research work, and later quietly erected and served in the General Mingguan. At that time, the total Mingguan was the highest scientific research and academic institution in the country, equivalent to the ancient Chinese Academy of Sciences.

The total Ming Temple is divided into five disciplines: literature, history, Confucianism, Taoism, and yin and yang, and implements a system of professors in different disciplines, and invites famous scholars from all over the world to teach, and Zu Chongzhi is one of them. Here, Zu Chongzhi came into contact with a large number of national collections, including books on astronomy, calendars, and arithmetic, which had the prerequisites for reference and expansion.