Aug. 2, 2009 - People can be so precise
Day quote a little note on the extremely clear
First of all, our history with projections pi mathematical method is the Han Dynasty from the University ofWangmang killed for the year 2023, his rate is 3.1547 circle. Zhang Heng AD 2078 to AD, the Eastern Han era, and is well-known astronomer, and his pi is 731232 Note The original value of not knowing what may be the problem of non-original. This amendment value after approximately 3.1466. Liu Hui born around AD 25 0 ADforward to the Notes to the arithmetic Jiuzhang Note , he used to cut a round projection operation, that is, drawing a circle inside the hexagon, while a gradual increase in the number of polygons and circle it will become increasingly close to the edge polygon calculation, count to 90 hexagon, the circle was set at 3.14163 Note The original value for the 3.14 here, I do not know how much the original, but can be given here The more bits, the more we can help to determine another said that its perimeter is 90 hexagonal 3.141024. Wang Fan AD 219 to AD is 14245 3.155 ..., percutaneous extension cases before and after the year whenpeople do not test out of pi. According to Li Yan39s History of the Chinese operator, said Zu Chongzhi in before, there is an Edward AD 30 7 to, Chestnut Ugg 1760 Persephone Sandal circumference rate of 22 7, that is, 3.1428. These are not precision.
Zu Chong Zhi AD four hundred twenty-nine-five hundred years is when the Northern and Southern Dynasties Liusong, he calculated the circumference of the rate, according to Sui Shu that is less than 3.1415927 and 3.1415926, 3.14159265 can be as precise that it was 355113, roughly speaking, is a 22 7. Western Europeans can be so sophisticated, in a thousand years later 1573 Germany Otto Valentinus Otto, but he can only count to six decimal places.
Zu Chongzhi ofson is also a great mathematician, he found that the calculation of body size and volume of sphere formula. Because their reasoning is too sophisticated at that time, the management of cultural and educational matters, officials do not understand, so for the abolishment of the eye.
In the culture of ancient China, China39s mathematics is not very developed. China has been limited to practical mathematics, and practical comparison has nothing to do abstract reasoning to almost no contact. The most prominent contribution, I am afraid, is a pi. I am in junior high school, taught me Math is standard, Mr. Zhang Ke. He was known for writing fiction, was a funny man, and his students often hear his bookless. He has written a story of mathematics , which sets out that there is a European youth spent a very long time, circle the rate of the calculations to 600 decimal number. The pi, of course, there is no practical value.
At the time of writing the novel when, in order toto know more about the background, I have turned some of his ancestors, Chen Haining records and found that a groom and his father, Chenpeer 1676-1722. The Kangxi when Mr. Hanlin, everyone was a mathematical, author of Residual Shaoguang volume, the series some research and found a lot of it is said that our predecessors have never talked about the formula. The book has been looking for even the odd square of the cubic series and so on.
Qingyuan Postscript In this paper, the early Internet search has not found any other versions available for reference. Not the same as the original, UGG Classic Tall 5815-Black some brackets the Note to the exception, that I joined the Notes in UGG 5105 the content, is added by me or one year and replaced by the words of many years.
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