Help me look up the math story. Thank you.

1. Zu Chongzhi, ranked seventh, ranked first in the world, maintained for a thousand years; "The accuracy of a country's calculation of pi in history can be used as a sign to measure the level of mathematical development in this country at that time."

2. 1427, Arab mathematician Alkasi,16;

1596, Dutch mathematician Rudolf, 35 years old;

1990, with 480 million computers;

65438+February 6, 2002, Tokyo University, 124 1 1 billion.

◆"0"

Roman numerals have no 0;

In the fifth century, "0" spread from the East to Rome. At that time, the Pope was very conservative and thought that Roman numerals could be used to remember any number, so "0" was forbidden. A Roman scholar's handbook introduced some usages of 0 and 0, and the Pope tortured them after discovering it.

◆ Measure the Fiona Fang of the world with "rules" and "moments"

In the stone statue of an ancient building in Jiaxiang County, Shandong Province, there are two images of our ancient ancestors deified in ancient times, one is Fuxi and the other is Nu Wa. The object in Fuxi's hand is a compass, similar to a compass; The object in Nu Wa's hand is called Moment, which is in the shape of a square.

The Pigeonhole Principle in Ancient China

In the ancient literature of China, there are many successful examples of applying the pigeon hole principle to analyze problems. For example, in the Song Dynasty Fei Zhou's Records of Liang Man, the pigeon hole principle was used to refute the fallacy of superstitious activities such as "fortune telling". Fei Zhou pointed out that the year, month, day and hour (eight characters) of a person's birth are used as the basis for fortune telling, and the eight characters are used as the "drawer". Only 12×360×60 = 259200 different drawers. Taking people in the world as "things", the person who enters the same drawer must be Qian Qian, so the conclusion is that there are many people born at the same time. But since the "eight characters" are the same, "What's the difference between rich and poor?"

There are similar words in Qian Daxin's Collection of Thousand Words in Qing Dynasty, Ruan Kuisheng's Tea Guest Talk and Chen Qiyuan's Notes on Yongxianzhai. But unfortunately, although Chinese scholars have used the pigeon hole principle for the analysis of specific problems for a long time, there is no universal text about the pigeon hole principle in ancient literature, and no one abstracts it as a universal principle. Finally, they had to name this principle after hundreds of years as Dirichlet, a western scholar.

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