The story of two mathematicians, the story of one mathematician

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The story of a mathematician - Su Buqing.

Su Buqing was born in September 1902 in a mountain village in Pingyang County, Zhejiang Province. Although his family is poor, his parents are frugal and work hard to provide for him to go to school. When he was in junior high school, he was not interested in mathematics, thinking that mathematics was too simple and he could understand it as soon as he learned it.

However, a later math class influenced the path of his life.

It was when Su Buqing was in his third year of junior high school, and he was studying in Zhejiang Province No. 60 Middle School, and there was a teacher Yang who had just returned from studying in Tokyo to teach mathematics. In the first class, Mr. Yang did not talk about mathematics, but told stories. He said:

In today's world, the law of the jungle eats the strong, and the world's great powers rely on the strength of their ships and guns to carve up China. The danger of China's extinction is imminent, and it is a move to revitalize science, develop industry, and save the country. 'The rise and fall of the world is the responsibility of the husband', and every student here has a responsibility.

He talked about the great role of mathematics in the development of modern science and technology. The last sentence of the lesson was: "In order to save the world, science must be revitalized."

Mathematics is the pioneer of science, and in order to develop science, it is necessary to learn mathematics well. Su Buqing didn't know how many classes he had heard in his life, but this class made him unforgettable for life.

Mr. Yang's class deeply touched him and injected new stimulants into his mind. Studying, not only to get rid of personal difficulties, but also to save the vast number of suffering people in China; Studying is not only to find a way out for individuals, but also to seek a new life for the Chinese nation. That night, Su Buqing tossed and turned, unable to sleep all night.

Under the influence of Mr. Yang, Su Buqing's interest shifted from literature to mathematics, and since then he has set up the motto of "reading without forgetting to save the country, and saving the country without forgetting to read". As soon as he became obsessed with mathematics, whether it was a scorching summer or midwinter, a frosty morning or a snowy night, Su Buqing only knew how to read, think, solve problems, and calculate, and he calculated tens of thousands of number learning problems in 4 years. Now Wenzhou No. 1 Middle School (that is, the Provincial No. 10 Middle School at that time) still treasures Su Buqing's geometry exercise book, which is written with a brush and is neat.

When he graduated from middle school, Su Buqing's homework was above 90 points.

At the age of 17, Su Buqing went to Japan to study and was admitted to the Tokyo Higher Technical School with the first place, where he studied hungrily. The belief in winning glory for the country drove Su Buqing to enter the field of mathematics research earlier, and while completing his studies, he wrote more than 30 articles**, achieved remarkable results in differential geometry, and obtained a doctorate in science in 1931. Before receiving his Ph.D., Su Buqing was already a lecturer in the Department of Mathematics at Imperial University of Japan, but just as a Japanese university was about to hire him as an associate professor with a good salary, Su Buqing decided to return to China and return to his ancestors who raised him to teach.

Su Buqing, who returned to Zhejiang University as a professor, lived a very difficult life. In the face of the predicament, Su Buqing's answer was, "What is the point of enduring hardship, I am willing, because I have chosen a correct path, which is a patriotic and bright road!" ”

This is the patriotic heart of the older generation of mathematicians.

Discipline construction is the foundation on which a university and a department depend. The Department of Electronic Engineering has always adhered to the needs of national development and aimed at the forefront of international electronic science and technology and electronic engineering development. The Department of Electronic Engineering has two first-level disciplines, namely Information and Communication Engineering and Electronic Science and Technology, which ranked first in the 2006 National First-level Discipline Evaluation. In the 2001-2002 National Key Discipline Evaluation, among the five sub-disciplines of the department, four sub-disciplines of communication and information systems, physical electronics, signal and information processing, and circuits and systems were rated as key disciplines, and semiconductor devices and microelectronics of the Institute of Microelectronics were also rated as key disciplines.

Eight-year-old Gauss discovered the theorem of mathematics.

Gauss (1777-1855), a famous German scientist, was born into a poor family. Gauss learned to do arithmetic on his own before he could speak, and one night when he was three years old, he watched his father calculate wages and corrected his mistakes in calculations.

When he grew up, he became one of the most prominent astronomers and mathematicians of our time. He made some contributions to the electromagnetism of physics, and one of the units of electromagnetism is now named after him. Mathematicians called him the "Prince of Mathematics".

At the age of eight, he entered a rural primary school. The math teacher was a man from the city, and he thought it was useless to teach a few young people to read in a poor rural area. And he is a little biased:

The children of the poor are born stupid, and it is not necessary to teach these stupid children to read, and if there is an opportunity, they should be punished to add some fun to this boring life.

It was a day of low mood for math teachers. When the students saw the teacher's depressed face, they cringed in their hearts, knowing that the teacher would arrest these students and punish them today.

You will count for me today the sum from 1 plus 2 plus 3 all the way up to 100. Whoever can't figure it out will be punished for not being able to go home for lunch. After the teacher said this, he picked up a ** without saying a word, sat on a chair and read it.

The children in the classroom picked up the slate and began to calculate: "1 plus 2 equals 3, 3 plus 3 equals 6, 6 plus 4 equals 10 .......""Some children add a number and then erase the results on the slate, and then add more, the number gets bigger and bigger, which is very difficult to calculate. Some of the children's faces were red, and some of them were sweating from their palms and foreheads.

In less than half an hour, little Gauss picked up his slate and stepped forward. "Teacher, is the answer so? ”

The teacher didn't raise his head, waved his fat hand, and said, "Go, go back and count again!" Wrong. He didn't think he would have an answer so soon.

But Gauss stood still and stretched out the slate in front of the teacher: "Teacher! I guess the answer is right. ”

The math teacher wanted to roar, but when he saw that the number was neatly written on the slate: 5050, he was amazed, because he had calculated it himself, and the number he got was also 5050, how could this 8-year-old kid get this value so quickly?

Gauss explained a method he had discovered, which was used by the ancient Greeks and Chinese to calculate series 1+2+3+....+n. Gauss's discovery made the teacher feel ashamed that he had not been right to look at everything and despise children from poor families. He also began to teach seriously, and often bought some math books from the city to study and lend them to Gauss.

With his encouragement, Gauss later made some important research in mathematics.

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Mathematical magician.

One summer day in 1981, a mental arithmetic competition was held in India. The performer is a 37-year-old woman from India whose name is Shaguntana. On that day, she had to compete with an advanced electronic computer with amazing mental arithmetic skills.

The staff writes a large number of 201 digits and asks you to find the 23rd root of the number. As a result, it took only 50 seconds for Shaguntana to report the correct answer to the audience. In order to arrive at the same number of answers, the computer has to input 20,000 instructions and then calculate them, which takes much more time than Shagontana.

This anecdote caused an international sensation, and Shagontana was called the "mathematical magician".