He Tiantian walked cleanly and quietly, without any farewell ceremony.??    ?

On Monday morning, the classmate He Tiantian was absent. At first he thought he was sick or had a leave of absence. Then in Mandarin class, Zhu Qingjia said lightly: "Student He Tiantian has transferred to other schools since last week due to family reasons." So far, it means that He Tiantian's study and life in Huai'an Mansion was completely outlined.

Regarding He Tiantian's low-key runaway, most of the students thought that he lost to Jiang Shuiyuan in the class leader election, and felt that he had no face to see Jiang Dong's elders again, so he chose to escape. However, Wu Zichen, who knew the truth best, remained silent about this, and even deliberately quoted the speculations of his classmates in the class to mislead Jiang Shuiyuan, which led to Jiang Shuiyuan also believed that He Tiantian was Xiang Yu in the first (second) class of high school. He transferred to school without success, and was quite proud of his backbone.

As the days passed, the heavy workload was coming with the momentum of dark clouds. The activities organized by various clubs in the school were one after another. Everyone quickly devoted themselves to their studies and club activities. In just three or five days, they forgot that there was a classmate named He Tiantian in the class. After these hard work, Zhang Jin from Class 1 (11) finally previewed mathematics to the first semester of the second year of high school, and completely solved the problem of washing clothes.

Speaking of which, after Ge Juntian finished assigning the questions, he found that this question required the knowledge points of the second year of high school when he returned to the teaching and research group. He wanted to change the question to them. He thought that the saying "no anger, no enlightenment, no confusion" in "The Analects of Confucius" is also very reasonable, that is, when the students try hard to figure it out but still can't figure it out, don't enlighten him first. Moreover, they are both successful students who have chosen thousands of times, and they will win the gold medal in the International Mathematics Olympiad in the future. How can this high school degree problem be difficult for them?

In the blink of an eye, more than a week passed, and the two of them still did not come to the door, which made Ge Juntian a little annoyed. At this moment, Zhang Jin knocked on the door of the mathematics teaching and research group in the second year of high school. Seeing that it was Zhang Jin, Ge Juntian was both happy and disappointed, but he still asked with a smile: "Zhang Jin, have you done the question? Is it difficult?"

"It's done, it's a bit difficult for me!" After saying that, Zhang Jin respectfully sent the two answers to Ge Juntian, "This one is mine, and the other is from Jiang Shuiyuan!"

Ge Juntian asked casually while looking at the answer: "Why didn't that little brat in Jiang Shuiyuan come to see me?"

Zhang Jin explained: "Jiang, Jiang Shuiyuan was early, and he did it the night you set the question. Then he handed the answer to me and told me to have the knowledge point "mean inequality" in the first semester of the second year of high school. I asked him why he didn't give the answer directly to you. He said that because he would not participate in the activities of the Mathematics Group of the Olympic Games in the future!"

Ge Juntian looked around and knew that the answers of the two were correct, especially the proof given by Jiang Shuiyuan was a standard. But when he heard that Jiang Shuiyuan did not participate in the math group activities afterwards, he suddenly turned his face: "Why? Did he say the reason?"

Zhang Jin continued: "It seems that it is because of him that many mathematicians now have very short lives, so they are--"

"What's this a bullshit reason?" Ge Juntian was dumbfounded and immediately said: "I will look for him alone in Jiang Shuiyuan's affairs later, but it is very rare for you to study the senior year courses by yourself and solve this problem independently. Because self-study is the most effective way to continue to move forward. Next, you can continue to preview future courses. Don't just be satisfied with the senior year level, strive to get involved in the senior year of high school and even university as soon as possible to see what level you can reach! In addition, I will give you another question, and you can think slowly and see if it can be solved within a week.

"The problem is this. You should have played Go or Go? You can pick two pieces from the chess jar, there will be three possibilities: all black, all white or one black and one white. According to the probability, if you catch all black, all white is one quarter, and one half of the chance of one black and one white. When you catch the same color, you will feel a coincidence. But if you catch three pieces casually, then I can boldly assert that there must be two pieces of the same color. As the number increases, it will become inevitable, and there are profound mathematical principles in it!

"You have learned the most obvious part of the principle in elementary school. It is called the drawer principle, sometimes called the pigeon nest principle. But as an important principle in combinatorial mathematics, it has more wonderful uses. For example, when you grab 5, 8, 1oo, and 15o1 Go pieces, how many of them must be of the same color? For example, it is not a black and white color Go, but seven different colors of jigsaw puzzles. If you grab 1oo, how many of them must be of the same color? So when we learn mathematics and study mathematics, we need to present profound principles from simple phenomena, and then use profound principles to solve a series of simple or complex problems.

"The Mathematics Olympiad is nothing more than testing your abilities. One is to have a comprehensive grasp of knowledge points, and the other is to use knowledge points flexibly. Now you are studying the knowledge of the second year and third year of high school to achieve the first point, and the key is to train the second point. Today's question is based on the drawer principle you have learned to prove that any 6 people are together, there will inevitably be three people who have known each other long ago or never know each other."

After seeing off Zhang Jin, Ge Juntian pinched the bell and came to the door of Class 1 (2) of high school after the end of get out of class rings, and called Jiang Shuiyuan out directly.

Although Ge Juntian had seen Jiang Shuiyuan once before, that time was at night, and his attention was mainly focused on selecting his favorite students, and he did not pay much attention to Jiang Shuiyuan's appearance. This time it was the brightest time in the morning of October when the sun was shining. Jiang Shuiyuan wore a light pink T-shirt without any patterns, slightly white-washed jeans, and light gray canvas shoes on his feet. He suddenly walked into the sun, as if the whole noisy corridor suddenly became quiet, and everyone became his supporting role.

Ge Juntian was a little lost for a few seconds, and even a strange thought suddenly appeared in his mind: Yes, how could such a young and handsome boy learn boring mathematics? It was simply a crime against all the girls in the school! A boy like him should go to a literary club, or learn dance and music. In front of all the students in the school during the warm spring breeze or the clear autumn weather, recite a poem he wrote, or dance a street dance, sing a love song, and make everyone shout wildly for it. That is the real life!

A wind passed through the corridor, and the black and soft head rose with the wind. The river water source tilted its head. I didn't know whether to avoid the bright sunshine or the frivolous autumn wind, and then asked, "Teacher Ge, are you looking for me?"

Ge Juntian came to his senses and hurriedly said, "I heard from Zhang Jin that you don't want to participate in the activities of the Mathematics Group of the Olympic Games Society in the future?"

"Yes." Jiang Shuiyuan replied simply.

"Why?"

"Because many mathematicians have short lives!"

"That's it?" Ge Juntian looked at Jiang Shuiyuan's expression and was so angry that he was about to go crazy: "Why tell me which mathematicians are short-lived ghosts?"

Jiang Shuiyuan said with his fingers: "According to the Biography of the World Famous Mathematicians alone, mathematicians who died before the age of 40 include Galou, Pascal, Hans' Riemann, Hankel, Ramanujin of India, Abel of Wandao, Ramsey of Britain, Kovalevskaya of Rakshasa... In addition, there are many mathematicians who have extraordinary performance, such as Qin Jiushao, a mathematician of the Southern Song Dynasty in my country, who was cruel and unkind, and recorded in history; in the Bernoulli family in Switzerland, John and Daniel became enemies. I think it is best to stay away from mathematics for the sake of their own wealth and life!"

Ge Jun retorted in a slight weather: "What you are talking about are low-probability events. Most mathematicians live very long. For example, the Greek great mathematician Pythagoras was 76 years old, Diopanto was 84 years old, the British great mathematician Newton was 85 years old, and the Swiss great mathematician Euler was 76 years old. Especially in modern times, many famous mathematicians live longer than 90 years old, or even one hundred years old, such as the great mathematicians of my country Su Buyun, Chen Shengwu, the great mathematician of Gaul, the great mathematician Russell of the British great mathematician, and the American great mathematician Polya, the last three lived to be 98 years old! If you don't believe it, you can count the lifespan of great mathematicians around the world in the past hundred years and see what the result is?"

Jiang Shuiyuan muttered: "A low probability event does not mean that it will not be born. Once it is born in someone, it will be a living tragedy!"

"What do you want? What are you doing in the world that you die prematurely?" Ge Juntian was furious, "Tell you that the death toll of more than one million people in the world due to work-related injuries every year, and the death toll of nearly one million people in road traffic accidents is also nearly one million. Do you not work or walk anymore? In addition, there are 1.8 people in the world every second, that is, 106 people die every minute, 636 people in an hour, and 15264 people in a day. Do you not even want to do it?"

Jiang Shuiyuan was waiwai's head: "You are right!"
Chapter completed!