PS: Thank you very much for dscm for the first monthly ticket of this month.

Kong Jidao sighed and said, "Meeting in the vast sea of ​​people is a kind of fate, and separation after being together is even more difficult to meet again. At that time, information was not developed, so I was thinking that maybe she had already started a family. Meeting again may only be embarrassing. It would be better to leave that beauty in my heart."

Kong Jidao's face showed a strange look. It was probably a very beautiful moment in his life. A trace of stubbornness and persistence flashed across Liu Meng's face, and he said with a smile: "I can't tell you that Teacher Kong was still very romantic when he was young. Let me tell me in detail."

Just as he was about to speak, Kong Jidao fainted suddenly. Liu Meng was rushed to the hospital and had been treated for more than two hours before Kong Jidao woke up slowly. Seeing Liu Meng standing beside him with a worried look on his face, Kong Jidao smiled and said, "Hehe, this old bone is really not good."

The doctor just told Liu Meng that Teacher Kong had exhausted all the oil and the lamp was dry, and his eyes couldn't help but burst into tears. Kong Jidao knew his situation and said with a smile: "Xiao Meng, we are scientific. If we don't do this, I suddenly had some ideas just now. Let's discuss the uncertain equation of the Goldbach conjecture..."

Liu Meng started discussing with Teacher Kong.

In the following days, Teacher Kong often was confused and shouted the name of a girl when she was a teenager. Seeing him like this, Liu Meng began to use all his relationships to inquire about the whereabouts of the girl. Unfortunately, the times were a bit far away, and he always broke the line after asking for information. He especially hoped to help them meet again.

Teacher Kong said in a daze: "I was born in a turbulent era. My young mind was greatly traumatized, I didn't have fun at home, and I was always bullied in elementary school. I felt that I was an ugly duckling. I was used to being beaten and never begging for mercy. I was an introvert and introverted personality. I fell in love with mathematics alone. It was not because I was suppressed, but because I was interested in mathematics, the study of arithmetics took up most of my time."

"When I entered junior high school, I came from a long and developed area. There was a very knowledgeable person from a long and developed area. There was a Chinese teacher with the highest level. Everyone admired him. But I didn't like Chinese. I like two math teachers from other places. Teachers from other places like me. These teachers often utter such words as science saving the country. I don't believe that science can save the country. But saving the country cannot be without science. Especially mathematics cannot be without mathematics. And mathematics is indispensable. People discriminate against me and punching and kicking, which can only make me fall in love with mathematics more. The boring algebraic equations make me happy and become the only fun."

"The teacher is knowledgeable and tireless. In mathematics class, he taught the students a lot of interesting mathematical knowledge. Students who don't love mathematics can be attracted by him, let alone students who love mathematics. Mathematics is divided into two parts: pure mathematics and applied mathematics. Pure mathematics deals with the relationship between numbers and spatial forms. In the part of dealing with the relationship between numbers, an important branch of the properties of integers is called number theory."

"Fema, a great French mathematician in the 17th century, was the founder of Western number theory. However, in ancient China, China had already made special contributions to number theory. "Zhou Ren" is the oldest classical mathematical work. Another earlier book "Sunzi Calculation Sutra". One of the remains theorems was first created by China. Later it was passed down to the West, called Sunzi Theorem, which is a famous theorem in number theory. Until the Ming Dynasty, China made great contributions to mankind in number theory. The pi calculated by Zu Chongzhi in the fifth century was more than a thousand years earlier than that of Otto in the Germans."

"The second half of the thirteenth century was the climax of ancient Chinese mathematics. Qin Jiushao, a great mathematician of the Southern Song Dynasty, wrote "Nine Chapters of the Number Book". His solution to the jointed-independent equation was more than 500 years earlier than that of the Italian great mathematician Euler. Zhu Shijie, a great mathematician of the Yuan Dynasty, wrote "The Four Yuan Jade Mirror". His solution to the multivariate higher order equation was more than 400 years earlier than that of the French great mathematician Bi Zhu. After the Ming and Qing Dynasties, China lag behind. However, the Chinese seem to have a special talent for mathematics. China should have great mathematicians. China is a good breeding ground for mathematics."

Teacher Kong said intermittently, as if he was recalling the road he had walked in this life. In his hard childhood, mathematics was the only pleasure.

"Once, the teacher told us high school students a famous problem in number theory. He said that at the beginning, Peter the Great of Russia built Petersburg and hired a large number of European scientists. Among them were the Swiss mathematician Euler; and a German middle school teacher named Goldbach, who was also a mathematician."

"In 1742, Goldbach discovered that every big even number could be written as the sum of two prime numbers. He tested many even numbers and all showed that it was true. But this needed to be proof. Because it had not been proved, it could only be called a conjecture. He himself could not prove it, so he wrote a letter to ask the famous great mathematician Euler and asked him to help make the proof. Until his death, Euler could not prove it. From then on, this became a difficult problem and attracted the attention of thousands of mathematicians. For more than two hundred years, many mathematicians have tried to prove this conjecture but failed."

"At this point, the classroom became a pot of water. The young students, who were like the first flowers, started to chatter. The teacher also said that the queen of natural science is mathematics. The crown of mathematics is number theory. The Goldbach conjecture is the jewel in the crown. The students all stared in surprise."

"The teacher said, you all know even numbers and odd numbers, and you also know prime numbers and combined numbers. We taught these in the third grade of elementary school. Isn't this the easiest? No, this problem is the most difficult. This question is very difficult. If anyone can do it, it's amazing, that's amazing!"

"The classmates started arguing again. What's so great about this? Let's do it. We can do it. They boasted about Haikou. The teacher laughed. He said, 'Really, I had a dream last night. I dreamed that there was a classmate among you who was amazing. He proved the Goldbach conjecture.'"

"The high school students burst into laughter. But I didn't laugh. I was also shocked by the teacher's words, but I couldn't laugh. If I smiled, there would still be classmates who would stare at me with rolling eyes. Since I entered high school, I became more and more lonely. The classmates thought I was weird, dirty, and sick, and ignored me. They looked at me with contempt and sarcastic eyes. I became a lonely and lonely person who was always walking alone, talking to myself, and was lonely. In the sky, there was a lonely goose. At that time, I felt that I must have solved the Goldbach conjecture and picked the pearls in this number theory."

"The next day, the class was in again. Several very hard-working students excitedly gave the teacher a few answers. They said that we have done it and can prove the German conjecture. We can prove it in many ways. There is nothing extraordinary. Ha! Ha!"

"Forget it!" the teacher said with a smile, "Forget it! Forget it!"

"Let's forget it, forget it. We've figured it out!" the students shouted.

"You guys forget it! OK OK, I mean, forget it, what are you doing in vain? I can't read these papers, so there is no need to read them. Is that easy? You want to ride your bicycle to the moon." The teacher's words were very sharp.

"A burst of laughter broke out in the classroom. Those students who had not handed in the paper laughed at the few who handed in the paper. They also laughed, and they all stomped their feet and laughed. But I didn't laugh. I have always been excluded from all this joy."

"The next year, the teacher went back to Tsinghua University. He should have forgotten these two math classes long ago. How could he know how profoundly he was engraved in my memory. Because there are many classmates, teachers are easy to forget, but students often remember their young teachers."

"That year, I was in the third grade of high school. Because I couldn't afford the tuition, I didn't go to school and studied at home for a semester. I didn't graduate from high school, but I applied for the same degree and was admitted to Bingcheng University of Technology. That year, there was only the Department of Mathematics and Physics in the university. When I was in the second grade of university, I had a math group, but there were only four students. By the third grade, there was a department of mathematics, and these four people in the department were still there. Because of their excellent grades and the country urgently needed to cultivate talents, the four of us graduated early; and, immediately assigned work and received preferential treatment, I was envious of it."

"However, it's not true for me! When I was in college, my life was easy. There were only four college students in the same group, four professors and one assistant to guide my studies. How hungry and greedy I was sucking and drinking among the flowers to make fragrant and fragrant math honey! The learning effect was very high. How free and easy I was in the abstract field!"

As Teacher Kong said, his face was rosy, and his eyes were shining. He grabbed Liu Meng and said, "Xiao Meng, the Goldbach conjecture has troubled me for the rest of my life, but it still cannot be solved. You can definitely solve it. Promise me and I will definitely solve her, okay?"

Liu Meng was very sad. He knew that he was looking back and said firmly: "Teacher Kong, don't worry, I will definitely solve the Goldbach conjecture. You just said that our China has always been ahead of the world in mathematics, but modern times have been wasted. I will definitely leave this pearl in our China."

"If life can be repeated, I will make such a choice. I have been pursuing it all my life, and I never feel lost and empty for a moment. My favorite mathematics is time to say goodbye." After saying that, Teacher Kong left with a smile.
Chapter completed!