Kong Jidao sighed and said: "Meeting in the vast sea of people is a kind of fate, and the separation after being together, it is even more difficult to meet again, at that time, the information was not developed, I was thinking that maybe she had already married a family, I am afraid that meeting again will only be embarrassing, it is better to leave that beauty in my heart." ”

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

Just wanted to speak, Kong Jidao fainted suddenly, Liu Meng was urgently sent to the hospital, and after more than two hours of treatment, Kong Jidao woke up leisurely, and saw Liu Meng standing next to him with a worried face, Kong Jidao showed a smile and said: "Hehe, this old bone is really bad." ”

Just now the doctor told Liu Meng, Mr. Kong has run out of oil and the lamp has dried up, and his eyes can't help overflowing with crystal tears, Kong Jidao knows his own situation, and said with a smile: "Xiao Meng, we are engaged in science, don't come to this set, just now I suddenly had a little idea, let's discuss the uncertain equation of Goldbach's conjecture......

Liu Meng and Mr. Kong discussed together.

In the following days, Mr. Kong was often confused, shouting the name of the girl in his youth, Liu Meng saw him like this, and began to use all his connections to inquire about the whereabouts of this girl, but unfortunately the times are a little far away, and the line is broken when he always inquires, especially hoping 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 primary school. I felt like an ugly duckling, used to being beaten and never begging for mercy. Was created to be an introvert with an introverted personality. I fell in love with math alone. It's not because I'm pressed, it's just because I love math, and arithmetic problems take up most of my time. ”

"When I entered junior high school, there were a few very knowledgeable people from a developed area far away, and there was a Chinese teacher with the highest level. Everyone adores him. But I don't like languages. I like two out-of-town math and science teachers. Teachers from other places like me too. These teachers often boast about science to save the country. I don't believe that science can save the country. But we cannot save our country without science, especially mathematics. And math is all about it. People discriminated against me, punched and kicked, which only made me fall in love with math even more. The boring algebraic equations filled me with happiness and became the only pleasure. ”

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

"Fermat, the great French mathematician of the seventeenth century, was the founder of Western number theory. However, ancient Chinese people have already made special contributions to number theory. Zhou Ji is the oldest classical mathematical work. There is also an earlier "Sun Tzu Sutra". Among them, there is a remainder theorem, which is the first in China. Later, it was transmitted to the West and was called Sun Tzu's theorem, which is a famous theorem in number theory. Until the Ming Dynasty, Huaxia made great contributions to mankind in terms of number theory. Zu Chongzhi in the fifth century calculated pi more than a thousand years earlier than the German Otto. ”

"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 Book of Numbers". His solution to the simultaneous equation was more than 500 years earlier than that of the great Italian mathematician Euler. Zhu Shijie, a great mathematician of the Yuan Dynasty, is the author of "Four Yuan Jade Jian". His solution of multivariate higher-order equations was more than 400 years earlier than that of the great French mathematician Bizhu. After the Ming and Qing dynasties, China lagged behind. However, the Chinese seem to be particularly endowed with mathematics. China should produce great mathematicians. Huaxia is a good hotbed of mathematics. ”

Mr. Kong said intermittently, as if he was recalling the road he had traveled in this life, and in his hard childhood, mathematics was the only pleasure.

"Once, the teacher gave us high school students a lecture on a well-known problem in number theory. He said that at the beginning, Peter the Great of Russia built Petersburg and hired a large number of great European scientists. Among them were the great Swiss mathematician Euler, and a German secondary school teacher named Goldbach, who was also a mathematician. ”

In 1742, Goldbach discovered that every large even number could be written as the sum of two prime numbers. He examined many even numbers, and they all showed that this was true. But this needs to be proven. Because it has not yet been proven, it can only be called a conjecture. He could not prove it himself, so he wrote to the famous mathematician Euler and asked him to help prove it. Until death, Euler could not prove it. Since then, this has become a difficult problem that has attracted the attention of thousands of mathematicians. For more than 200 years, many mathematicians have tried to prove this conjecture, but without success. ”

At this point, the classroom became a boiling pot of water. The young students, who were like the first flowers, chattered. The teacher also said that the queen of natural science is mathematics. The crown jewel of mathematics is number theory. The Goldbach conjecture is the crown jewel. The students' eyes widened in surprise. ”

"The teacher said, you all know even and odd numbers. We also know prime numbers and composite numbers. We taught this in the third grade of elementary school. Isn't that the easiest? No, it's the hardest one. This question is very difficult, very difficult. Anyone who can do it, it's amazing, that's amazing!"

"The classmates quarreled again. What's the big deal about this. Let's do it. We do it. They boasted about Haikou. The teacher laughed too. He said, 'Truly, I had a dream last night.' I dreamed that one of you was a classmate, and he was terrible, and he proved the Goldbach conjecture. ’”

The high school students burst out laughing. But I didn't laugh. I was also shaken by the teacher's words, but I couldn't laugh. If I laugh, some of my classmates will stare at me with white eyes. Since I entered high school, I have become more and more lonely. My classmates ignored me when they thought I was weird, dirty, and sick. They looked at me with contempt and sarcasm. I became a loner, a lonely person, talking to myself, a lonely deviant. In the sky, a lonely goose. At that time, I thought that I must be able to solve the Goldbach conjecture and pick the pearl of this number theory. ”

"The next day, classes were held again. A few hard-working students happily presented the teacher with a few answer papers. We have made it, they say, and we can prove the German conjecture. It can be proven in many ways. Nothing remarkable. Hah, ha!"

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

"We're done, we're done. We've figured it out!" shouted the classmates.

"Forget it, okay, okay, I mean, forget it, what are you doing with all this effort? I can't read your papers, I don't need to read them. Is it that easy? You want to ride your bike to the moon. "The teacher's words were harsh.

The classroom erupted in laughter. Those students who didn't hand in the papers laughed at the few who handed in the papers. They themselves laughed, and they all stamped their feet with laughter, and their stomachs burst with laughter. I wasn't the only one who didn't laugh. I have always been excluded from this qiē joy. ”

The following year, the teacher went back to Tsinghua University. He should have forgotten these two math lessons a long time ago. How could he know how deeply he was etched in my memory. Teachers tend to forget because they have many classmates, but students often remember their teachers when they were young. ”

"I was a junior in high school. I didn't go to school because I couldn't afford to pay the tuition fees, so I homeschooled myself for a semester. I didn't graduate from high school, but I applied for the exam with the same degree and was admitted to Bingcheng University of Technology. At that time, there was only a Department of Mathematics and Physics at the university. When I was in my second year of college, I had a math group, but there were only four students. By the time I was in the third year, there was a mathematics department, and there were still these four people in the department. Because of the particularly excellent results and the urgent need for the country to train talents, the four of us completed our studies ahead of schedule; moreover, we were immediately assigned jobs and received preferential treatment, which was enviable. ”

"However, not for me! In college, my life was better. There are only four college students in the same group and department, but there are four professors and one teaching assistant to guide the study. How hungry and greedy I was to drink among the flowers to make the fragrant and rich mathematical honey! How free I am to gallop through the realm of abstraction!"

Teacher Kong said as he spoke, his face was ruddy, his eyes shone brightly, and he grabbed Liu Meng and said: "Xiao Meng, Goldbach's conjecture has plagued me all my life, and it still can't be solved, you can definitely solve it, promise me, you will definitely solve her, okay?"

Liu Meng felt very sad in his heart, knowing that he was returning to the light, and said firmly: "Teacher Kong, don't worry, I will definitely solve the Goldbach conjecture, you just said that our Huaxia has always been leading the world in mathematics, but in modern times, I will definitely leave this pearl in our Huaxia." ”

"If I could do it all over again, I would still make this choice, I have been pursuing it all my life, and I have not felt lost and empty for a moment, my favorite mathematics, it's time to say goodbye. After Mr. Kong finished speaking, he left with a smile.

Liu Meng couldn't hold back and didn't cry, and said quietly: "Teacher Kong, don't worry, I will definitely solve the Goldbach conjecture for you." ”R1152