? Two sketches of people
? Yang yingrui
(1) Zhang Ju master.
? Mr Liu is a professor at Peking University Institute of Mathematics. He is two years younger than me. He is the only person I call a master. Zhang Ju was a graduate student in the Department of Mathematics in Peking University in the early 1980s. Both her master's degree and doctor's degree were read by Qian Min. Zhang Ju has a first-class academic background and profound knowledge. He has been practicing differential geometry and mathematical physics.
? At that time, the 29th floor of Peking University was a male postgraduate dormitory. There are two daily activities in this building: playing table tennis and playing Go. I was working in China Academy of Social Sciences. I have no job. I live in Yannan Garden, separated from the 29th floor by a wall. I used to go every afternoon, either playing table tennis or playing Go. In my impression, I am definitely the worst at table tennis there. I often dominated the game, and later forced everyone to play doubles. Many years later, I found that everyone's memory is different from mine. For example, in the memories of Liu, Wei Liu, Chen Shiyi, it seems that their skills are almost the same as mine, and they all speak in a dissatisfied tone. I, Yang Yingrui, am a doctor of psychology, and I understand the principle of selective memory. Once Zhang Ju mentioned that he was originally trained by Dongcheng District Sports School, and I immediately said that I was from Shichahai Sports School. Shichahai Sports School is a city sports school and crushed him. I changed my ping-pong bat when I was 10 years old. Japanese small steel plate, 18 sponge rubber particles, has good ball holding performance and was matched in the 1960s. Because it is so old and the beat is so old, people on the 29th floor call me Old Revolution, or "Brother" for short, and I am famous.
? But I can't play go. There are many Go masters among the graduate students in the Department of Mathematics of Peking University, such as Jia Chaohua (a master of mathematical number theory) and Zhang Naiwu (who regretted playing chess seriously and later became the vice minister of science and technology). Because I am often besieged by many experts when I play Go, Zhang Ju often stands up and helps me stand on the stage. From then on, I began to call Zhang Ju "master".
? People on the 29th floor have made great achievements, such as Liu Wei and Chen Shiyi becoming principals, and others, such as celebrities Tian Gang and Zhang, have also become vice presidents, deans and directors of the center. The worst part of my campus life is my master's degree. After graduation, Dr. Zhang Ju stayed in school and went to the United States as a visiting scholar. After returning home, the posts of cadres were divided. Classmate Zhang Jiping (disciple of Duan Xuefu, the old dean) was then the dean of the School of Mathematics; He told Zhang Ju that the only thing left is the chairman of the trade union, so why don't you do it? Zhang Ju asked, what does a trade union chairman do? Ji Ping said that there are two main things: organizing a table tennis competition and a Go competition in the college every year, and then leading the faculty to participate in the inter-departmental competition in the school. So the master became the chairman of the college trade union. The chairman of the trade union of Peking University has a departmental standard, so the master became the person who had a telephone at home earlier in Peking University. Everything the master has done has made great achievements. The table tennis room of Peking University Institute of Mathematics has lasted for decades. Every day, old people and new people call and dial the phone, and they also have their own scoring methods without scoring. Zhang Ju is the boss there. Doing math is brain-intensive, and playing table tennis is definitely a good medicine to relieve stress.
? Once I went back to the School of Mathematics of Beijing Normal University to attend a class reunion, and I met my classmate who was the secretary of the Party Committee at that time. He talked about how strong the School of Mathematics of Beijing Normal University was. I joked that no matter how strong our college is, it can't beat others' Peking University School of Mathematics. However, I, Yang Yingrui, play table tennis in the table tennis room. The boy's work emboldened him and gave the courtyard a prestige.
? On the 29th floor, once the master played Weiqi, he happened to let his tutor, Mr. Qian Min, meet him with something. In the discussion class the next day, Zhang Ju learned it correctly. Mr. Qian said, Liu, you are a gifted scholar! In fact, the master didn't understand the teacher's respect, and replied: Qingqing (a classmate is also a master of Weiqi) is a talented person in Jiangnan, and I am diligent. Qian Lao took the lead: study hard and you won't study hard.
? Masters are generally low-key. Once, forgetting the context, the master mentioned that his kindergarten was in Zhongnanhai. I asked, who is your adult and who works in Zhongnanhai? I haven't heard you say it, and I can't tell. Master wriggled, but it also seemed a bit modest and mysterious. He clicked on a file on the computer, which was an article in People's Daily in the 1950s. The title is impressive: how bold people are and how productive the land is. The master pointed to the author's name and said, this is my father. He is in the central office and is under orders. Later, I sometimes tell my master about my current research interests and topics; The master said that the topic you are doing now is getting bigger and bigger. I joked that this is not the true biography I learned directly from the emperor.
? Because I have studied economic mechanics and psychological mechanics for more than ten years, I need to learn gauge field theory and fiber bundle theory. A few years ago, I talked to my master. He said that this is his housekeeping knowledge, and this is the field he has been teaching. Since then, I often ask my host for advice, and sometimes I call from America at night to ask questions. The master patiently solved my doubts, not because of friendship, but also because there are other secrets. At that time, it was agreed that table tennis would win two games in three games and lose one game. Master won Baojiao and lost to Bao Hui. The result was two to one, and I narrowly won the third game by two points. I told the spectators at that time that it was like a complex in a novel. Every time Liu Molin plays Weiqi with the emperor, he can't lose, but he only dares to win half a game.
(2) Treat China humorously.
? Mr. Jia Chaohua is a researcher at the Institute of Mathematics of China Academy of Sciences, specializing in analytic number theory. In his early years, he studied under Mr. Pan Chengbiao from Peking University. Doing number theory all the way belongs to Tai Chi, paying attention to standing on piles every day, meditating and chanting Buddha, and cooking people's kung fu. Chaohua was neatly and handsomely written at that time, and how many pages of mathematical derivation were neatly and meticulously written. It seems that the work of number theory is designed for Sri Lankans. It is said that the key to sketch is to grasp the characteristics of the characters. Morning flowers should be characterized by humor. With this in mind, the following materials immediately come to mind.
? Jia Chaohua is Zhang's brother, and both of them began to learn number theory with Pan Chengbiao, a teacher from Peking University. After Zhang became famous a few years ago, I once asked Chaohua whether to invite Zhang to the next class reunion. Chaohua said that he is a celebrity now, but not anymore. This is called pride, or it may be a problem of doing number theory in the institute for a long time.
? Yang Yingrui has another style, but he is not proud. Taking photos with real academic celebrities is a kind of spiritual purification and academic feelings. Why not do it once in a while? Every time after class, the students scrambled to take a photo with me, lined up with notebooks and asked me to sign a message, saying that Mr. Yang's Nobel Prize in Economics was worth showing off. I think this is a very healthy attitude. Therefore, I always sign the students' notebooks in class, and I always leave messages to show my respect and continue my education. This impressed me deeply, and I felt that my class was really shocking and moving, which also showed that young students had a good eye. In this way, I prefer to lecture and enjoy it. Being excited as soon as you enter the classroom means having the desire to conquer students' hearts and the impulse to pour out their hearts. After the big class, all diseases will be eliminated! As a teacher, there are no other benefits, only this three-foot platform is my own acre of land, and the praise of students is my greatest gain.
? When Jia Chaohua was a graduate student, he played a Go game in the Department of Mathematics of Peking University and the Institute of Mathematics of the Academy of Sciences. Chao's chess game was held in his dormitory on the 29th floor. The other party is a researcher at the Institute of Mathematics. Halfway through the game, Chao stared at a chess piece in the corner and had an exam for more than 20 minutes. People who look from the side can see clearly that there is no loophole in that corner, and they don't know what to stare at. Later, I explained to Walter that he was not good at playing chess at all. He stared at the chess pieces so hard that he wanted to confuse the other side and mistakenly thought that he needed to make up a game. Finally, the opponent really made up the waste chess, and Jia Chaohua lost.
? Chaohua was once an academic star of the Academy of Sciences. At that time, he was the director of the five disciplines research office of the Institute of Mathematics where Chen Jingrun and Wang Yuan were located (one * * * five people), and he was also elected as a member of the Beijing Youth Federation and a group of literary and sports stars. It is said that Zhou Dean Zhao Guang also sent him tea or other things to show his concern and encouragement, which made him feel warm in China. No matter how tall a person is, it seems that encouraging care is warm.
? Chaohua went to Boya Xiyuan to find me for the first time. I went by bike and knocked on the door and went upstairs without any guidance. I was a little surprised when I opened the door. He said that the old Beijingers are old, and it is not a problem to find a place to solve them. My family talked about economic mechanics and theoretical physics in the black edition, and analytic number theory and Riemann conjecture in China. It wasn't a real academic discussion. Everyone listened. However, it was the most exciting and joyful scene. Only people who really know and trust can enter this realm, have their own research secrets, have their own proud research path, and have mutual appreciation and understanding, such as academic girlfriends confiding academic secrets.
? In the early 1980s, the food in domestic canteens was not good. 1986 Before going abroad, Chao and I collected more than 20 kilograms of food stamps and changed them into money. At that time, he ate half a roast duck at Quanjude branch on the second floor of the Long March canteen across the street from the southwest gate of Peking University (Peking University students call it "Snow Seven", and Peking University has six student canteens). During the dinner, he also gave me an exquisite photo album with a handsome signature on the title page (see annex). After eating half a roast duck, both of them felt indebted and gluttonous. Just then, I saw Mr. Ding, then president of Peking University, and all the people coming out of the private room. The food is full and calm, so it is not enviable. Chao whispered to me, it seems that I have to work hard as a principal in the future.
(3) Postscript
? I find that the style of essays is similar to that of sketching. Learning, like drawing, actually requires a basic knowledge of sketching. For different disciplines, if you understand their characteristics with your heart and sketch for the bottom, you will not have the knowledge to fight when you need hours. Interdisciplinary research in the 20th century is about cooperation between people in different fields. The comprehensive science of 2 1 century requires a person to enter different fields. Have you seen Jin Yong's legend of the condor hero? Yang Yingrui is the real version of Zhou. Learn from each other's strengths, it is good for everyone, learn from each other's strengths.
? In addition, at that time, the logic room of the Institute of Philosophy wanted to develop mathematical logic and decided to recruit people directly from the Department of Mathematics, regardless of the original research direction. Mr. Zhou Liquan, the director of the office, and Mr. Zhang Shangshui, the deputy director, specifically asked me to explain the task and gave me three places full responsibility. At that time, I specially talked to Mr. Deng Dongguang, then the head of the Department of Mathematics at Peking University, and pointed out three master students I was most familiar with, Jia Chaohua, Liu, and Liu. Teacher Deng said that you can really choose; Our department is also studying the recruitment of doctoral students. All three students are default candidates. So, I had to recruit a master's degree in computer science and a master's degree in Hu Shihua, Institute of Computing Technology, Academy of Sciences, which is also a job with a mission. I didn't tell Zhang Ju or anyone else about it. Friends are friends, and work is work. We know the rules and obey the discipline.
(draft 2018-1-14, revised 202 1-3- 19)