Chapter 59 Today is another day of being pressed to the ground and rubbed When Xu Qingzhou returned, the dormitory was very quiet. Xu Zhengyang and Kong Xianbo sat on the chairs, as if their souls had been drained. Zhai Ziqiang was a little better, but he had no intention of reading at this moment. squeak~ There was a sound of door opening. Xu Zhengyang's hollow eyes moved, and he stood up suddenly, personally helping Xu Qingzhou pull the chair. "Old Xu, Brother Zhou, why don't you tell me what's going on?" Kong Xianbo and Zhai Ziqiang looked over. "Song Yao and I were high school classmates." Xu Qingzhou took a sip of water. Kong Xianbo pushed his glasses and said slowly, "So, the boy who sent Song Yao to the dormitory at the beginning of the school term was you?" "Ah." "Are you two in love?" Xu Zhengyang said in a sour tone.
Xu Qingzhou shook his head: "Seal the heart and lock the love." "No, there's such a pretty girl around you, don't you have any thoughts at all?" Xu Zhengyang now really doubts whether Xu Qingzhou is gay. Kong Xianbo and the other two also didn't believe it. Xu Qingzhou patted Xu Zhengyang on the shoulder and said, "Xiao Xu, the meaning of life is not all about love. You can imagine more advanced things, such as the origin of the universe, the operation of the galaxy, and the future of mankind." The dormitory was quiet for three seconds. "Lao Xu, I used to think I was a pretentious person, but now I realize that you are the one who is really good at pretending." Xu Zhengyang's tone was somewhat emotional, and he was completely convinced. Xu Qingzhou was lying on the bed when he saw Xue Ying sending him several messages. Xue Ying: "I heard from Shen Yueqing and the others that you and Song Yao know each other?" Xu Qingzhou was lying on the bed typing: "Well, we were high school classmates." Xue Ying: "It's so lucky to have a familiar high school classmate in the same school." "Are you feeling well?" Xu Qingzhou did not continue the topic but asked in a typing voice. Xue Ying sent a weak emoji, and then a line of words popped up behind her avatar: "It's fine now, but it's a bit of a failure. It collapsed on the first day." The two chatted for a while, and Xu Qingzhou decisively ended the topic, put down his phone and went to sleep. Girls' dormitory. There was a line of small words on the phone screen: Are you in a relationship with classmate Song Yao? After hesitating for a long time, Xue Ying let out a light breath, deleted the small words on the screen, and put down the phone. During the military training, in addition to training during the day, there is also a march on the first night. It was not until Thursday night that a rain finally gave the freshmen some free time. At 8 o'clock, Xu Qingzhou changed his clothes and came to the library of the School of Mathematics with his computer and thesis manuscript paper.
The Mathematics Library is located at 1159E on the first floor of the School of Mathematics. It covers an area of about 300 square meters and is divided into four parts: reading area, book stack, reader search area, and editing and compiling work area. When Xu Qingzhou went there, there were quite a lot of people, and half of the seats were occupied. The reader retrieval area provides desktop computers, all-in-one printer, copy and scanner machines and a self-service card swiping platform to facilitate readers to search, print, copy and scan by themselves. It was about the same size as the one in the School of Physics. Xu Qingzhou walked around the library, familiarized himself with the situation, and sat down in a corner. Opposite her was a girl wearing round glasses. Seeing Xu Qingzhou sit down, the girl opposite put away her things. He nodded to express his gratitude and then took out his first paper "On the Application of Euler's Formula in Wave Function Representation". 【Abstract: This paper aims to explore the important role of Euler's formula in the representation of wave functions in quantum mechanics. Wave functions are the basic mathematical tools for describing particle states in quantum mechanics. They contain physical information such as particle position, momentum, and energy】 In university mathematics courses, Euler's formula is usually introduced in courses such as complex function theory or advanced calculus. In the teaching plan of Kyoto University, complex function theory begins to be studied in the sophomore year, while advanced calculus is a junior year course. Xu Qingzhou quickly immersed himself in the translation and the progress was pretty good, especially since he wrote many parts directly in English. So after just one hour, he had finished one-fifth of the work. "Huh~" Xu Qingzhou exhaled and rubbed his temple. At this moment, a pen was stretched out and poked Xu Qingzhou's arm. He looked over along the direction of his hand and saw that the girl opposite him was a little embarrassed and whispered: "Classmate, if you have time, can you help me with a math problem?" Yan Sishu had no choice. She had been working on this question for two hours. She originally wanted to ask the professor who often came to the library, but he had not come yet. Xu Qingzhou nodded, "Bring it here." Yan Sishu quickly handed over the manuscript in his hand. In three-dimensional non-Euclidean geometry, consider a surface Σ defined by the following parametric equations: ( x = u \cos(v + u^2))( y = u \sin(v + u^2))( z =\ln(1 + u^2)) Suppose any point on the tangent plane π is ( Q(x, y, 0)) (since the tangent plane is parallel to the xOy plane, the z coordinate is 0), find the shortest distance ( d(P, Q)) from point ( Q ) to point ( P(1, \frac{\pi}{4}, \ln 2)) on the surface Σ. Xu Qingzhou took a look and saw that it was a problem about differential geometry and manifolds. Two solutions quickly popped into his mind. So, I took a pen and wrote down the solution. The first one can be obtained by calculating the intersection of the normal line of the surface Σ at point (P) and the tangent plane π. The second one requires the use of variational methods or the gradient of the distance function (d(P, Q)) to solve the shortest distance. After about 2 minutes, Xu Qingzhou finished and handed the fully written manuscript paper to the girl. "So fast." Yan Sishu took the manuscript paper in surprise, looked at the answer on it, and was stunned for a moment. Not only did he solve it, but there were even two solutions? Is this the legendary academic master who is blessed by God? It's another day of being pinned to the ground and rubbed. "Thank you, senior." "It's just right to relax my brain." Xu Qingzhou smiled and shook his head. Yan Sishu: “.” The things that make you feel uncomfortable all day are just tools for others to relax. Xu Qingzhou originally wanted to explain that he was a freshman, but the girl opposite him had already lowered her head and started writing quickly, so he had to give up. At 9: in the evening, the number of people in the library increased instead of decreased, and there were only about ten seats left. After another 10 minutes, even the seat next to Xu Qingzhou was occupied by a fat old man.
Yan Sishu greeted the fat old man next to Xu Qingzhou in a low voice: "Professor Gu." Because they were in the library, the fat old man didn't say anything, but just nodded slightly, put on his glasses, took out the bookmark, and continued to read the book called "Mathematical Thought from Ancient to Modern Times" which was only included in the library of the School of Mathematics. Xu Qingzhou's attention was still on the paper and he was immersed in the translation. After an unknown amount of time, the old professor's voice suddenly rang in his ears. "Student, can I take a look at your paper?" (End of this chapter)