Chapter 59 Today is another day of being pressed to the ground and rubbed
When Xu Qingzhou went back, the dormitory was very quiet.
Xu Zhengyang and Kong Xianbo were sitting on chairs, as if their souls had been drained. Zhai Ziqiang was a little better, but he had no intention of reading at this time.
Squeak~
The sound of pushing the door sounded.
Xu Zhengyang's empty eyes moved, and he stood up quickly and personally helped Xu Qingzhou pull up 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 are high school classmates." Xu Qingzhou took a sip of water.
Kong Xianbo pushed up his glasses and said slowly: "So, you are the boy who sent Song Yao to the dormitory at the beginning of school?"
"Um."
"Are you two in a relationship?" Xu Zhengyang's tone was sour.
Xu Qingzhou shook his head: "Seal your heart and lock your love."
"No, with such a good-looking girl beside you, don't you have any ideas at all?"
Xu Zhengyang now really doubts whether Xu Qingzhou is a crook.
Both Kong Xianbo and Kong Xianbo didn’t believe it.
Xu Qingzhou patted Xu Zhengyang on the shoulder: "Xiao Xu, the meaning of life is not all about romance. You can imagine more advanced things, the origin of the universe, the operation of the galaxy, and the future of mankind."
The dormitory was quiet for three seconds.
"Old Xu, I always thought I was pretending, but now I realize that you are the king of persuasion."
Xu Zhengyang's tone was somewhat emotional, and he was completely convinced.
Xu Qingzhou was lying on the bed and saw Xue Ying sending several messages to him.
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 are high school classmates."
Xue Ying: "It's so happy to have a familiar high school classmate in the same school."
"Are you feeling well?" Xu Qingzhou did not continue the topic, but typed a question.
Xue Ying posted a weak emoticon, and then a line of words popped up behind the avatar: "It's better, but it was a bit of a failure. It collapsed on the first day."
After chatting for a few days, Xu Qingzhou decisively ended the topic, put down his phone and went to sleep.
Girls dormitory.
On the screen of the mobile phone was a line of small words: Are you and classmate Song Yao in a relationship?
After hesitating for a long time, Xue Ying let out a breath, deleted the small words on the screen, and put down her phone.
During military training, in addition to training during the day, there is still training on the first night.
It wasn't 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 Mathematical College of Science and Technology with his computer and paper in hand.
The Mathematics Library is located at 1159E on the first floor of the School of Mathematics. The library covers an area of about 300 square meters and is divided into four parts: the reading area, the library, the reader search area, and the editing work area.
When Xu Qingzhou went there, there were quite a lot of people, half of the seats were occupied.
The reader search area provides desktop computers, all-in-one printing, copying and scanning machines and a self-service card swiping platform to facilitate readers' self-service inquiry, printing, copying and scanning.
The size is similar to that of the School of Physics. Xu Qingzhou walked around the library to familiarize himself with the situation and sat down in the corner.
Opposite is a girl with round glasses.
Seeing Xu Qingzhou sitting down and the girl opposite collecting her things, he nodded to express his thanks and then took out his first paper "On the Application of Euler's Formula in the Representation of Wave Functions".
[Abstract: This article aims to explore the important role of Euler’s formula in the representation of quantum mechanical wave functions. The wave function is the basic mathematical tool in quantum mechanics to describe the state of particles. It contains physical information such as particle position, momentum, and energy]
In college mathematics courses, Euler's formula is usually introduced in courses such as theory of functions of complex variables or advanced calculus. In Peking University's teaching plan, learning of complex functions begins in the sophomore year, and advanced calculus is a course in the junior year.
Xu Qingzhou quickly immersed himself in the translation, looking at the words, and when he encountered words that were difficult to understand in translation, he directly entered the library database to check the relevant content.
However, the process was still a bit slow. An hour later, he had only advanced less than one-tenth.
"Huh~" Xu Qingzhou breathed out and rubbed his temples.
At this moment, a signature pen reached over and poked Xu Qingzhou's arm.
He looked over his hand and saw that the girl opposite was a little embarrassed and whispered: "Classmate, if you are free, can you ask me a math question?"
Yan Sishu couldn't help it. She had been reading this question for two hours. She originally wanted to ask the professor who often went to the library, but he didn't come until today.
Xu Qingzhou nodded, "Then come over."
Yan Sishu quickly handed over the manuscript paper in his hand.
In a three-dimensional non-Euclidean geometric space, consider a surface Σ defined by a parametric equation as follows: (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},\ln2)) on the surface Σ.
Xu Qingzhou glanced at it and saw that it was a question about differential geometry and manifolds, and two solutions quickly popped into his mind.
So, I took a pen and wrote out the solution.
The first one can be obtained by calculating the intersection of the normal line of the surface Σ at the point (P) and the tangent plane π. The second one requires the use of the variation method or the gradient of the distance function (d(P, Q)). to find the shortest distance.
In about 2 minutes, Xu Qingzhou finished it and handed the full paper to the girl.
"So fast?" Yan Sishu took the manuscript paper in surprise, looked at the answers on the manuscript paper, and was stunned for a moment. Not only did he solve it, but there were even two kinds?
Is this the legendary top student who is rewarded by God? Another day of being pressed to the ground and rubbed.
"Thank you, senior."
"Just relax your brain." Xu Qingzhou smiled and shook his head.
Yan Sishu: "."
The things that embarrassed me all day are just tools for others to relax
Xu Qingzhou originally wanted to explain that he was a freshman, but the girl opposite had already lowered his head and started writing, so he had to give up first.
At 9:30 p.m., the number of people in the library increased instead of decreasing, with only about a dozen seats left.
After another 10 minutes, even the seat next to Xu Qingzhou was occupied by a fat old man.
Yan Sishu whispered to the fat old man next to Xu Qingzhou: "Professor Gu."
Because he was in the library, the fat old man didn't say anything. He just nodded slightly, put on his glasses, took out his bookmark, and continued to read the book called "Mathematical Thought from Ancient to Modern Times" that was only included in the library of the Institute of Mathematics.
Xu Qingzhou's attention was still on the paper, immersed in the translation. After an unknown period of time, the old professor's voice suddenly sounded in his ears.
"Classmate, can I see this paper of yours?"
(End of chapter)