Chapter 59: Today is another day of being rubbed on the ground

When Xu Xu Qingzhou returned, the dorm was very quiet.

Xu Xu Zhengyang and Kong Kong Xianbo sat on their chairs as if their souls had been drained. Zhai Zhai Ziqiang was slightly better, but he was also in no mood to read at this time.

Creak~ the sound of the door pushing opened.

Xu Xu Zhengyang's empty eyeballs moved, and he stood up abruptly, personally pulling the chair for Xu Xu Qingzhou, "Old Xu... no, Brother Zhou, can you tell me what's going on?"

Kong Kong Xianbo and Zhai Zhai Ziqiang looked over.

"Song Yao and I are high school classmates." Xu Xu Qingzhou drank some water.

Kong Kong Xianbo pushed his glasses and said slowly: "So... the boy who dropped off Song Yao at the dorm when school started was you?"

Girls' dorm.

Read! {

Xue Ying sent a weak emoji, and then a line of text jumped out behind the avatar: "Already better, just a bit of a failure, collapsed on the first day."

Another 10 minutes passed, and even the seat next to Xu Xu Qingzhou was occupied by a fat old man.

About 2 minutes, Xu Xu Qingzhou finished and handed the full manuscript paper to the girl.

The Mathematics Library is located at 1159e on the first floor of the School of Mathematics, with a library area of about 300 square meters, divided into four parts: reading area, book storage, reader retrieval area, and acquisition and cataloging work area.

"So fast..." Yan Yan Sishu took the manuscript paper in surprise, looked at the answers on it, and was stunned for a moment. Not only was it solved, but there were two ways?

Xu Xu Qingzhou lay on the bed and typed: "Yeah, we are high school classmates."

Xu Xu Zhengyang's tone was a bit emotional, completely convinced.

Xu Xu Qingzhou patted Xu Xu Zhengyang on the shoulder: "Little Xu, the meaning of life is not all in love. You can imagine higher things, the origin of the universe, the operation of the galaxy, the future of humanity..."

Yan Yan Sishu hurriedly handed over the manuscript paper.

Opposite was a girl with round glasses.

This is the legendary top student who is fed by God... another day of being rubbed on the ground.

The first method can be obtained by calculating the intersection of the normal line of the surface o at point (p) and the tangent plane π. The second method requires using the gradient of the variational method or the distance function (d(p, q)) to solve the shortest distance.

Yan Yan Sishu: "."

Until Thursday night, a rain finally made the freshmen free. At 8:00, Xu Xu Qingzhou changed his clothes, held his computer and paper manuscript, and came to the Mathematics Library.

Yan Yan Sishu had no choice. She had been stuck on this problem for two hours. She originally wanted to ask the professor who often came to the library, but the other party hadn't come yet today.

Something that troubled her for a day was just a tool for others to relax. Xu Xu Qingzhou originally wanted to explain that he was a freshman, but the girl opposite had already lowered her head and started writing quickly, so he could only give up first.

In college mathematics courses, Euler's formula is usually introduced in courses such as complex function theory or advanced calculus. In Peking University's teaching plan, complex functions are learned in the sophomore year, and advanced calculus is a junior course.

Kong Kong Xianbo and the other two also didn't quite believe it.

During the military training time, in addition to daytime training, there was still training at night on the first day.

Xu Xu Zhengyang now really doubted whether Xu Xu Qingzhou was bent.

"Yeah."

!.

Xu Xu Qingzhou quickly sank into the translation. The progress was okay, especially since he wrote in English in many places, so he finished one-fifth in just 1 hour. So, he took a pen and wrote down the solution.

Xu Xu Qingzhou nodded, "Bring it over."

He looked along his hand and saw the girl opposite was a bit embarrassed, saying in a low voice: "Classmate, if you have time, can I ask you a math problem?"

Xue Ying: "I heard from Shen Shen Yueqing and the others that you and Song Yao know each other?"

"Are you two dating?" Xu Xu Zhengyang's tone was very sour.

【Abstract: This paper aims to explore the important role of Euler's formula in the representation of wave functions in quantum mechanics. The wave function is a basic mathematical tool in quantum mechanics to describe the state of particles, and it contains physical information such as particle position, momentum, and energy】

Xu Xu Qingzhou took a look. It was a problem of differential geometry and manifolds. Soon, two solutions popped into his mind.

"Thank you, senior."

The dorm was silent for three seconds.

Seeing Xu Xu Qingzhou sit down, the girl opposite collected her things. He nodded to express gratitude, then took out the first paper, "On the Application of Euler's Formula in Wave Function Representation."

Xu Xu Qingzhou lay on the bed and saw Xue Ying send him a few messages.

"Hoo~" Xu Xu Qingzhou exhaled and rubbed his temples.

At 9:30 PM, the number of people in the library increased instead of decreasing, leaving only a dozen seats.

"Are you okay?" Xu Xu Qingzhou didn't continue this topic, but typed and asked.

On the phone screen was a line of small text: Are you dating Song Yao? After hesitating for a long time, Xue Ying exhaled gently, deleted the small text on the screen, and put down the phone.

"Old Xu, I always thought I was very pretentious, but now I find that you are the king of pretense."

When Xu Xu Qingzhou went, there were still quite a few people, and half of the seats were occupied.

Xue Ying: "It's so happy to have a familiar high school classmate in one school."

"Just relax the brain." Xu Xu Qingzhou shook his head with a smile.

The two chatted a few words, Xu Xu Qingzhou decisively ended the topic, put down the phone, and went to sleep.

Also at this time, a signature pen stretched over and poked Xu Xu Qingzhou's arm.

"No, with such a pretty girl by your side, don't you have any thoughts at all?"

Xu Xu Qingzhou shook his head: "Seal the heart and lock the love."

In a three-dimensional non-Euclidean geometric space, consider a surface o, defined by the following parametric equations: (x=u\cos(v+u^2)) (y=u\sin(v+u^2)) (z=\ln(1+u^2)) Let any point on the tangent plane π be (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 surface o.

The reader retrieval area provides desktop computers, printing, copying, and scanning all-in-one machines, and self-service card swiping platforms, facilitating readers to self-query, print, copy, and scan.

The size is about the same as the School of Physics. Xu Xu Qingzhou strolled around the library, familiarized himself with the situation, and sat in a corner seat.

Yan Yan Sishu whispered to the fat old man beside Xu Xu Qingzhou: "Professor Gu."

Because it was in the library, the fat old man didn't speak, just nodded slightly, put on his glasses, took out a bookmark, and continued to read that book only collected by the Mathematics Library, called "Mathematical Thought from Ancient to Modern Times."

Xu Xu Qingzhou's attention was still on the paper, immersed in translation. I don't know how long it had passed, when the old professor's voice suddenly sounded in his ear.

"Classmate, can I take a look at your paper?"

(End of chapter) ===== CHAPTER 60 =====