Chapter 10

In the evening at six o'clock, the sunlight wasn't so scorching, shining on the body, warm and very comfortable.

At this time, several nearby streets hadn't been renovated yet. Walking on the road made people feel crowded and warm.

Xu Qingzhou's footsteps were light, finding the district library according to the route in his memory.

He flipped through the natural science area for a few minutes and found Gilbert Strang's "Introduction to Linear Algebra". He was familiar with this one and took it out purely for nostalgia, as well as Gauss's work on differential geometry, "General Research on Curved Surfaces".

Halmos's "Naive Set Theory".

The first two were Chinese versions, and the latter was an English original.

His mathematics was quite strong, but it was limited to individual fields, such as mathematical physics equations related to quantum mechanics, linear algebra, complex variable functions, etc., and he hadn't systematically come into contact with research in higher mathematics.

Sure enough, there were fewer people on the second floor, but there weren't many seats either. The most important thing was that there were two people beeping, as if no one else was around.

Read! {

Whoa~ met again.

At ten o'clock in the evening, Xu Qingzhou closed the book and looked at Song Yao opposite, "I'm leaving."

He wrote very carefully, writing out every step.

Walking toward the window seat, Xu Qingzhou was a bit surprised when he saw the figure by the window.

"Lend me your draft book."

Yes, after several hours of thinking, Xu Qingzhou was really a bit hungry.

Song Yao pursed her lips, suppressing the small resentment in her heart, and also seriously threw herself into the ocean of mathematics.

Don't know how much time passed, Xu Qingzhou felt someone poke his arm.

When he came back as a freshman, there were pits everywhere, just like the Syrian battlefield.

【We know from the meaning of the question that the function x - y ≥ 2(x - y), 1, when x - y = 0...】

【Function y = f(x) defined on R, if for any unequal real numbers x, y satisfying (f(x) - f(y)) / (x - y) < 0 and x, y satisfying the inequality f(x - 2x) + f(2y - y) ≤ 0, the image of function y = f(x - 1)...] Function analysis questions were indeed difficult for high school.

He was so cold, colder than her.

By the window, the girl had exquisite features, a straight nose, full red lips, crystal-clear eyes under thick eyebrows, exquisite collarbones, and exposed skin that was smooth and delicate. Her soft long hair was draped over her shoulders. The cross-breeze blew, lifting a few strands of fine hair in front of the girl's forehead.

Song Yao suddenly found the Xu Qingzhou in front of her very strange. Following Xu Qingzhou for a while, she asked: "I don't understand one thing... With your strength, you can completely achieve both fame and fortune. Why have you been suppressing your scores and being an unknown person?"

Xu Qingzhou took the test paper.

After reading it, Song Yao was hit.

Song Yao graduated with an undergraduate degree and heard that she went abroad to study. After that, there was no news, and she didn't even participate in class reunions. Many classmates regretted not seeing the beautiful Song school flower again.

If he remembered correctly, the residential area on the left would be demolished next year, and the others would also be renovated in the next few years.

!.

She went home and changed into a white dress, pure and lovely, but there was a cold temperament that kept people at a distance.

Opposite, stumped by question 16 of the fill-in-the-blanks, Song Yao planned to relax for a while and started secretly observing Xu Qingzhou.

Two minutes later.

Looking up, she saw Song Yao looking at herself and asked in a low voice: "Xu Qingzhou, can you do this question?"

Xu Qingzhou got up, put the three books back in their original places, and only then realized that Song Yao was actually waiting for him nearby.

However, he thought of a more serious problem. "There are three types of people in the world: ordinary people, geniuses, and one more type—gods. As for me, I belong to the last one. In order not to overshadow the brilliance of you ordinary geniuses, I choose to hide myself."

She hung her head, her pen tip tapping lightly, her brows slightly furrowed.

He was fascinated. The book on the right, "Introduction to Linear Algebra"? The other one, an English book, didn't recognize it... Is Xu Qingzhou following me? But he was indeed taking notes.

"Okay."

For him, mathematics was just a tool, not the main research direction. It wasn't until he encountered a large number of calculation problems in his research and his calculation ability was stretched that he sought help from mathematicians, and only then did he feel that physics could not be separated from mathematics.

Having just changed clothes, his pockets were cleaner than his face.

Seeming to notice someone looking at him, Song Yao looked up. The moment she met Xu Qingzhou's gaze, a flash of astonishment slid through her eyes, but it quickly faded.

Xu Qingzhou handed the draft book to Song Yao.

Song Yao was so angry her teeth hurt. What ordinary person? She was also very powerful, okay! She wanted to refute, but found that Xu Qingzhou's attention had long since gone to a rice noodle shop next to him.

Linear algebra, heard Old Liao mention it—this is knowledge learned in university, and Xu Qingzhou is reading it now? Song Yao's brain was full of question marks. What to do? Curious, want to ask.

Time passed minute by minute.

The evening sunlight, through the reflection of the glass, spilled on the edge of the desk, and the entire reading room was nurtured in golden light. Song Yao was still struggling with the math problem.

When did Xu Qingzhou become so good at math? She looked at Xu Qingzhou suspiciously, but found that he had already lowered his head to read.

The library borrowing procedure was very troublesome now, and he had a lot of materials to find. It was troublesome to borrow them back and forth. Anyway, it was only a ten-minute walk from here, so it was better to read them directly here. The two came out of the library.

"I'm familiar with high school content, so I'm reading some extracurricular knowledge to increase my knowledge." Xu Qingzhou was familiarizing himself with the old streets around him.

He looked at Song Yao and sincerely invited her: "Do you want to eat some rice noodles? My treat."

"Xu Qingzhou, the college entrance exam is coming soon, aren't you reviewing?" Song Yao still asked her long-standing doubt.

Third floor, finally a bit better.

Song Yao was very quiet, doing math test papers.

But seeing Xu Qingzhou was very serious, she gave up.

The first-floor self-study room was full, Xu Qingzhou held three books and went to the second floor.

Xu Qingzhou nodded to greet her and sat down opposite her. No empty seats around? There were, but being able to look at a beauty in his spare time was better than smiling at an old brother.

In her perception, Xu Qingzhou's math was average, but seeing the books he read, she changed her view again.

"Hmm, I'm leaving too." Song Yao looked at her phone and started packing her things.

At this point in time, the sharing economy hadn't risen, let alone the popular shared self-study rooms, so there were generally not many seats left in the library self-study room on holidays.

He and Song Yao were really destined.

Putting away his emotions, he opened "Naive Set Theory" in front of him and read it seriously.

Sitting opposite her, Xu Qingzhou could even smell a faint fragrance.

"I'll treat you instead, thank you for explaining the problem to me." Song Yao shook her head.

"Okay." Xu Qingzhou agreed readily and strode toward the shop, "This shop's taste is very authentic. In a few years, maybe they can open branches."

He remembered that this residential area was demolished, and the boss really opened four or five chain stores. He had been to one of them, and the taste wasn't great.

Song Yao was stunned on the spot, suddenly having an illusion of being set up.

(End of chapter)