Time passed quickly, in the blink of an eye, more than three hours passed, and the questions on the notebook were all finished by Zhou Hai.

Picking up the thermos cup on the table and taking a sip of tea to moisten his throat, Zhou Hai looked at Xu Chuan and said, "That's all, just digest it well after you go back." ”

Then he added: "Your kid's talent in mathematics is really the highest of all the students I have ever met, and his sensitivity to the core of knowledge is terrifying. ”

"These questions on your notebook are basically the core points of the line generation, and if you master these, you will master about one-third of the line generation in college or even graduate school."

Zhou Hai sighed a little, just now he watched Xu Chuan sort out his thoughts and solve problems throughout the whole process, and this contact really touched him a lot.

It is worthy of being a super student with a full score in the college entrance examination + IMO and IPHO double gold medals, and his talent is ridiculously high.

In mathematics, he has his own core learning ideas and understanding, and sometimes he can expand the boundaries of the problem with him when he asks a question.

He has never seen such a talent after teaching for so many years.

"Teacher, tell me about this problem again, after the calculation of the domain value of number theory is completed, I don't understand too much about how to transform it into domain expansion."

On the side, after listening to these questions together, Cai Peng leaned over and pointed to the last question and asked Professor Zhou Hai with a shy smile.

Zhou Hai looked at his student angrily, and he felt a little ashamed.

A freshman in his first year of college understood the topic after he spoke it once, and a graduate student who was writing his graduation thesis didn't understand it.

I'm embarrassed to say it.

But he didn't refuse, the student asked the teacher, and the teacher had the responsibility to answer, that is, when a student in a big class found him, he had the responsibility to explain the topic clearly so that the student could understand, not to mention the student he brought himself.

Just as he was about to talk about it again, his eyes fell on Xu Chuan on the side, and he remembered another thing.

"Xu Chuan, you can explain this question to your senior brother, and I'll see how you learn."

As soon as the words changed, Zhou Hai said to Xu Chuan.

"Forehead ......"

Xu Chuan was a little confused, why did it get involved with him.

"Big guy, I'm in trouble!"

Cai Peng didn't think about it so much, and came directly to Xu Chuan.

In his opinion, the master is the teacher, and the person who can prove the world-class conjecture problem is not at the same level as him for a long time.

As for age and age, what is it?

Engaging in learning, how can there be so much exquisiteness, Tao Zhexuan's students are older than him, don't take it the same.

"Okay, then I'll talk about my understanding of this topic."

Xu Chuan didn't get entangled, pulled a blank manuscript paper on the desk, and wrote the calculation process and ideas while explaining.

"The core of this problem lies in the distortion transformation of Hilbert's space, which needs to be constructed as a linear norm space, and then decomposed by using the picocal integral and Cauchy-Schoise inequality to ......."

It's not difficult for him, and it can even be said to be something that comes easily.

After all, his more than ten years of teaching at Princeton in his previous life were not in vain, and he already had his own understanding of how to explain a knowledge point to students thoroughly.

Although he has only just learned and accepted this knowledge point for a short time, this does not prevent him from understanding it thoroughly and transforming it into his own.

After a while, he explained the core of the last question.

"Understood, big guy bull batch! It's a big guy! ”

After finally figuring out the core idea, Cai Peng excitedly blew a rainbow fart, only to be glared at by Zhou Hai, who was listening on the side.

I'm so tired, I'm afraid this student can't ask for it.

It was Xu Chuan's explanation that surprised him very much.

Just now he asked Xu Chuan to explain the problem and also had the idea of exercising him, but he really didn't think that Xu Chuan could do this.

Not only is it a quick understanding of the core of the topic and a transformation into one's own knowledge, but there is almost no jerkiness, frustration, and improper use of words when explaining.

In this case, let alone a college student giving a lecture to a graduate student, even an ordinary lecturer could not do it during the first period of his tenure.

It is also normal for the average teacher to use incoherent words, stammering and forgetting words or something during the period when he first took up his or her duties, and only teachers who have been in the classroom for many years and teach students can do this kind of smooth explanation, without a word of nonsense.

And Xu Chuan gave him the feeling that he was like a teacher who taught all year round.

"Have you ever taught someone before? Or did you work part-time as a tutor? Zhou Hai asked curiously.

"Nope." Xu Chuan shook his head and replied.

"Then you explain these knowledge points so smoothly?"

"I also have a younger sister at home, who used to tutor her in mathematics and physics when she was in high school, and often explained some knowledge points to her classmates in high school, maybe that's how she exercised." Xu Chuan explained with a smile.

"I see, but it's okay, so I don't have to worry about next year's math meeting, and I'm going to give you some pointers before." Zhou Hai suddenly understood and said with a smile.

It was Xu Chuan, who was a little puzzled at this time, and asked suspiciously: "Mathematics?" What math will be? ”

"Oh, it's an invitation from Princeton yesterday, I forgot to tell you, in February next year, there is an international mathematical research exchange conference in Princeton, and an invitation letter is mailed over there, inviting you to give an academic report on the proof process of the weakened form of Weyl_Berry conjecture."

Zhou Hai patted his head, got up and took out an invitation from the drawer, and handed it to Xu Chuan.

"This should have been given to you personally by Dean Rong of our Academy, but he was on a business trip yesterday, so the invitation fell to me, and now it's for you."

On the side, Cai Peng's shocked eyes were about to pop out.

Damn, what did he see?

An invitation to the International Mathematics Conference held in Princeton, specially invited to give academic presentations in the past!

What kind of god-level treatment is this.

His envious and jealous back molars are about to be crushed!!

......