Chapter 374 Visiting Harvard

Mr. Qiu Chengtong is the only one who is authoritative enough in the field of partial differential equations. Lu Zhou thinks about it.

There is really no need to say much about Mr. Qiu's achievements in differential geometry.

Opening the preface of "Lectures on Differential Geometry", you can see such a sentence - "He is the founder of the school of geometric analysis".

What is geometric analysis?

It is to move the method of partial differential into differential geometry.

Although the domestic academic circles have mixed evaluations of him due to the sharp conflict with Yanda, the international academic circles still have a very high evaluation of this Chinese scholar.

And this can be seen from the honors he has received.

There are only two mathematicians in history who have won the Fields Medal, the Wolf Medal, and the Craft Medal at the same time. One of them is Lu Zhou's mentor Deligne, and the other is Qiu Chengtong.

At the time of the Shiingshen Chern Mathematics Award, Lu Zhou and Mr. Qiu met once, but because of their different research directions, they did not have much contact with each other.

The NS equation is a problem in the field of partial differential equations, and for the field of partial differential equations, among the scholars Lu Zhou knew, there is no doubt that Mr. Qiu's achievements and knowledge are the highest.

In Cambridge, Massachusetts, in the Boston metropolitan area, a sturdy Ford Explorer parked near the building of the Department of Mathematics.

After getting out of the car, Lu Zhou looked around and didn't know how to go the next way.

So, relying on his intuition, he stopped a passerby who looked like he was studying mathematics and asked.

"Hello classmate, how can I get to Professor Qiu's office?"

"Are you looking for Professor Qiu?" The boy wearing glasses looked at Lu Zhou suspiciously. He always felt that this person looked a little strange, but he couldn't remember where he saw it before, so he asked, "What do you want from Professor Qiu?"

Lu Zhou: "I have some questions to ask."

Perhaps it was because he was too young to ask any clever questions. After hearing this, the man with glasses smiled slightly: "Professor Qiu doesn't have time to answer those simple questions for you. If you have any questions, you can directly answer them." Ask me."

Slightly stunned, Lu Zhou then smiled and said, "Really? Then you can explain to me why there is no non-trivial backward self-similar solution to the Navier-Stokes equation?"

The moment he heard the question, the man with glasses was stunned.

However, unwilling to just admit that he couldn't figure it out, he began to try to think about it. However, he frowned and thought hard for a long time, but he couldn't figure out how to answer this question.

It can be seen that partial differential equations should be his specialty, and he also knows something about Navier-Stokes equations.

However, it is also obvious that he has not gone deep enough into his major, or that his research direction is not on it.

Otherwise, it is not difficult for him to know after a little research on the Navier-Stokes equation. This question was actually answered by three mathematicians including Necas in 1995.

Lu Zhou looked at his watch and said casually, "Can you take me there now?"

"Okay, brother, you stopped asking me," the man with glasses smiled calmly, nodded reluctantly, "...Come with me, but old Mr. Qiu is a busy man, I can't guarantee that he will definitely see you. "

Lu Zhou smiled, didn't say anything, and followed behind him.

While walking and chatting on the road, Lu Zhou learned that this man's name is Zhao Yi, who graduated from Shuimu with a bachelor's degree, and is currently studying in the Department of Mathematics at Harvard, where Mr. Qiu's good friend, Professor Steve Nadis, is studying. Straight blogging.

"Are you a freshman in the undergraduate department?"

Lu Zhou did not deny it, but asked instead: "Why do you say that?"

Zhao Yi grinned: "Because you have quite a lot of hair, and you look younger."

Lu Zhou: ...?

This……

Is that also a reason?

Without stopping there, Zhao Yi continued to talk eloquently: "...you probably read that question from some reference book, but I suggest you, before studying these cutting-edge fields, you'd better focus on Based on the knowledge of this major, it is more important to lay a solid foundation than to study those super-level content.”

This man is quite interesting, not bad-minded, but a little too enthusiastic.

If he becomes a professor in the future, he will be loved by diligent students.

Lu Zhou smiled: "It makes sense, I've been taught."

Seeing that this "student" was so educated, Zhao Yi was very happy, so he smiled heartily, and said generously: "When you are away from home, everyone is a compatriot, and it is right to help each other. In the future, if you have any questions that you don't understand, you can come to me. Me, you can call me Brother Zhao, or Brother Sihuo!"

Lu Zhou: "Then call it Brother Sihuo."

This name sounds more interesting.

Zhao Yi said with a smile: "You know my name, so you should tell me what your name is."

"Lu Zhou."

Lu... Zhou?

Zhao Yi was stunned for a moment, frowning, his brain didn't turn the corner for a while.

As they were walking, the two had already reached the door of Mr. Qiu's office.

Although the office door was open, out of politeness, Lu Zhou knocked lightly on the door.

After stopping the pen in his hand, Mr. Qiu, who was writing at his desk, raised his head.

When he saw the person who appeared at the door, the old man was slightly stunned for a moment, and then he stretched out a kind smile on his brows that were locked because of thinking.

"Hey, rare visitor." Putting down the pen in his hand, Mr. Qiu got up from the chair, and greeted the door with a smile, "What kind of wind blows you out of the small room in Princeton?"

Lu Zhou smiled and said modestly: "I have encountered a bottleneck in research, and I would like to ask you some questions about partial differential equations."

Seeing Mr. Qiu's attitude towards this young man, Zhao Yi, who was standing at the door, froze on the spot and stood there with a dazed expression.

At this moment, he always thinks about why the sense of sight comes from...

Thinking of how he had pretended to be coercive to this big boss for a long time just now, he felt ashamed and wanted to find a crack on the ground to sneak in.

He didn't notice the change of expression on the face of the man at the door. After hearing Lu Zhou's explanation of his visit, old Mr. Qiu's eyes suddenly flashed a look of interest.

"Partial differential equations? This is a field I am familiar with. Can you tell me what direction it is?"

"It's related to the NS equation."

Slightly stunned, the interested expression in Mr. Qiu's eyes became more and more intense.

"NS equation? This is an interesting question... Sit down first, I'll look for my teapot, I'm afraid we won't be able to finish talking about this topic for a while."

Lu Zhou nodded and sat down casually beside the tea table.

At this time, Mr. Qiu suddenly noticed that this person was still standing at the door, and hesitated a little.

"……You are?"

Zhao Yi quickly stood up straight and said, "I am Zhao Yi, and I am studying for a Ph.D. with Professor Steve Nadis!"

"Oh, a student of Professor Nadis." Mr. Qiu hesitated for a moment, and pushed his glasses, "...then you will sit too?"

"No, no need," Zhao Yi quickly shook his head, scratched his head and said with a dry smile, "I just brought Professor Lu here, so I won't bother the two big guys to discuss business."

Although listening to the big guys exchange math problems, it will definitely help my research.

But sitting next to these two great gods, for him, a little transparent, the pressure is really too much...

"It's all about learning, there's no such thing as a big brother." Hearing this interesting speech, Mr. Qiu laughed, and waved to the young man, "Come and sit down, no matter how you say it, you can have a drink." Have a cup of tea before leaving."