Huaxia, Huaqing University, Qiuzhai.

Mr. Yuan, who is the same age as the Republic, is already 86 years old and has completely retired for more than five years. Fortunately, he is still in good health, but there are fewer people coming to Huaqing.

There is nothing else to do every time I come. I mainly meet Qiao Yu in Qiuzhai, and the same is true today.

The old man was stubborn and always felt that letting Qiao Yu go to his house to meet him was disrespect for him, his precious disciple.

Before he retired, Qiao Xi finally graduated from a master's degree in Huaqing. The title of the graduation thesis is "Study on the Existence of Solutions for Nonlinear Partial Differential Equations Based on Qiao's Algebraic Method"

In the current academic community, Qiao Algebra specifically refers to an algebraic system of generalized modal axioms.

It is worth mentioning that this paper was also named the best paper at an international mathematics conference supported by the International Mathematics Alliance, but Qiao Xi did not receive the award.

Qiao Yu also wanted Qiao Xi to achieve more results and compete for a Fields Medal. However, Qiao Xi himself was not interested in this. After graduation, he even refused the olive branch from Huaqing and did not ask for the title of associate professor. He went to the Institute of Mathematics to work as an assistant researcher.

In Qiao Xi's own words, her ability is only suitable for being an assistant, and for the associate professor, she is afraid of misleading her children.

But to be honest, in Yuan Zhengxin's opinion, he, a female disciple, is more than enough to teach undergraduate students.

Qiao Xi is actually very sensitive to mathematics, and has a flexible mindset, which is especially suitable for teaching. And when he is old, it is not suitable for research. But Qiao Xi does not want to be an associate professor, and no one can force him.

In Qiao Xi's own words, it is enough for Qiao Yu to contribute to the mathematics community in the Qiao family. It is more suitable for her to help people who really study mathematics.

Perhaps it was because the mother didn’t want to take too much attention from her son, which made Mr. Yuan admire him very much.

Qiao Yu, this child is lawless and doesn't care about anything like the name in front of him or her. But the old man still cares. So it's good for Qiao Xi to have this idea.

Of course, today we met Qiao Yu not for these messy things. It was simply that the old man felt that Qiao Yu could not waste his youth so much.

This world is unfair to anyone.

Some people only ask him not to cause trouble, and they can be honest and lie down.

But even if some people do a lot of things, some people think they are wasting their time and should do more.

There is no doubt that Qiao Yu belongs to the latter.

Even though he is now the commander-in-chief of the China manned lunar landing project and is highly anticipated, in the eyes of Mr. Yuan, this child has not done anything serious in recent years.

You must have some education. A good math person is not doing his job properly every day and focus on engineering. Who will not have a headache?

Qiao Yu was so thief that he had just accepted a remote video interview and knew that Mr. Yuan was waiting for him in Qiuzhai, so he asked Xia Keke to bring their children over to meet him and go to Qiuzhai together.

Yes, Xia Keke got pregnant shortly after getting married, and the boy named Qiao Zisong.

It doesn't sound that good, but Mr. Yuan must give him a name himself and gets the support of Qiao Xi. Qiao Yu and Xia Keke can only pinch their noses and recognize them.

Of course, Qiao Yu knew that this name was not for the child at all, but for him, so he planned to do so. When the child was a little older, he would throw it directly to Mr. Yuan when he had nothing to do and let the old man take it with him...

Anyway, the child is born without grandpa and grandpa, and Mr. Yuan and Tian Yanzhen are ready-made grandpa and grandpa. As for the slightly confusing generation, Qiao Yu doesn't care.

Just talk about your own.

The old man likes to chant, but there are two-year-old kids who are doing buffering in the middle, which can attract Yuan Yuan’s attention.

This is indeed the case.

When he arrived at Qiuzhai, he pushed open the door without saying hello. Old Yuan was about to lose his temper when he saw the child in Xia Keke's hand, his originally stern face instantly changed into a kind smile that was as kind as he wanted.

"I'm also reflecting myself. Hurry up, let grandpa see if you raise it well and whether you have gained weight."

Qiao Yu couldn't help rolling his eyes.

The older generation always thinks that only when children are fat is well raised, which is completely disrespectful to science. It is serious that they cannot be overweight.

However, thinking that he was here to be scolded today, Qiao Yu still resisted the complaints.

Next is to leave the script. Xia Keke held the child to make the old man happy, while Qiao Yu poured himself a glass of water, and then took a picture of the book in the old man's bookcase and flipped it.

Mr. Yuan hasn't seen this cheap grandson for more than half a month. Based on his past experience, he will have to be tired of it for at least a quarter of an hour before he will come to talk to him about his serious matters.

When I feel better, I will naturally lose my momentum when I get scolded later. The most important thing is that the old man is forgetful and may play with the child for a while and forget to ask him for what he wants to do. In that case, I will be over again today.

To be honest, Qiao Yu really has no motivation to continue to do scientific research.

The dreams of the past have basically come true. Xingcheng’s community has also been renovated. As he wished, the sculpture of grandfather Qiao Guozheng has been erected at the entrance of the community.

A special sign was also set up to introduce Lao Qiao's life in detail. The contents in it were from the hands of everyone in Xingcheng and were also included in local chronicles.

He didn't know how to spend the money. His Xiyu Technology Company can now make a fortune by relying solely on patent authorization.

Although he is only twenty-six years old this year, he can already make a big fuss in his field, and almost no one will question it. Most of the people who question it can no longer make any noise.

Even if I said something, no one would pay attention to it.

It’s really not that Qiao Yu is petty and deliberately retaliated against or something. The main reason is that at his current position, he has never paid attention to these messy things, so someone took the initiative to do it.

The actual situation is that Qiao Yu really doesn't care that someone is cricketing him on the Internet.

People may question other twenty-six-year-old doctoral supervisors. After all, most of them are engaged in scientific research. At the age of twenty-six, they are still in the stage of fighting wits and courage with their mentors.

But no one would question Qiao Yu's identity as a doctoral supervisor at the age of 24.

The Fields Medal winner, the Nobel Prize winner, just didn't receive the prize. Others include Clay Award winner, Ramanujin Award winner, and Gauss Award winner.

The American Mathematics Society also gave Qiao Yu a mathematical research contribution award, and there were countless other small awards.

There are also several lifelong awards from the scientific community that have not been won, mainly because he is still too young.

Even Huaxia did not award the highest science and technology award to him, and everyone's worries were the same - there would be no awards to be awarded if they made achievements in the future.

Even the International Mathematics Alliance has considered preparing a Qiao Yu Award in the future to award it to future math rookies.

Of course, this requires some financial support, but Qiao Yu is too lazy to consider these things for the time being. He has no idea about Xu Ming now and is pursuing happiness.

After all, if you don’t enjoy your life quickly in your twenties, you can only cultivate yourself and be able to enjoy yourself when you get old.

Unfortunately, Mr. Yuan has a very good memory today. After teasing for a while, he signaled Xia Keke to carry the child aside first, and then his eyes naturally fell on Qiao Yu who was reading a book next to him.

"Yeah, cough..." The old man cleared his throat.

Qiao Yu was half-hearted in reading this book, so he immediately put down the book and looked at Mr. Yuan.

"Grandpa Shi, what advice do you have?"

"I dare not give you advice! Qiao Yu, now I think you were really well-behaved when you were a child. At that time, no one needed to say anything, and you worked hard every day.

No matter what I go out to do, I will remember to report to me the next day. If you have any ideas, come and discuss with me as soon as possible.

I just realized it now. In fact, you were not purely studious at that time. You simply didn’t have a hard wing, right?"

Even though Qiao Yu was so shameless, he couldn't bear to eat anymore. He immediately complained: "No, Grandpa Shi, you misunderstood me! I've never thought so!"

"Oh? Then let me ask you, how long has it been since you've done research on mathematics? How many propositions have you considered over the years? What are the results?

I won’t talk about scientific research. Just tell me, how many students have you recruited after getting a doctoral supervisor? How much focus has you put on cultivating students?

Yan Zhen was so angry that he came to me to complain! You were so embarrassed to say that we misunderstood you? I asked you, what about your original intention? Your pursuit of mathematics has stopped?!"

Well, Qiao Yu can be sure, the old man is very angry.

He was so angry that he didn't even give him face if he was reflecting on his side. Of course, Qiao Yu was not afraid, mainly because he was afraid that the old man would get angry...

So Qiao Yu immediately aggrieved loudly and said, "Who said that? Grandpa Shi, Director Tian doesn't know what I'm doing recently! He said he was the commander-in-chief of the moon landing, but I have been thinking about mathematical problems! To be honest, I have been studying turbulence recently."

"Oh?" Yuan Zhengxin glanced at Qiao Yu, half-believing and half-doubting.

Qiao Yu is a sensible person.

At this time, you must not show your fear. Everyone thinks that he is a young man and will help him.

But these people certainly don’t know that no noble people are easy to fool.

Whether it is Mr. Yuan or Director Tian, ​​they have the ability to see through the essence at a glance. His little thoughts can be seen if they are not good. It can only be said that no one can succeed casually, and it is not easy for everyone.

"Of course it's true! You know, I'm now looking to space! The Navi Stokes equation is the core equation of fluid dynamics!

Why can't we prove the existence and smoothness of the Navi Stokes equation now? Isn't it because we don't understand the nature of turbulence?

Once abstract mathematical problems are solved, there are often unexpected applications! I have always believed in this. I believe that if this problem is proved, the entire aerospace engineering will inevitably be completely revolutionized in the future!

So actually I have been thinking about this issue recently! But you also know that the turbulence problem is too difficult! Especially in three-dimensional space, vortex stretching allows the vortex intensity to increase infinitely with the movement of the fluid.

This may cause energy to accumulate at a small scale, triggering singularity. In addition, the nonlinear term in three-dimensional space may cause the derivative of the solution to tend to infinity within a finite time, and a singularity will appear, destroying smoothness!

You also know my personality. I have never been the kind of person who doesn’t make achievements and doesn’t like to show off everywhere! So Director Tian thinks I’ve been lazy recently, it’s really a misunderstanding!”

Qiao Yuyi said in a righteous manner.

"laugh……"

Really, if Xia Keke next to him couldn't help laughing out loud, Qiao Yu felt that his performance was quite perfect.

When Qiao Yu and the old man looked at her, Xia Keke was embarrassed to lift Qiao Zijiang, who was spitting bubbles in her arms, eased his embarrassment a little.

Fortunately, the old man's mood was obviously getting better.

He smiled and looked at Qiao Yu and said, "Oh? You have not slacked off so much? Is it because Yan Zhen misunderstood you?"

Qiao Yu nodded with a righteous look and replied, "Yes, Grandpa Shi! Just like you said, I have never forgotten my original intention!"

Yuan Zhengxin smiled even happier: "That's good! This question is good! The millennium problem has been there for so many years. Now, except for the Poincaré conjecture and the Riemann conjecture, the other five problems have not been solved.

It's great that you can look at turbulence! This is indeed a good problem and has very practical significance. As you said, the reason why we can't solve this problem is that we haven't figured out the nature of turbulence.
To be continued...