The top student must be diligent.

Chapter 215 Greenwald's limit increased by 35%!

As time went by, the question of the existence and smoothness of solutions to the NS equations was solved and gradually spread throughout the academic community.

While the mathematics community was celebrating, a new idea suddenly began to emerge from the physics community.

[Xiao Yi should be a physicist with good mathematics, so the two millennium problems he solved are both related to physics.]

The vast majority of people in the physics community agree with this view, so much so that quite a number of scholars and students in the physics community have begun to express their support for this statement.

After all, whether it is the NS equations or the mass gap problem, they are indeed problems that are deeply related to physics.

So it makes sense that Xiao Yi is a physicist.

Of course, this naturally caused rebuttals from many scholars and students in the mathematics community.

Are you kidding? Just by studying a few physics problems, you become a physicist?

Xiao Yi is obviously a mathematician from the Zhengbai Banner.

All of a sudden, people from both sides started a war of words on the Internet.

[It is obvious that Xiao Yi is a physicist first and a mathematician second. Otherwise, among the seven major problems of the millennium, he would not have solved the NS equation problem and the mass gap problem first, but problems such as the Hodge conjecture and the Riemann conjecture.]

[It's hard not to support this. Finally, someone has come out to say this. In the past, people always thought that Xiao Yi was a mathematician. What a joke! Compared with mathematics, among the achievements made by Xiao Yi, it is obvious that the achievements in physics are greater than those in mathematics.]

[Humor, I think this is a kind of self-confidence. I don't know where your judgment comes from. You actually have such an idea. Please, Xiao Yi's achievements in mathematics, which one can be compared with physics? ]

[The NS equation problem and the mass gap problem are the seven major mathematical problems of the millennium. Since they are all "mathematical" problems, does that mean that physics is also a part of mathematics? I think people who study physics have a bit of humor in them.]

[I think you who study mathematics are the most humorous. You don’t even look at Xiao Yi’s recent achievements to see which ones are related to mathematics.]

[Physics students are here to embarrass themselves again. Even if you say that the NS equations are related to physics, what do you say about the explosion tendency theory? This thing has nothing to do with your physics. It is a pure mathematical theory.]

【Funny mud pee】

[Look, he’s anxious again. His defense is broken.]

【You #￥! @……】

【…】

A war of words broke out about whether Xiao Yi was a physicist or a mathematician, which was both ridiculous and laughable.

But given the mutual contempt between mathematics and physics, it is quite normal for such a thing to happen. After all, each party wants to prove that the other is not as good as themselves.

However, this kind of thing only happens on the Internet.

Xiao Yi didn't pay any attention to this matter at all.

At this time, he received an invitation call.

"Hello, Professor Xiao Yi. I am Tim Berners, president of the American Mathematical Society. First of all, on behalf of the American Mathematical Society, I would like to express my sincerest congratulations to you."

"The NS equation plays a very important role in both mathematics and physics. We all know that it is closely related to the simulation and analysis of fluid mechanics. Therefore, being able to solve this problem is a goal that all of us dream of, and you have successfully achieved this goal for us."

"Now, both the mathematics and physics communities are talking about you."

Xiao Yi was in the office, holding his phone, listening to the other party's congratulations, and said with a smile: "Thank you, President Bonas. Solving such a problem is the wish of each of us. I am just lucky and found a way to success."

“Hahaha!” Tim Berners laughed and said jokingly, “If someone else said that they were lucky enough to solve such a problem, then I would definitely believe it. But if it’s you, forget it. The person who can solve two Y2K problems can be lucky. You probably don’t even believe it yourself.”

Xiao Yi chuckled and did not refute it. Then he asked, "But President Bonas called me for something else, right?"

Tim Bonas smiled and said, "Of course. There are less than ten days left until the Joint Mathematics Conference at the end of the month. We have invited Professor Xiao to attend before, but you refused. But now, you have proved such a heavyweight problem. I believe that all the people who are preparing to attend the Joint Mathematics Conference are discussing this matter enthusiastically and are looking forward to hearing your report."

"So, on behalf of this Joint Mathematical Conference, I would like to invite you again to come here to give a talk on the NS equation."

"Believe me, each of us has missed you standing on the podium very much."

Faced with Bonas' invitation, Xiao Yi fell silent.

He had anticipated the other party's invitation before he answered the phone.

The Joint Mathematical Meetings are the second largest academic conference in the mathematics community after the International Congress of Mathematicians. With more than a thousand participants each time, it can be said to be quite large in scale.

It is indeed suitable as an academic conference for reporting on the proof of the NS equation problem.

only……

Xiao Yi said apologetically: "I'm sorry, President Bonas, it may not be convenient for me to go abroad now, so it may be difficult for me to go to the United States."

"Also, I have other more pressing matters recently, so I will not be able to go to San Francisco to attend this year's conference."

“This way, there is no need to bother with the joint mathematics meeting because I can adjust the agenda at the last minute.”

"I plan to hold a report meeting on the NS equation in March this year. The venue will be the school where I work now, the University of Science and Technology of China. If President Bonas is interested in it, I also welcome you to attend."

Hearing Xiao Yi's refusal, Bonas could only say helplessly: "Okay, I understand your choice. Of course, I will not refuse your invitation. I will come to China on time. After all, I am also studying PDE. I am probably one of the people who is most looking forward to your lecture."

Xiao Yi smiled and said, "Thank you for your understanding, President Bonas. I will welcome you to China when the time comes."

"Ok!"

hang up the phone.

Xiao Yi shrugged and put the phone aside.

It is indeed inconvenient for him to go abroad now. As an outstanding young scholar and Yangtze River Scholar, he needs to report his trip abroad, and then the Ministry of Foreign Affairs, National Security and other relevant departments will assess the risks and decide whether it is necessary to go abroad.

If the scientist is in the field of social sciences or some completely civilian technology, it naturally doesn't matter whether he goes abroad or not. But for a scientist like him who masters multiple core technologies and has unlimited potential, it is naturally not so easy to go abroad.

However, he doesn't care about it at all. He is too lazy to go abroad anyway. Isn't it better to stay in the country?
Stop thinking about these questions in your mind.

His thoughts turned back to the problem he had been thinking about.

Greenwald Limits.

Others thought that he developed the explosion trend theory in order to prove the problem of the NS equation.

This is indeed true, but it is not so specific, because he proved the NS equation problem in order to solve the Greenwald limit problem.

Has the Greenwald limit really been reached?

Xiao Yi flipped open his previous draft paper and found the new model he had derived to combine the multi-fluid model and the NS equations.
At that time, due to the singularity problem caused by the NS equation, the model could not be advanced further. Only by proving the smoothness of the NS equation could it be moved forward.

Now, he not only proved the existence and smoothness of the NS equations, but also proved it from a more general perspective.

So, this old model can also be completely torn down and rebuilt.

Combining the more generalized NS equations with the multi-fluid model to create a more complete model may allow the Greenwald limit to be pushed further forward.

Without further ado, he started to act.

Previously, he used the NS equations with specific initial conditions to combine with the multi-fluid model. In this case, the technical requirements are relatively complex. After all, it is necessary to take into account the various factors brought about by the specific initial conditions, and it is necessary to keep the original information when combining the two. Now, under general conditions, combining them is much more convenient and faster.

Moreover, the new model he is planning to build now is based on the Xiao space.

Xiao's space is very suitable for constructing this kind of fluid model.

Whether it is a low-temperature fluid or a high-temperature fluid like plasma, it is the same.

Just like that, as time passed, Xiao Yi finally put down the pen in his hand.

Looking at the brand new model on the draft paper, he smiled slightly and decided it was done.

The next step is to use a computer to perform calculations.

This kind of fluid model, of course, needs to be simulated by computer, otherwise the direct numerical simulation DNS technology would not have been developed.

Xiao Yi called Wang Hao and ordered, "Please contact Chaohu Mingyue for me. I need to use the supercomputer."

Wang Hao nodded and said, "Okay, I'll call Director Tu of Chaohu Mingyue now."

Then he took out his cell phone and left the office to make a call.

While Xiao Yi was waiting for the result of his call, he picked up the teacup beside him, took a sip, and then shook the cup.

Suddenly, his eyes fixed on the cup.

At the same time, the ability of [Perfect Engineering] was quietly activated.

The perspective suddenly changed.

Just like launching [Material Mastery] requires measuring various data of materials through various experiments, launching [Perfect Engineering] also has the same conditions.

That is, he needs to understand the complete structure of an engineering creation.

For example, for a mobile phone, he needs to understand the structure, position, wiring layout and other information of all the electronic components inside the phone before he can launch the [Perfect Project] to simulate the phone.

However, compared to the need for physical objects to master materials, [Perfect Engineering] does not require this. You only need to understand the structure in your mind to start simulating.

Of course, in addition to this, as long as Xiao Yi looks at it carefully, [Perfect Engineering] can also be modeled directly in his mind and simulate the model of the entire engineering creation.

Now, Xiao Yi directly simulated the teacup in his hand in his mind. After all, the teacup was not complicated, with a transparent double-layer glass body, a stainless steel tea strainer, and a cup lid.

As he shook the cup, the water in the cup began to form a vortex. Similarly, in the cup model in his mind, the water inside also began to rotate, forming a vortex.
This type of rotation is actually quite similar to the way plasma orbits in a tokamak device.

When the plasma flow is confined in a ring-shaped device by the Tokamak device, it rotates inside like a whirlpool.

Through the model in his mind, Xiao Yi could clearly "see" how the fluids moved in it.

He couldn't help but think in his mind.

“Is the Tokamak really the best option?”

He also thought about this issue for a long time.

At this time, Wang Hao walked in again, "Director, Director Tu has agreed. You can go there anytime after tomorrow."

Xiao Yi nodded: "Okay, let's go tomorrow."

"Also, please help me publicize it. I will hold a lecture on the NS equation on March 15th at HKUST."

Hearing this news, Wang Hao's eyes lit up: "NS equation? Okay, I get it."

Although he is currently working in an administrative position, he was a physics lecturer before. He is well aware of the difficulty of the NS equation problem and the wide-ranging impact it will have once it is proven.

For example, he was able to clearly realize the impact of the quality gap problem even though he had not experienced it personally.

And now I am fortunate enough to be able to participate in such a grand event. For a moment, I am more and more glad that I applied for this position.

At this time he suddenly asked: "By the way, Director Xiao, now outside, people in the physics community think you are a physicist, and people in the mathematics community think you are a mathematician. What do you think?"

Hearing this question, Xiao Yi was stunned for a moment, then he burst into laughter and answered after a moment: "Theoretical physicists waste paper, experimental physicists waste electricity, Fermi is a theoretical and experimental physicist, and Xiao Yi is a mathematical physicist."

Wang Hao was confused.
……

the next day.

Xiao Yi took the model to Chaohu Mingyue again, uploaded the model with ease, and started running.

Although this model is also relatively complicated, it is obviously much easier than the pile of models he had to run last time he came here.

It wasn't long before the final result came out.

"35%! This limit can be increased by 35%!"

Some staff shouted that although they did not understand the Greenwald limit, it was still very simple to compare the size of the results.

Even if they were not engaged in this at this moment, they could still clearly see how significant a breakthrough Xiao Yi's achievement was.

Looking at the final result, Xiao Yi smiled.

"Congratulations, Professor Xiao. The optimization level is 35%. Should this be enough to publish a PRL?"

Tu Ran congratulated Xiao Yi repeatedly.

Xiao Yi pondered for a moment, then replied: "It should be possible."

The 2022 paper that broke through the Greenwald limit was finally published in PRL.

Of course, he definitely wouldn't post it, so in the end he would just post it on his personal website.

The most important thing is to notify the Plasma Institute.

Thinking of this, he took out his mobile phone and called Zhao Zhanyou, director of the Plasma Institute.

Soon, the call was connected.

Zhao Zhanyou's voice came from the other side: "Hey! Professor Xiao, I didn't expect you to call me. Come to think of it, I haven't congratulated you on solving the NS equation problem again. You have made another huge breakthrough in mathematics and physics."

Xiao Yi smiled and said, "Thank you, Director Zhao, but I called you this time for something else."

"I have completed the research you asked me to do last time. According to my results, the Greenwald limit can be further increased by 2022% compared to the 35 paper."

After he said this, there was silence for a long time.

till the end.

"what?"

(End of this chapter)