As time went by, the problem of the existence and smoothness of the NS equation solution gradually spread throughout the academic world.
While the mathematics community was enjoying the carnival, a point of view suddenly began to spread in the physics community.
[Xiao Yi should be a physicist who is good at mathematics, so the two questions Millennium Prize Problems he solved are both related to physics.]
As for this view, the vast majority of people in the physics community quite agree with it, so much so that quite a few scholars and students in the physics community have begun to express support for this statement.
After all, whether it is NS equation or the mass gap issue, they are indeed issues deeply related to physics.
So Xiao Yi is a physicist, which makes sense.
Of course, this naturally aroused refutation from many scholars and students in the field of mathematics.
Just kidding, if you study a few physics problems, you will become a physics person?
Xiao Yi is obviously a mathematician with good roots, okay?
Immediately, people from both sides started a scolding war on the Internet.
[Obviously, Xiao Yi is a physicist first, and a mathematician second. Otherwise, in Millennium Prize Problems, he would not have solved the NS equation problem and the mass gap problem first, but problems like Hodge Conjecture and Riemann Hypothesis.]
[It's hard not to support it. Finally I saw someone speaking out about this matter. In the past, people always thought Xiao Yi was a mathematician. What a joke! Compared with mathematics, among the results made by Xiao Yi, it is obvious that the results 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, but you actually have such an idea. Please, which of Xiao Yi's achievements in mathematics can be compared with physics?]
[The NS equation problem and the mass gap problem are Millennium Prize Problems. "Mathematical" problems are both said to be mathematics. Does that mean that physics is also a part of mathematics? I think those who study physics have a bit of humor in them.]
[I think those of you who study mathematics are really humorous, and you don't have to look at Xiao Yi's recent achievements to see which of them are related to mathematics.]
[Those who study physics are here again to be embarrassed. Even if you say that NS equation is related to physics, what do you say about the explosion trend theory? This thing has nothing to do with your physics. It is a purely mathematical theory.]
[Funny mud pee]
[Look, I'm in a hurry, I've broken my guard]
[You#￥! @...]
[...]
A controversy started about whether Xiao Yi is a physicist or a mathematician, which made people laugh and cry.
But given the mutual contempt between mathematics and physics, it is quite normal for something like this to happen. After all, each wants to prove that the other is inferior to themselves.
But, this kind of thing only happens online.
Xiao Yi also didn't pay attention to this matter at all.
At this time, he received an invitation call.
"Hello, Professor Xiao Yi, I am Tim Bonas, President of American Mathematical Society. First of all, on behalf of American Mathematical Society, I would like to express my most sincere congratulations to you."
"NS equation plays a very important role in both mathematics and physics. We all know that it is closely related to the simulation analysis of fluid mechanics. Therefore, being able to solve this problem is a goal that all of us dream of, and you have successfully completed this goal for us."
"Both the mathematics and physics circles are talking about you now."
Xiao Yi in the office, holding his mobile phone, listened to the other party's congratulations, smiled and said, "Thank you, President Bonas. Solving this problem is the wish of each of us. I am just lucky and found a way to success."
"Hahaha!" Tim Bonas laughed and joked, "If someone says that they are lucky enough to be able to solve such a problem, then I am definitely willing to believe it, but if it is you, forget it. People who can solve two Millennium Prize Problemss may be lucky. You probably don't even believe it."
Xiao Yi chuckled lightly and did not refute this, and then asked, "But President Bonas called me because of other things, right?"
Tim Bonas smiled, "Of course, there are less than ten days left before Joint Mathematics Meeting at the end of the month. We have invited Professor Xiao to participate before, but you refused, but now, you have proved such a heavyweight problem. I believe that all those who are preparing to participate in Joint Mathematics Meeting are discussing this matter enthusiastically and are looking forward to hearing your report."
"So, on behalf of this Joint Mathematics Meeting, I would like to extend an invitation to you again to come to us to give the NS equation report."
"Believe me, each of us misses your presence on the podium."
Facing Bonas' invitation, Xiao Yi became silent.
He had anticipated the other party's invitation before he answered the phone.
Joint Mathematics Meeting is the second largest academic conference in the mathematics community after International Congress of Mathematicians. With more than a thousand people attending each conference, it can be said to be quite large in scale.
It is indeed suitable as an academic conference for the NS equation problem proof report meeting.
It's just...
Xiao Yi said apologetically, "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."
"In addition, I have other more important things during this period of time, so I am unable to go to San Francisco to attend this year's conference."
"This way there is no need to trouble Joint Mathematics Meeting, because I will adjust the agenda temporarily."
"Regarding NS equation's report meeting, I plan to hold it in March this year. It will be held at the school where I currently work, University of Science and Technology of China. If President Bonas is interested then, I very much welcome your participation."
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 also study PDE myself, and I am probably one of the people who are looking forward to your lecture the most."
Xiao Yi smiled and said, "Thank you, President Bonas, for your understanding. I will welcome you to China then."
"Okay!"
Hang up the phone.
Xiao Yi shrugged and put the phone next to him.
It is indeed inconvenient for him to go abroad now. As a Outstanding Young Scholar or Changjiang Scholar, he needs to report when he goes abroad. Then the Ministry of Foreign Affairs, National Security and other relevant departments will evaluate the existing risks and decide whether it is necessary to go abroad.
If you are a scientist in the social sciences or in the field of completely civilian technology, it doesn't matter if you can't go abroad. But for a scientist like him who masters a variety of core technologies and has unlimited potential, it is naturally not that easy to go abroad.
However, he doesn't care about this at all. Anyway, he is too lazy to go abroad. Wouldn't it be nice to stay at home?
Stop thinking about these questions in your mind.
His thoughts returned to the question he had been thinking about.
Greenwald limit.
Others thought that he developed the explosive trend theory to prove the problem of NS equation.
This is indeed true, but it is not that specific, because he proved the NS equation problem and also aimed to solve the Greenwald limit problem.
Has Greenwald limit really reached its limit?
Xiao Yi turned over the previous draft paper and found the new model he derived to combine the multi-fluid model and NS equation.
At that time, because of the singularity problem caused by NS equation, this model could not continue to advance. Only by proving the smoothness of NS equation could it continue.
Now, he not only proved the existence and smoothness of NS equation, but also proved it from a more general perspective.
Therefore, this old model can be completely overthrown and started again.
Combining the more general NS equation with the multi-fluid model to create a more complete model may allow Greenwald limit to move forward even more.
Without any nonsense, he started to take action.
Previously, he used NS equation with specific initial conditions to combine it with the multi-fluid model. In this case, the technical requirements were relatively complex. After all, it was necessary to take care of various factors brought about by specific initial conditions, and the original information needed to be retained when the two were combined.
But now, under generalized conditions, the combination is much more convenient and faster.
Moreover, the new model he plans to build now is based on Xiao's Space.
Xiao's Space is very suitable for the construction of this kind of fluid model.
Whether it is a low-temperature fluid or a high-temperature fluid such as plasma, it is the same.
In this way, as time passed, Xiao Yi finally stopped writing in his hand.
Looking at the brand new model on the draft paper, he smiled and said it was done.
Next, it is time to use the computer to perform calculations.
This kind of fluid model certainly needs to be simulated by a computer, otherwise the direct Direct Numerical Simulation DNS technology would not be developed.
Wang Hao was called, and Xiao Yi ordered, "Please contact Chaohu Mingyue for me. I need to use the supercomputer."
Wang Hao nodded and said, "Okay, I'll call Director Tu from Chaohu Mingyue now."
Then he took out his mobile phone and left the office to make a call.
Xiao Yi While waiting for the result of his call, he picked up the tea cup next to him, took a sip, and then shook the cup.
Suddenly, his eyes stared into the cup.
At the same time, the ability of [Perfect Engineering] was quietly activated.
The vision suddenly changed.
Just like activating [Material Mastery] requires measuring various data of materials through various experiments, there are also conditions for activating [Perfect Engineering].
That is what he needs to understand the complete structure of an engineered creation.
For example, for a mobile phone, he needs to understand the structure, location, wiring arrangement and other information of all the electronic components inside the mobile phone before he can launch [Perfect Engineering] to simulate the mobile phone.
However, compared to Material Mastery which requires physical objects, [Perfect Engineering] does not. You only need to understand the structure in your mind to start the simulation.
Of course, in addition, as long as Xiao Yi looks at it carefully, [Perfect Engineering] can also model it directly in his mind and simulate the model of the entire engineering creation.
Now, Xiao Yi directly simulated the tea cup in his hand in his mind. After all, the tea cup is not complicated. It has a transparent double-layer glass body, a stainless steel tea drain on it, and a cup lid.
As he shook it, the water in the cup began to form a vortex. Similarly, in the cup model in his mind, the water inside also rotated and formed a vortex.
This rotation method is actually similar to the way the plasma surrounds Tokamak device.
When the plasma flow is confined in the ring device by Tokamak device, it rotates inside like a vortex.
Through the model in his mind, Xiao Yi can clearly "see" how the fluids move in it.
He couldn't help but think about it.
"Is Tokamak device really the best choice?"
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 at any time after tomorrow."
Xiao Yi nodded. "Okay, then let's go tomorrow."
"In addition, help me publicize it to the outside world. I will put NS equation's report meeting on March 15th, and it will be held at USTC then."
Upon hearing the news, Wang Hao's eyes lit up. "NS equation? Okay, I understand."
Although he is currently doing administrative work, he was also a physics lecturer before. He also knows very well how difficult the NS equation problem is, and he also knows how widespread the impact will be after this problem is proven.
For example, even if he had not personally experienced the impact of the quality gap problem, he could still clearly realize it.
And now that I am lucky enough to participate in such a grand event, I feel even more grateful that I applied for this position in the first place.
At this time, he suddenly asked, "By the way, Director Xiao, outside now, 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 laughed, and replied after a moment, "Theoretical Physicist wastes paper, and experimental physicists waste electricity, Theoretical Experimental Physicist Fermi, Mathematical Physicist Xiao Yi."
Wang Hao looked confused.
The next day.
Xiao Yi took the model to Chaohu Mingyue again, uploaded the model with ease, and then started running.
Although this model is relatively complex, it is obviously much easier than the bunch of models he had to run last time he came here.
It didn't take long for the final results to come out.
"35%! This limit can be increased by 35%!"
Some staff members shouted that although they did not understand Greenwald limit, it was still very simple to compare the size of the results.
At this time, even if they are not engaged in this, they can still understand what a major breakthrough Xiao Yi's achievement is.
Looking at the final result, Xiao Yi smiled.
"Congratulations to Professor Xiao. The optimization level is 35%. This should be enough to issue a PRL, right?"
Tu Ran congratulates Xiao Yi.
Xiao Yi pondered for a moment, then replied, "It should be okay."
The 2022 paper that made a breakthrough on Greenwald limit was finally published on PRL.
Of course, he will definitely not post it, and in the end he will just post it on his personal website.
The most important thing is to inform Plasma Institute.
Thinking of this, he took out his mobile phone and called Zhao Zhanyou, the director of Plasma Institute.
Soon, the call was connected.
The voice of Zhao Zhanyou came from the other side. "Hey! Professor Xiao, I didn't expect you to call me. I haven't mentioned it yet. Congratulations 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 am calling you this time for another matter."
"I have completed the research you asked me for last time. According to my results, compared to the 2022 paper, Greenwald limit can continue to improve by 35%."
After he said this, there was silence on the other side for a long time.
Until the end.
"Ah?"