Chapter 119 The surprise brought by Lin Xiao

After introducing Lin Xiao, Tang Qing introduced other people to Lin Xiao. The first was a professor from the Institute of Physics named Cao Chengqing.

As for the other slightly younger people, they are Tang Qing's graduate students and postdoctoral fellows here.

After getting acquainted, Tang Qing said: "Okay, there is no need to say anything else. Since we are all here, let's start this group meeting now."

"Lin Xiao, have you ever held a group meeting before?"

"No." Lin Xiao shook his head.

"Oh? So were all your previous results independently researched by yourself?"

"Yes."

"That would be awesome."

Tang Qing nodded, and everyone else was also a little surprised. It was indeed amazing for one person to independently research those important results.

"Since this is your first group meeting, just take a look at it first. Oh, by the way, there is also a project cooperation agreement that you need to sign. It is mainly about the confidentiality of the research content. You should know this. Bar."

After saying that, Tang Qing took out an agreement from the briefcase next to him and placed it in front of Lin Xiao. Lin Xiao naturally signed the agreement without any doubts.

After that, the group meeting officially started.

The task group meeting is to report their respective progress and make a PPT to share, to tell other members their results, and to avoid someone being lazy.

So the first few young people walked up and began to share their work from the previous week.

After all, young people like them are not as knowledgeable as their tutors, and generally cannot provide any useful help in the main direction of the subject. Therefore, the most they usually do is share literature and help tutors and other people with high qualifications and rich knowledge. Provide something that can be used.

Lin Xiao listened to their reports with great interest.

From time to time, you can also see some things that seem to be very high-end just because of their titles, such as "Zero Conditions of Quasi-Linear Wave Equations in Two-Dimensional Spaces", and "The Overall Existence of Nonlinear Elastic Waves".

These documents can also help them with this topic.

As they shared, Tang Qing and another professor also listened and discussed. If there was something useful, their eyes would light up and they would write down the relevant things.

Soon, the graduate student's sharing ended, and Tang Qing and the two professors began to discuss the in-depth issues of the topic. They stood in front of the blackboard and wrote down a few formulas on it from time to time, while other young people were discussing. He gathered around and listened, absorbing the knowledge from the instructor.

Tang Qing rubbed his chin and looked at a formula written on the blackboard in front of him.

【(t)ΓαY…(t +r)DΓαY】

"We need to estimate a weighted L2 generalized energy norm," he said.

"Yes." Cao Chengqing nodded. He wrote a few more lines based on Tang Qing's formula, and then said: "But obviously there is a problem. We have to control the weighted generalized L2 energy based on the generalized energy Eκ. Xκ.”

"Um……"

Tang Qing suddenly took the blackboard pen and wrote a formula on it.

【r(t)Y】

Then he said: "Then let's estimate the r-weighted zero shape of this thing?"

Cao Chengqing looked at it and his eyes lit up.

Tang Qing said: "You can give it a try."

Then, they started to take action.

Of course, they started working on scratch paper, after all, the blackboard was limited.

While watching the three professors' hands-on work, several graduate students also began to think hard and also wanted to try to estimate this r-weighted zero shape.

However, Lin Xiao stared at the formula on the blackboard.

He has his own unique thinking about this kind of thing that is already mathematical.

After thinking for a moment, he took the pen in his hand and started writing on the scratch paper.

Although he has not made any outstanding results in partial differential equations, this does not prevent his mathematical skills in this area from being still powerful.

Everything remains the same, it is ultimately a game of numbers and logic, especially since Lin Xiao's current brain development has reached 3.65%, which is gradually approaching the situation when he used the sage state. In addition, mathematics has reached 3.65%. At level 3, at this time, he already has an intuition about mathematics that is difficult for ordinary people to understand.

So after writing down a few calculations, he frowned and said softly: "This won't work."

When everyone was thinking about the problem, although his voice was softer, it was still quite obvious. After others heard it, they couldn't help but look at him.

"It doesn't work?"

Tang Qing asked.

Lin Xiao said this, obviously denying his proposal.

But he wasn't angry either. That's how the project research was. No one made any mistakes, which was obviously abnormal. Only by constantly making mistakes could they continue to succeed.

Of course, when raising an error, you also need to explain the reason.

Therefore, he was also waiting for Lin Xiao to give the reason why this direction would not work.

Tang Qing also said: "Tell me what you think."

"Because r is not in the Ap class of the zero-order Riesz operator with p equal to 2 in two-dimensional space."

Lin Xiao directly stated the reason.

After hearing Lin Xiao's words, Tang Qing and Cao Chengqing were stunned.

"p equals 2?"

Tang Qing murmured, then wrote on the scratch paper, and his eyes suddenly focused: "Yes... it is indeed the case. In this way, we cannot directly estimate the r-weighted zero shape."

Cao Chengqing also nodded.

After Lin Xiao's reminder, they immediately realized this problem.

Although it doesn't mean that they can't discover it, the problem is, if Lin Xiao hadn't brought it up, God knows how much time they would have spent on it.

Lin Xiao actually took less than five minutes to point out that this road would not work, which they had to admire.

"sharp."

Tang Qing gave Lin Xiao a thumbs up gesture.

Wang Wei introduced Lin Xiao before. The reason why he agreed was actually because he liked Lin Xiao's potential and wanted to cultivate a relationship with Lin Xiao. He also didn't think about how much help Lin Xiao could provide.

After all, in everyone's opinion, Lin Xiao is destined to develop in number theory. After all, he has shown such a strong talent in number theory, and number theory is enough for a mathematician to study for a lifetime. Most famous Mathematicians specialize in one direction throughout their lives.

And using a hammer in the east and a stick in the west is obviously a waste of talent. Even Tang Qing was prepared to wait for a while, waiting for Lin Xiao to waste time in their research group, and then tell him to concentrate on a Research in the field.

But now it seems that he is still underestimated.

His mathematical talent seems to be very helpful for their research on mathematical physics.

Professor Cao Chengqing also praised: "Yes, he is truly a mathematical genius."

As for other graduate students and postdocs, they can only express their conviction at this time. No matter what, they are all geniuses. Even if they are not specialized in partial differential equations, even if they understand it, they are not in a position to question it.

However, in the face of the appreciation of the two seniors, Lin Xiao just said modestly: "Actually, that's it. It's mainly because it's about mathematics. I can understand it. When it comes to physics, I really don't understand it." There’s a way.”

"Haha, no need to belittle yourself."

Tang Qing waved his hand and said: "Then it seems that our previous direction was wrong and we need to think about a new direction."

"Um."

Cao Chengqing nodded and began to think deeply again.

Although the previous direction was wrong, just change the direction and think again. The problem is not big, as long as it can be corrected in time.

After all, when researching a topic, what you fear most is not encountering problems, but the lack of problems.

In order to achieve the final goal, the intermediate steps need to be divided into small problems one by one, and then until the final step, but if you don't even know what the problem is, then you are finished.

That's like not even knowing in which direction to exert force.

However, just after they lowered their heads, Lin Xiao spoke again.

"We can just change it and estimate it will be fine."

"Um?"

The two professors who just lowered their heads immediately raised their heads again. Did Lin Xiao come up with another method?

Lin Xiao stepped forward and said, "Can I use my pen?"

"for you."

Tang Qing handed the blackboard pen to Lin Xiao, wanting to see what kind of surprise Lin Xiao could bring him again.

After taking the pen, Lin Xiao wrote a formula directly on the blackboard.

【(t)Y】

“We don’t need to estimate the thing before; we just estimate it.”

Looking at what Lin Xiao wrote, Tang Qing narrowed his brows and said, "Keep talking."

"We define this weighted L2 generalized energy as..." Lin Xiao began to write the following formula on the blackboard.

【Xκ=∑|α|≤κ2(∫……】

As Lin Xiao wrote down the formulas line by line, the two professors' eyes became extremely serious. They quietly looked at Lin Xiao's calculations while also following the calculations with their hands.

Tang Qing's graduate students could understand it at first, but became more confused as they went on.

What are they talking about...

Did they, a graduate student in mathematics at Peking University, study for nothing?

They wanted to ask something, but seeing that the two professors were listening attentively, and seeing that the postdoctoral seniors next to them were also thinking hard, they could only give up and wait until later to ask.

In front of the blackboard, after Lin Xiao wrote the last few lines of expressions, Tang Qing finally couldn't help but say: "Wonderful!"

Cao Chengqing couldn't help but applaud.

The mathematical method used by Lin Xiao directly and perfectly answered their questions.

Now, with this critical step from Lin Xiao, they have successfully estimated the L2 generalized energy norm.

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