"You...... Keep talking! ”

Hearing Professor Lin Yao's request, Li Mu didn't talk nonsense, got up and left his seat, and walked to the blackboard.

Picking up the chalk, he began to write.

"First of all, the formula 2.12 we discussed earlier ......" Li Mu pointed to the equation 2.12 on the ppt with another finger, "It can actually be reformulated as ——"

As he spoke, he wrote the new style on the blackboard.

【DJ(v)(t)∈ S，DJ(v)(t)∈ S，∫ΩDJ(v)(t)……】

Seeing his newly written style, Lin Yao and Wu Mengyuan also left their seats, and then leaned in to make it easier for them to see more clearly.

Of course, more importantly, Li Mu's newly rewritten style has already made their eyes shine.

"And then ......"

"Introducing the Lagrangian multiplier λ ∈with constraint ∇·z = 0 H1 0 (Ω), it is clear that problem (3.3) is equivalent to the saddle point problem below......"

……

Time passed minute by minute, and the blackboard that occupied a wall was gradually filled in the blanks in Li Mu's calculations.

The two professors' brows furrowed, apparently lost in thought.

And the graduate students were more and more confused.

At first, they could still understand it, but they couldn't stand Li Mu's fast writing, and it exceeded their thinking speed for a while, and it also made them out of reach.

Why is this actually a Stokesque problem?

Why is that ∇ · gqdx = 0?

Why......

They seem to have 10,000 whys at this point, and even look at GQDX and automatically see it as GDX - dog stuff......

But Li Mu didn't explain it at all, just deduced it there, and probably the two professors were able to keep up with his rhythm.

The graduate students want to cry without tears, why do they want to come to this research group!

Why did they encounter such a fierce man?

In the end, swallowed his tears, and then honestly took out his mobile phone, waited for Li Mu to finish writing and then took a picture, and went back to study it.

In this way, until the entire blackboard was just finished, Li Mu finally put down the chalk.

He patted the chalk dust on his hand, and then he looked up and looked at it again.

There was nothing wrong with the derivation process, and he basically wrote everything he wanted to write.

The mathematical superiority of the mind computer is vividly brought into play in the derivation of this process.

"That's it, I just think that for this kind of nonlinear problem, it should be more effective to calculate the equation in a non-exact but efficient way."

"Especially in CG conjugate gradient algorithms."

While listening to Li Mu's narration, he looked at the full process on the blackboard.

And the board book is also so good, whether it is the font or the overall layout looks very comfortable, there is a sense of computer precision.

Lin Yao and Wu Mengyuan couldn't help but sigh in their hearts at this moment.

What else do they have to say about such students?

Not to mention the method given by Li Mu, which once again solved their problem.

Clean and thorough.

It wasn't until he had completely absorbed all the content that Lin Yao couldn't help but stretch out his hand, and then applauded.

"Very good, very good."

"That's not bad......"

And Wu Mengyuan shook his head, and couldn't help but sigh in his mouth.

The method given by Li Mu is not difficult, and it can even be said that there is no difficult knowledge point in terms of technology, but the victory is in skill.

And if you want to discover this kind of "skill", you can only look at the individual's brain.

Some people may not be able to think of this kind of "coincidence" if they want to do it all their lives.

But for some people, it is extremely easy to come up with such a coincidence.

Obviously, Li Mu belongs to the latter.

Thinking of this, both professors couldn't help but shake their heads.

Such a mind is something that even they want to envy, but they can't envy.

Lin Yao turned his head and looked at his graduate students, wanting them to learn from their younger brothers, but he saw that the faces of these graduate students were still "Who am I?" Where am I? Finally, he shook his head and gave up.

Forget it, the grade is not enough.

Although in the eyes of him and Wu Mengyuan, Li Mu's method is not technically difficult, but it is better than skill.

But for these graduate students, it is very technically difficult and ingenious......

Where's the coincidence?

I can't even see it.

In the end, Wu Mengyuan patted Li Mu's shoulder, turned around and said, "It's okay now, it seems that our group meeting today can end early." ”

"It seems to be the same reason." Lin Yao agreed.

Today's group meeting was originally to discuss this difficult point, but it didn't start long before Li Mu terminated the topic.

There may be more difficulties to overcome in the future, but compared to this problem......

I guess it's going to be a little simpler.

So there was no nonsense, Lin Yao directly announced the end of this group meeting.

But in the past, the graduate students who would leave every time they finished stayed, carefully copied Li Mu's board book on the blackboard, and then began to deduce step by step, and asked Lin Yao if they had any questions, anyway, Lin Yao was their mentor.

For a while, no one in this discussion room left.

As for Li Mu, he was pulled aside by Wu Mengyuan and asked for warmth.

"How's your studies lately?" Wu Mengyuan asked, but after asking, he shook his head, "Forget it, there is probably no need to ask this question." ”

With the ability that Li Mu is showing now, what problems can there be in learning?

So, Wu Mengyuan asked again: "Are there any difficulties in life?" If you have any questions, just tell me and I'll give you some money. ”

Obviously, Li Mu's family is not superior at all, and it is even very ordinary.

This can also be seen from the clothes on Li Mu's body.

If such an excellent student still has difficulties in life, won't it affect the development of other people's natural talents?

Wu Mengyuan didn't want to see such a thing.

And after receiving the professor's concern, Li Mu's heart warmed slightly, waved his hand and said: "Thank you, Professor Wu, I don't have any difficulties, some eat and some study, and there is no shortage of clothes to wear." ”

Wu Mengyuan laughed and said, "That's good, no matter how bad it is, I'll tell Professor Lin Yao to send you your money for this month first." ”

Li Mu is in their research group, and he still has a salary of 3,000 yuan a month.

In fact, with Li Mu's current performance, it is not too high, but there is no way, there are still so many people in their research group to raise.

Li Mu smiled and said, "Don't bother the professor, I'm not so financially tight now." ”

He doesn't have a strong need for money right now, so there's no need to be in such a hurry.

"That's good." Wu Mengyuan nodded, and suddenly said, "Oh, by the way, you seem to be going to participate in our physics competition tomorrow, right?" I remember that if I could get the first place in the international physics competition, the school would reward 10,000 yuan. ”

Li Mu's eyes suddenly lit up.

Retracting that sentence just now, he needs money very much.

After all, that's 10,000 yuan!

Joke!

"I'm going to get this first place!"

Seeing him like this, Wu Mengyuan laughed, "Okay, then I'll wait to give you this reward by hand." ”

Suddenly, a voice came from the side.

"That...... Senior Brother Li, can I ask you a question? ”

Li Mu turned his head to look and saw a graduate student coming to him with a notebook.

The question was a question he had just asked in the process of derivation.

As for why this graduate student took the initiative to ask Li Mu questions......

Take a look at Professor Lin Yao's place, they were already surrounded by several people, probably because they didn't want to wait too long, so they came to find Li Mu.

Wu Mengyuan, who was on the side, nodded approvingly at the graduate student, and it was still very commendable to be able to ask questions without shame.

Of course, Li Mu did not refuse, so he began to explain to the senior.

"We can rephrase it as a linear variational problem of the Lagrangian multiplier λ......"

Li Mu's explanation began, and Wu Mengyuan next to him looked at it, becoming more and more relieved, and at the same time, he also made a decision in his heart.

He wants to provide Li Mu with a perfect college career.

Because it's worth it.

……