The phone was answered almost in seconds, so that Yuan Siping, who was calling, almost didn't react.

And the next moment, Li Mu's voice came from the other side of the phone: "What's wrong?" Did something happen during class? ”

Yuan Siping and the three of them were stunned, but they didn't expect Li Mu to guess what happened immediately.

Does this mean that in Huaguo, which is already evening, Li Mu did not rest immediately, but has been waiting for them to make a call from the beginning of their class?

Thinking of this, they didn't know what to say in their hearts, and their young professor had never forgotten their side.

Of course, no matter how they heard Li Mu's voice, their hearts were also settled, as if they had all been reassured.

With their professors here, there will certainly be no problems.

Subsequently, Yuan Siping immediately briefly informed Li Mu of the problems that Brahms was facing.

After hearing this, Li Mu said helplessly: "Okay, sure enough, this kind of thing still happened. ”

This kind of thing is also very common in his class, and from time to time, some students who are more responsive or have a more agile mind will ask some questions that are in-depth.

With his ability, it is certainly not difficult to deal with these deep problems, and deep problems are not the same as difficult problems.

But if it is replaced by Brahms, there is a problem of depth, and it may be a little difficult.

There was no nonsense, he said: "Turn on the video, then give the phone to Brahms, and I will come and talk to him." ”

"Okay."

Yuan Siping immediately hung up the phone first, and then quickly sent a video call to Li Mu, and after quickly connecting, Yuan Siping got up and walked towards the podium.

At this time, Brahms, who was still racking his brains in his mind and thinking about how to answer those two questions, didn't even notice Yuan Siping coming over for a while, and he didn't come back to his senses until Yuan Siping patted him on the shoulder.

"What's wrong?"

He asked.

Yuan Siping didn't speak, just handed him the mobile phone in his hand.

“听教授的。”

Brahms reacted at this time, and then when he looked down, he saw Li Mu appearing on the screen.

"Teach...... Professor! ”

"You, didn't I tell you that if you have a problem in class, call me immediately." Li Mu shook his head and said helplessly.

"I'm sorry, Professor, but I let you down."

Brahms lowered his head, embarrassed to look at the screen again, although there was a screen between him and the professor, but at this time he still seemed to be able to feel that Li Mu was standing in front of him, his eyes were full of disappointment for him.

Of course, Li Mu didn't blame his students, and said, "Okay, you didn't disappoint me, and it's not a problem. ”

"Now what problem you have, repeat it to me, and then I say, you write."

It was probably Li Mu's gentle tone that made Brahms realize that the professor really didn't blame him, and his emotions were immediately relieved.

"Hmmm! Okay, Professor. ”

He nodded, straightening his back again.

At this time, the students below were a little puzzled, what was going on?

The voices of various discussions rang out.

Of course, according to Brahms's professors just now, they probably guessed that it should be the rescuers.

Their esteemed professor came.

而果然也不出他们所料，勃拉姆斯这个时候也抬起头，看向了他们，然后说道：“抱歉了各位，我的能力不足，难以回答你们提出的问题，耽误了大家的时间，所以接下来，就请我们的教授，来回答刚才的那两个问题了。 ”

At the same time, he also showed the screen of his mobile phone to the students present.

Seeing Li Mu on the screen, the students present cheered.

"Hello Professor!"

"Professor Li!"

Only when they saw Li Mu could they feel that it was worthwhile for them to come to this class.

When Brahms saw this scene, he couldn't help but sigh in his heart, he really deserved to be their professor, as long as he appeared, he could show the same effect as the Dinghai God Needle.

Then, the anxiety in his heart that he had been feeling just now was completely calmed down at this time.

With his own professor behind him, what else does he have to worry about?

There was no nonsense, and then, after Li Mu listened to the question again, he began to answer.

"For the first question, listen to me."

【P(g)(x)~∞Σk=1μ(k)/[Q]……】

This is a very long formula, until finally Li Mu felt that it was a bit troublesome to simply repeat it in words, so he simply took a piece of scratch paper directly from the side, and then directly listed the formula on it, and divided it according to the steps, and finally showed it to Brahms.

In fact, when Brahms saw the first few steps, he already realized how to answer this question.

His eyes were bright, from the previous confusion to the current sudden realization.

And Li Mu also noticed his expression, so he stopped, didn't write down the final steps, and said, "It seems that you should understand." ”

Brahms nodded quickly: "Yes, I already understand. ”

"And what about the second question?" Li Mu asked with a smile again.

Brahms thought for a moment, then finally nodded again, "I understand, too." ”

There is a certain connection between these two questions, so it is not surprising that the first question is followed by the second one.

Li Mu bowed slightly, and said, "Then I'll leave it to you next, you just put your phone aside, and I'll just watch from the side." ”

"Okay professor."

Brahms nodded, then put his phone on the lectern so that Li Mu could see what he was writing on the blackboard.

Then, he stepped forward again, faced the students present, and began to write.

"For the first question, let's first recall what we said earlier, Kq defines the prime number q, first of all, we let m have no square factor, and we define Km as a combination of q|m and the prime number field kq......"

As Brahms began to speak, the students listened attentively again.

When this question was first raised, they didn't particularly care about it, but after thinking about it for a while, they realized the significance of this question, which was of great help to help them understand number theory more deeply, and of course, the relationship between the Langlands program and number theory.

Brahms did not disappoint the students again, and he recounted them smoothly without any pauses.

He himself is a very talented student, and sometimes when facing problems, he is basically only a little bit less guided, so under Li Mu's guidance, it is not surprising that he has achieved this level.

On the screen of the mobile phone, Li Mu listened to Brahms's narration, and a satisfied smile appeared on his face.

In this way, it seems that I can sleep with peace of mind tonight.

He should have been ready to rest a long time ago, after all, there were still a lot of things to be busy every day, but he also counted the time, and this was the time when Brahms took his place in class, so he never slept.

Although he was very relieved before leaving, he still had to worry about it when it really came to this time.

想到这里，李牧的心中不由感慨，不知不觉间，他也要有这种类似于老妈子的心态了啊。

sighed for a moment, and then looked at Brahms's gradually proficient narration, at this time he had already begun to answer the second question, and obviously, he did know how to answer the second question, Li Mu quietly hung up.

It's time to sleep.

And Brahms didn't notice that Li Mu hung up the phone at first, and continued his narration until finally, when the bell rang for the end of class, Brahms also happened to finish the second question.

"Okay, that's the end of this class, thank you for your patience, thank you."

Expressing his sincere gratitude, Brahms bowed to the students.

The students also laughed and said, "Thank you, Mr. Liszt!" ”

Brahms smiled slightly, and only then did he remember the video with Li Mu, he quickly lowered his head and looked at the mobile phone on the podium, and then found that the video had ended, and the mobile phone screen was black.

He was a little puzzled about what he hung up, but then, he didn't think too much about it, and smiled slightly.

Doesn't this also show that the professor is still very relieved of him?

At this time, Yuan Siping and the three of them also came over.

"Awesome, old iron."

Several people patted him on the shoulder and said.

Brahms waved his hand repeatedly: "I'm not good, it's all the professor's help." ”

"Hey, don't be modest, even if you don't care about the next two questions, what you said earlier is pretty good."

Alex didn't give his middle finger this time, but gave Brahms a thumbs up.

Tu Zhizhen and Yuan Siping also nodded approvingly.

"One thing to say, after listening to your class, I feel that I have some ideas about Artin's conjecture." Tu Zhizhen said.

"Coincidentally, so did I." Alex also nodded, "My paper is about to be written, maybe, after this is done, I may try it in this direction." ”

"Huh? I'm almost done with my dissertation. Brahms said.

"Me too." Tu Zhizhen nodded.

Then the three of them turned their gazes to Yuan Siping in unison.

Yuan Siping: "??? Look at what I'm doing. ”

他到现在还在研究着李牧的那篇《维度力对电磁相互作用力的共轭模型》呢，按照李牧所说的，这篇论文能够帮助他的那个课题，而经过了这么久的研究，他也确实发现了这一点。

This paper can really help him in this way.

But there are still some difficulties in really completing his project.

"Oh, you're in math and physics, so that's fine."

Tu Zhizhen also reacted, then waved his hand, and then looked at Alex and Brahms: "So, perhaps...... When we have all finished our papers, we can work together to set the Artin conjecture as the next common goal? ”

Alex thought for a moment, then nodded heavily and said, "I agree." ”

Brahms also bowed his head and said, "I agree." ”

The three of them glanced at each other, and they all saw the determination in each other's eyes.

"Then it's settled, and when the professor comes back, we'll talk to him about it."

"Okay."

The three of them all nodded, and they also folded their hands together very tacitly, giving each other cheering eyes.

The three young students decide to challenge the Artin conjecture, a very important conjecture in the Langlands program, which may attract a lot of jokes if it is said.

It has been almost a hundred years since the Atin conjecture was proposed, but it has not been solved, and because of the later proposal of the Langlands program, the status of the Atin conjecture in the mathematical community has been further improved.

Can such a difficult problem be solved by three young people?

But if their mentor had been told, the jokes would have gone away.

With such a strong mentor to guide them, maybe they can really do it?

当然，他们三个人，可并没有想过要借李牧的指导来完成这个目标。

Regardless, their talents, among other math peers, are definitely among the best.

Therefore, even though they knew that this problem was very difficult, they still chose to move forward.

Of course, Yuan Siping, who is the fourth, felt the persecution of a future great physicist from mathematics.

The joys and sorrows of human beings are not the same, he only thinks that these three guys are noisy.

Standing next to him with a sad face, Yuan Siping drew a circle, and finally, "Damn, I'm going back to continue studying my thesis!" ”

……

Time flies.

After more than two weeks, Li Mu finally completed all the purposes of this trip back to China.

During this time, he also went back to his hometown, met his parents, and told them about the Nobel Prize dinner.

In this regard, what else can Father and Mother Li say?

Of course, it was a series of promises, plus showing off a dragon with friends and family.

Of course, Li Mu's grandparents also went together, the two old people have been hearing about the Nobel Prize since that era, and now that their grandson has also won the award, of course, they have to go.

However, when it was time to leave, he had to leave, and when he had done everything, he set out again on his voyage back to Oxford.

……

October 25th.

Pushing open the office door, inside, four students were seriously studying their questions.

After seeing Li Mu, the four of them were all dazzled, and they shouted one after another: "Professor! You're back! ”

李牧笑着道：“我回来了，这两个周，你们学习的怎么样？ ”

When this question was mentioned, Alex, Brahms, and Tu Zhizhen said, "Professor, my thesis has been completed. ”

"Oh? Very good. Li Mu nodded: "Then let me take a look." ”

I didn't expect to receive such a surprise as soon as I came back, and he didn't talk nonsense, returned to his desk, took the papers handed by the three people one by one, and began to read them.

Yuan Siping is the only one in the office who is still studying his topic.

Li Mu read the paper very quickly, and it took about 10 minutes to read a person's paper, and soon, he said with a smile: "Very good, your papers have been completed very successfully, and now you are ready to submit to the journal." ”

"Yay!"

All three jumped for joy.

Li Mu smiled and continued: "As for what journal to submit to, I will give you some recommendations later, and you can choose from your own ideas when the time comes." ”

"But now I also need to ask you, what direction do you plan to do next?"

The three of them stopped celebrating, then glanced at each other, and said to Li Mu together: "Atin conjecture." ”

Hearing the three people's answers in unison, Li Mu was stunned for a moment, and then reacted, it seems that the three of them have already discussed.

But after a moment of thought, he nodded, "Very good, it's nice to see that you guys can dare to challenge difficult problems." ”

"Then, Artin's conjecture will be your next common goal."

"If you can really do it, then ...... I will apply for graduation for you. ”

(End of chapter)