The next day, it arrived as scheduled.

The news that Li Mu is going to hold a public lecture at St. Petersburg State University has already been spread, and the report he made is based on the theme of the existence and smoothness of the solution of the NS equation that he has only proved for a long time, and then he will explain it in more detail.

Such an open class naturally attracted the attention of other mathematicians.

Most of these mathematicians have attended the International Congress of Mathematicians, but they have not yet returned, and they are still staying here, after all, strictly speaking, it is now July, which is still the summer vacation, and there is no such hurry for those mathematics professors who teach at universities.

As a result, they are now pleasantly surprised that they did not expect to have such benefits for staying.

Although Li Mu was detailed enough in the report, if they could be more detailed, they would naturally be quite willing.

As a result, Li Mu's open class attracted a large number of mathematicians to participate.

As an open class, the class is not held in any classroom, but in the auditorium of St. Petersburg State University.

作为普遍信仰东正教的国家，这个豪华的大礼堂也十分有宗教的风格，当然，也十分的豪华就是了。

And even for the students here, every time they come to the auditorium, they will feel different.

"It's hard to believe that Li Mu's public class was actually held in the auditorium, it's really incredible, the school is willing to open the auditorium for him!"

In the auditorium, the students of the Faculty of Mathematics of St. Petersburg State University had almost arrived, and they couldn't help but marvel at the grand scene in the auditorium.

"Of course, after all, it was Professor Li Mu, who solved the most difficult mathematical problem in the NS equation, and he was willing to come to our school to hold an open class, which can be regarded as our luck."

Some students couldn't help but say at this time: "But, will we really be able to understand it then?" I've only studied fluid mechanics a little bit. ”

"Hey, it doesn't matter if you understand it or not, it's mainly to meet Professor Li with your own eyes." Another student shrugged his shoulders and said nonchalantly, "I haven't even studied fluid mechanics, it's an elective course, and I haven't studied it at all." ”

When their school advertised this open class, it also asked students from the mathematics department and physics department to sign up at will, not to choose a certain class, but to have enough seats in the auditorium to sit down.

So they didn't understand it or not, so they all signed up, after all, this is the only true God class in the mathematics world of this era.

"I've heard that there will be a lot of other well-known mathematicians coming today, but I don't know which ones will come."

A student looked at the entrance of the auditorium and said curiously, and suddenly at this moment, he exclaimed, "What did I see?" Is that...... Professor Perelman? ”

His words immediately attracted the attention of the other students around him, and for a moment, their eyes fell on the location of the entrance, and then, their eyes widened.

That trademark beard, and that face......

At St. Petersburg State University, students of the Faculty of Mathematics are simply too familiar.

This is their former senior, the pride of their school, the first certifier of the seven problems of the millennium, even if it is Li Mu, the second-of-course, considering Li Mu's age, this is also inevitable, after all, when Perelman proved Poincaré's conjecture, Li Mu was only two or three years old.

It's just that Perelman's entry, although it also caused an uproar and surprise to the people present at the beginning, but they also quickly remembered Perelman's temper, so they also tried not to pay attention to him as much as possible, so as not to arouse his disgust.

And this is the most important thing for Perelman, he was invited by Li Mu, but also for his further explanation of the NS equation, although he was ready to be watched by everyone, but he was pleased that his coming did not attract too much attention.

What he doesn't like is the feeling of being talked about by too many people, and he just wants to be one of the many people.

Bolognikov saw his old friend return to his homeland once again, although even in normal times, the distance between this homeland and Perelman was only about ten kilometers.

His eyes were a little red, and Bolonnikov punched him when he went up: "I told you to come back, but you didn't come back, Li Mu asked you to come back, and you came back?" ”

Perelman smiled when he saw his old friend, and then said, "If you can prove the existence and smoothness of the solution of the NS equation, then I must have come back a long time ago." ”

Bolognikov was silent for a moment, and then said angrily: "You just say that you don't want to come back, forget it, prove the problem...... How much do you think of me? ”

Both laughed.

Later, Bolognikov also took Perelman to the first row and sat down.

Those sitting in the first row were basically old acquaintances of Perelman, who greeted him and welcomed him back.

However, people also tacitly did not talk about him too much.

In this way, time passed quickly, until finally, the time of the open class also officially began.

Li Mu's figure also walked out of the backstage lounge, looking at the auditorium in front of him that was almost crowded with people, he also sighed, although Russia is vast and sparsely populated, but there are no less students studying mathematics.

Of course, the audience also included physics students, after all, the NS equation and fluid mechanics are indeed things in classical physics, although the mathematics department also specializes in this problem.

Shaking his head, he didn't think much about it, and then he said: "It's an honor to be invited by St. Petersburg State University to come here for a public lecture. ”

"St. Petersburg State University is a very old university, and from here came many famous people that I once admired, such as Leonhard Euler, the master of mathematics in the 18th century, and Euler is a grandfather to all our modern mathematicians."

"Another example is Mr. Chebyshev, who has also made a great contribution to our mathematics."

"Including the current president of Russia, Mr. President, also came out of here - Mr. President is also a very charismatic person."

"Therefore, I also believe that every student here has the same great potential."

"Then, I also hope that my next course can add a boost to your journey towards greatness." Li Mu smiled slightly: "This class will start from here." ”

Since I was invited to come to someone's school to give a speech, the first thing that was inevitable was of course to boast about it in business.

And with the boast finished, he turned around and walked to a small blackboard that had been pushed up, and the public class officially began.

Since the topic of his lecture is related to the existence and smoothness of the solution of the NS equation that he has demonstrated, the content of the class is naturally mainly about this aspect.

However, there are two groups of people who serve this class, one group is the vast majority of students in the auditorium, who are the main service objects of this class, and the other group is those mathematicians who have heard the news, such as Perelman.

Perelman was invited by Li Mu, and people also heard that he was going to talk about something related to the NS equation, so they came here.

And if what he talks about is only at the level of students, then it is obviously not good.

So how can we make the student group think at the same time, but also increase the understanding of the group of mathematicians?

On this point, it is full of difficulty.

However, for Li Mu, the difficulty of the challenge is also interesting.

随着课堂的开始，李牧也充分地发挥出了他在教学上的极高能力。

All the students present do not even need to study fluid mechanics, as long as they have an understanding of partial differential equations, they can understand the NS equation through his explanation, and gradually understand Li Mu's proof.

Solving partial differential equations is a research direction of partial differential equations, and proving the existence of partial differential equation solutions also belongs to a research direction.

Li Mu's class can be regarded as a class of partial differential equations for them, and in the process, it can also cause them to think about why Professor Li has to come out like this at this step and deal with it like that at that step.

And Perelman, these mathematicians, Li Mu's steps in this class to guide students to think, for them, can deepen their understanding of Li Mu's proof process.

Therefore, it can be said that Li Mu's public class successfully took care of two groups at the same time.

Until an hour later, the end of the class.

"So, that's all for this open class."

"I hope everyone here can gain something."

Behind him was a small blackboard full of various styles, Li Mu stood at the front of the podium, facing everyone, and then bowed slightly.

Everyone present suddenly woke up like a dream, and then there was a warm applause, which resounded throughout the auditorium.

"It's over!"

Dean Bolognikov had a look of surprise on his face, "How do I feel that it's only been half an hour?" ”

Next to him, Cherobavsky, the dean of the School of Physics, sighed: "I really didn't expect that Professor Li not only has a very high talent in academics, but he is even so good in class." ”

"yes, what he said, I thought it sounded very inspiring, and he had something else that would be very suitable for undergraduate and graduate students...... What an amazing person. On the other hand, their math professor said the same.

Everyone was amazed.

A good scholar is not necessarily a good teacher.

Although the vast majority of scholars will hold the position of teacher or professor and will give lectures to students, this does not mean that they are good enough to give lectures.

Therefore, there is a difference between great educators and university scholars.

And now it seems that Li Mu is not only a university scholar, but also has the potential to become a great educator.

This made Bolonikov and others, who are also scholars and educators, feel very envious.

"Perelman, what do you think? You don't regret coming to this class, do you? Bolonnikov also turned to Perelman on the side.

Perelman lowered his head and pondered for a long time, until finally, he raised his head and nodded, "Yes, this is a very wonderful lesson. ”

……

李牧的这节公开课结束了，整节公开课的视频，也被完整地公布到了网络上。

As soon as the video was announced, it attracted as many as thousands, or even nearly 10,000 downloads.

The people who downloaded this open course were also divided into several groups.

The first group is mathematicians from all over the world, especially those who study partial differential equations and Neville-Stokes equations, many of whom attended the International Congress of Mathematicians and then left St. Petersburg before Li Mu's public lecture began.

The second group is naturally the students, after all, the students of St. Petersburg State University said that they were good after listening to the lectures, and for those who are interested and more motivated, they are naturally even more reluctant to miss it.

In addition to these two groups, there is a third group, that is, those professors and teachers, who want to learn from Li Mu about the way of class, especially Li Mu's open class, which can not only make students gain a lot, but also those mathematicians present, which is certainly worth learning for their teachers.

But helplessly, after watching Li Mu's full video, they could only choose to give up, because such a class must be supported by mathematical ability like Li Mu's, without his mathematical ability, it is completely impossible to achieve his effect by simplifying the complex.

In a word, those who learn from me live, and those who resemble me die.

That's it.

……

"You're leaving?"

"yes, it's time to go."

At the door of the hotel, Li Mu, who was leaving St. Petersburg today, ushered in the farewell of everyone.

The people who came to see him off were basically people from St. Petersburg State University.

Bolognikov said helplessly: "Although I know that it is probably impossible, I still want to say that St. Petersburg State University will always welcome you to join." ”

Li Mu smiled and said, "Thank you." ”

"Of course, although you can't officially join now, I don't think you should turn down the position of tenured honorary professor, right?"

Suddenly, Bolognikov received another letter of appointment from the side, which was about St. Petersburg State University's appointment of him as a tenured honorary professor of the university.

Li Mu was stunned for a moment, and then laughed: "Of course, this is also my honor." ”

"That's great!" Bolonnikov smiled and nodded, and then handed the letter of appointment in his hand to Li Mu.

Of course, it is indispensable to have someone take a photo with them.

"Alright, I wish you a nice trip."

After the group photo, Bolonikov and Li Mu solemnly shook hands and sent their last blessings.

"Oh, by the way, Perelman didn't come today, but he asked me to say goodbye to you by the way, and by the way, I have good news for you, after watching your public class, he has regained his interest in class, just like he used to, and he is also very keen to help his classmates and friends with their math studies."

"Even I used to get his help."

Bolognikov smiled: "So, he already plans to return to school occasionally to teach the students a lesson." ”

Hearing this news, Li Mu also showed a heartfelt smile on his face: "This is great news for the mathematical community. ”

……

Perelman's willingness to restart classes is probably also due to the fact that he has not received too much attention from his return to school, which makes him no longer feel awkward.

After all, he still likes to discuss mathematics with others and share his results with others, just as he once put his proof of Poincaré's conjecture on the website, and took the initiative to send emails to a dozen mathematicians he knew, asking them to read his papers.

So, of course, this is good news for the mathematical community.

On the other hand, there is also good news for thrombosis patients.

When Li Mu's plane landed at Oxford Airport, he received a call from China.

Kingsley Weir, for whom there is great news.

"Boss! Our RSCA antithrombotic drug has passed the phase III clinical trial! ”

(End of chapter)