Great Country Academician

Beijing, mid to late January.

As time goes by, this city full of ancient charm continues to welcome flights from all over the world.

There was a constant flow of people coming and going, but something different from usual was that the lively atmosphere had some academic atmosphere.

With five students, Xu Chuan took the high-speed train and came here again.

He was urged here by Mr. Qiu.

The old man was probably afraid that Xu Chuan would forget to release pigeons from the mathematics world at the International Symposium on the History of Mathematics and Mathematics Education, so he started calling him a few days in advance to ask when he would come.

Although I understand Mr. Qiu's feelings, does he seem like the kind of person who would let others go?

Obviously not.

So Xu Chuan chose to bring all five students to the capital to have a good reputation and see the world.

In fact, give me more to eat at the party! Eat poor Mizuki University!

It was the first time that the instructor took him to participate in such a high-level seminar. The students were like tails, nervously following Xu Chuan. They were students who had never seen the world.

Xu Chuan didn't care and followed the invitation letter to the hotel where he would stay for the seminar.

It has to be said that as the two top universities in China, Shuimu University is really well-funded.

Perhaps in order to showcase the charm and history of China in front of mathematicians around the world, the accommodation hotel provided for the participating mathematicians at the 'International Symposium on the History of Mathematics and Mathematics Education' is the top Summer Palace hotel. Man Hotel.

The most unique thing about this hotel is that it is not in the form of a high-rise building, but in the form of an ancient courtyard house.

Entering this hotel, even Xu Chuan felt a little emotional, how rich he is.

Not to mention the few students who came with him to see the world, they were immediately shocked.

Following his tutor, Cai Peng couldn't help but be speechless as he looked at the luxurious courtyard house. He asked curiously: "Professor, do you usually stay in places like this when you travel on business?"

Beside him, the other four friends raised their ears and listened curiously.

Xu Chuan shrugged and said, "To be honest, this is my first time living in a courtyard house like this."

After a pause, just as he was about to add another sentence, out of the corner of his eye, an old man in a windbreaker dragging his luggage came in from the gate of the courtyard.

Stopping the words in his mouth, he walked over quickly and greeted with a smile: "Teacher, I didn't expect you to come too."

Hearing the sound, Deligne, who was dragging his suitcase, stopped and raised his head. When he saw the familiar person in front of him, a rare smile appeared on his face: "Long time no see."

Xu Chuan nodded, took the luggage for Deligne, and said with a smile, "Yes, it's been two years."

Looking at the still young student in front of him, Deligne sighed with emotion: "I heard that Qiu Chengtong brought many old friends to this meeting, so I came over to take a look."

"And to be able to leave something for the mathematics community in the later years of my life, this is what I should do."

Xu Chuan smiled and said: "Knowledge is never old or new. Even methods that have been replaced once sparkled in the history of civilization. It carries the dream of civilization and is a wealth worth remembering by everyone."

After a slight pause, he continued: "And the old method sometimes has new uses. If you change the field, maybe it can shine again."

Hearing this, Deligne glanced at him curiously: "Are you planning to present something at this report meeting?"

He knew the student well, and if he hadn't found something, he probably wouldn't have said that.

Perhaps, there is something interesting to see at this seminar? .

Xu Chuan smiled mysteriously, and said, "I will have a half-hour exchange report for this seminar, and you will know when the time comes."

Hearing this, Deligne nodded and did not ask any further questions.

It was just one day, he could afford to wait.

January 20th.

In the auditorium of Shuimu University, the first "International Symposium on History of Mathematics and Mathematics Education" kicked off.

Before nine o'clock, the auditorium of Shuimu University was already crowded with people.

When he came to the venue, Xu Chuan walked through the crowd and found his seat according to the instructions.

To his surprise, another old man in a woolen sweater sat beside him.

"I didn't expect you, the instructor, to come over. Isn't CERN busy?"

Looking at the familiar old man, Xu Chuan was a little surprised.

Sitting next to him was another professor of his at Princeton, Edward Witten.

If Professor Deligne's arrival was still expected, then Witten's arrival really caught him by surprise.

Upon hearing Xu Chuan's inquiry, Edward Witten smiled and said with a bit of ridicule: "Although the outside world regards me as a physicist, I am an authentic Fields Medal winner with a medal. That kind of thing."

"If I am not qualified to participate in this seminar, I can't think of anyone who is more qualified."

Hearing this, Xu Chuan couldn't help coughing. He almost forgot that his mentor was the first physicist to win the Fields Medal.

I was accidentally tricked by him.

But that said, it’s true.

After all, if even the Fields Medal winners cannot attend, more than 99% of the people in this auditorium may have to withdraw.

After coughing dryly, Xu Chuan sat down and chatted with Witten while waiting for the report meeting to begin.

At half past nine, the first ‘International Symposium on History of Mathematics and Mathematics Education’ officially kicked off in the auditorium of Shuimu University.

First, the organizer of the seminar, Shuimu University, gave a brief report on the normal meeting process.

Immediately afterwards, Chairman Xi of the International Mathematical Union IMU came to the stage to give a speech. He made a detailed speech on research topics such as "the history of ancient and modern mathematics", "communication and dissemination of mathematics", "mathematics education and mathematics culture", and called on all countries in the world to cooperate with the mathematics community. Protect, disseminate, develop and promote mathematical culture.

Then, the staff of the Huaguo government came to the stage to give a report at the seminar, saying that Huaguo will make a contribution to better promote the research of mathematics culture, promote the development of mathematics, spread mathematics culture, and lead the direction of mathematics development.

There wasn’t much good to see in the morning report.

The highlight was the exchange meeting in the afternoon.

Shuimu University provides three lecture halls to provide different exchanges for scholars who come to participate in the seminar.

Xu Chuan didn't wait for a long time. After the afternoon exchange meeting started, the second report in Lecture Hall No. 1 was his time, which took about half an hour.

Because of the regulations, Lecture Hall No. 1 was already full of people around three o'clock in the afternoon, and even some mathematicians who came to the conference sat directly in the aisle because they couldn't find a seat.

When Xu Chuan walked into the lecture hall, seeing this crowded scene, he couldn't help but wonder if all the scholars who came to participate in the seminar this time were crowded.

After all, this number of people is too exaggerated.

Fortunately, he was also someone who had seen big scenes. Although he was a little surprised, he walked to the podium calmly.

After trying the microphone and confirming that there was no problem, he glanced around the lecture hall and saw many familiar people.

Smiling, he said slowly: "I welcome all the scholars who came from afar to participate in the seminar today. Today's exchange meeting is a very meaningful event in my opinion."

"Of course, I don't need to repeat those words about the protection and development of mathematics, because I believe that those who can come here today are all passionate about mathematics."

"To be honest, the report I gave today is not from the perspective of pure mathematics. The content of my report is more about the application of mathematics and its complementary physics."

"Perhaps some people may not understand today's report, but I believe it will be worthwhile and will not waste your energy and time."

Listening to Xu Chuan's words, there was a slight commotion in the lecture hall.

Edward Witten, who was sitting in the front row, raised his eyebrows in surprise after hearing these words.

This is probably the first time anyone has brought physics to a mathematics seminar.

After thinking about it, he turned slightly sideways and looked at Deligne sitting next to him, and asked: "Do you know what he is going to report today?"

Deligne shook his head and said, "I don't know."

After a slight pause, he remembered his unexpected encounter with the student yesterday and added: "But I'm looking forward to it."

Xu Chuan didn't care about the commotion in the audience, he continued: "After thousands of years of development, the ancient subject of mathematics has developed many branches in the past 100 years, and produced many applied disciplines."

"But looking back at history, the development of mathematics often benefits from the problems raised by physics, and every major revolution in physics is often accompanied by the introduction of new mathematics."

“The two complement each other.”

"And some time ago, when I was researching some problems, I made some new discoveries by accident. Today, I will share these results to add color to this seminar."

"Of course, it will be more biased towards the field of mathematical physics, and scholars who are not in this field may be a little difficult to understand, but I will try my best to use the most concise words to report."

As he spoke, he turned on the projector behind him.

A silver-white curtain slowly fell vertically.

After waiting for a few seconds, a gentle white light lit up on the curtain, and a clear title appeared on the silver-white curtain.

[The mathematical theory of non-equilibrium strongly correlated electron systems and the calculation method of a specific correlation type! 】

A line of black block letters jumped into everyone's eyes.

Of course, considering that most of the scholars present are international scholars, there is also a line of English under the printed Chinese characters.

When the clear title on the silver-white curtain came into the eyes of Professor Witten sitting in the front row, his brown and black pupils shrank sharply, and he couldn't help but exclaimed in a low voice:

"Mathematical theory of non-equilibrium strongly correlated systems, how is this possible?"

On the side, Professor Deligne, who was sitting next to him, noticed his movement, turned his head and looked over, and asked curiously: "What's wrong?"

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