I Don’t Want to Win Lying Down

Department of Mathematics, Peking University,

As one of the best universities in the country for mathematics majors, there are countless so-called mathematics geniuses in this department. If this department is only ranked second, then no university’s mathematics department dares to say that it is the first. It’s so awesome The presence.

Two hundred undergraduates are recruited here every day, half of them are recommended by competitions, and almost all the contestants who have won international and domestic mathematics olympiad gold medals are here, and it is also known as the head of the four lunatic departments.

Apart from the geniuses who were originally in the Department of Mathematics, there are also many students from other majors, such as the Department of Computer Science, Economics, Physics, etc., who are outstanding in their respective departments, from time to time to the Department of Mathematics for related studies.

The students who study here are divided into four classes according to the competition recommended students and the college entrance examination students. It can be said...the competition is very strong, and the pressure here is huge, but as long as he can carry it here, then he is not ordinary people.

It is also because of this reason that geniuses and masters gather, almost all of whom are concentrating on studying hard. After graduation, the vast majority of students will choose to go abroad to continue their studies, and then...only 20% of them come back .

Five hundred people go out every year, and less than a hundred people come back. After obtaining a doctorate abroad, many of them choose to stay and work. The company holds important positions.

For example, mathematical principles play a pivotal role in price models, statistical analysis, wealth management products, and optimal investment portfolios. It is normal for Chinese people to be good at mathematics, but it is not Hua people who are good at mathematics.

However...

at this very moment,

The Department of Mathematics of Peking University encountered a big trouble. Almost everyone in the department was trapped to death. This problem happened only five minutes ago...Professor Zhang Yaying is a professor of the Department of Mathematics of Peking University and also a member of the Department of Science and Technology. Academy of Academicians.

He serves as the injection of international mathematics research institutions, the director of the mathematics development laboratory, the director of the mathematics association, the editor-in-chief of seven top domestic and foreign journals, and has made contact contributions to Riemannian manifolds and Z functions. In general...he is Hua Guo The limits of mathematics.

There should be nothing wrong, but...Zhang Yaying received a call from Xiao Sun, the head coach in charge of training the national team for the mathematics competition. Associate Professor Sun explained the current problems to Zhang Yaying.

Academician Zhang...

We can't even read the problem...it seems to be a physical phenomenon,

But it needs to be expressed in non-Euclidean geometry. Associate Professor Sun smiled wryly and said, By the way...Academician Xu Mang is in our training base. He had this problem and asked us to solve it within four hours, and he was free to seek help from anyone.

Xu Mang?

Yes...he is the consultant of the national team for this mathematics competition. Zhang Yaying said helplessly: What is the problem, please send me a photo and I will show you...is it really so difficult? Can’t even read it? That’s a bit of an exaggeration.”

No no no!

Academician Zhang...Academician Xu Mang is not an ordinary person! Associate Professor Sun said seriously: You think he won the Nobel Prize in Physics at such a young age, I think this year's Nobel Prize in Physics should also be him, after John After Bardeen and Fred Sanger, the third consecutive person to win this honor in the same field.

It can be seen how powerful he is, and his research results are all based on theory, relying on mathematical calculations... Associate Professor Sun explained: It can be seen how powerful Academician Xu Mang is in mathematics, but...I asked him, Why not study mathematics.

...

Everyone knows this. He doesn't like mathematics. He was forced to learn mathematics just because theoretical physics requires mathematics. Zhang Yaying said with a smile: I was quite angry when I heard this kind of words... Now that I think about it Xu Mang's.

actually...

There is a deeper reason. Associate Professor Sun said: According to Academician Xu Mang's explanation, it was all because his wife was holding a kitchen knife on his neck at the time... He had to participate in the so-called competition with him , yet forced to learn mathematics.”

...

That...forget it. Zhang Yaying said hastily: Send over your question, and I'll study it.

hang up the phone,

less than thirty seconds,

Zhang Yaying received an email with a picture attached, but after a quick glance, she didn't find it difficult, but when she officially entered the solution process, she realized how hasty the previous glance was.

this question...

It's not easy!

It is not understandable at first glance, and many issues need to be considered... In short, it is to describe physical phenomena into precise mathematical equations.

this...

Is this too much for college students? Zhang Yaying frowned, full of doubts about this question. Its difficulty far exceeds the scope that those contestants can solve, and it is more inclined to practical application.

but...

Since Xu Mang said that he can find anyone to solve it, is he challenging the Department of Mathematics of Peking University?

for a while,

Zhang Yaying ignited a fighting spirit and hadn't competed with others for a long time. When he was studying, his favorite thing was to find someone to compete with. Now that he was in this position, he didn't even have the opportunity to compete with others, but Xu Mang gave him such a chance.

soon,

This flame of fighting spirit is a little dimmed,

It's so hard...

Hello?

Old Yi!

I have a problem where physics is now described as a mathematical equation, let's solve it together! Zhang Yaying said: Please help me find out what kind of physical phenomenon this is. It seems to be a problem of extreme space-time curve description.

Well?

Have you studied physics? The other party said with a smile: Show me!

moment,

This old Yi called Zhang Yaying back with a very serious tone.

Old Zhang!

Who are you helping to solve this problem? Lao Yi asked: This problem is not ordinary...From the point of view of understanding, it involves the concept of four-dimensional space-time...and it has a shape...This... The other party is not an ordinary person, right?

...

It's Xu Mang.

He was at the mathematics competition training base, and then he gave such a problem to the contestants, and he solved it within four hours, and at the same time asked anyone to help. Zhang Yaying said helplessly: I think this is a challenge to us.

he?

He asked your contestants to solve this problem? Lao Yi said confusedly: This is obviously aimed at your mathematics department!

In that case...

Then I can't help anymore! Lao Yi showed a smile: But I can't solve it, you can find a way yourself, this has completely divorced from physics, it is a purely mathematical problem, very pure...so pure No knowledge of physics is required.

hang up the phone,

Zhang Yaying fell into silence. If he was given a few days, he might be able to solve it, but it is only four hours, so harsh that he cannot speak, it is very unfair... unless the equation of this problem is extremely simple.

is it possible?

The question Xu Mang gave couldn't be addition, subtraction, multiplication and division.

soon,

Zhang Yaying found several other professors in the Department of Mathematics to study this problem together. However, after half an hour, the conclusion was that it could not be completed in a short time. It would take at least two weeks or even use a computer.

Academician Xu Mang has created a problem for our Department of Mathematics! A certain professor sighed, He has been thinking of doing this for a long time, right?

he...

It's hard to say... Although there is no intersection, but I heard from other people that Academician Xu Mang is quite strange. Another professor said: He seems easy-going, but he is very stubborn and has a bad temper. Listen Said that he rejected many preferential policies for him.

He has the capital to refuse. Zhang Yaying opened his mouth and said: Won the Nobel Prize in Natural Science at such a young age, and it is the first natural science prize in our country, plus his age... I still can't see His height, because now is just the beginning.

alright!

Let's continue! Zhang Yaying said solemnly: Our Department of Mathematics at Peking University is number one in the country, and we cannot be defeated by a physics student.

At this time,

I don't know who leaked this problem. The students in the entire mathematics department have fallen into a crazy stage because of this problem. After all, it was proposed by Xu Mang. If anyone can solve it, then this person will definitely be among the experts. Stand out in the Department of Mathematics.

Many people took this opportunity as a stepping stone to their own success, but unfortunately... they overestimated their own strength, and at the same time underestimated Xu Mang's bitch attributes. Facing this temporarily unsolvable problem, many people collapsed up.

The former Four Great Talents were already far away in the United States, and the current Four Great Talents, except for two who entered the national team for the math competition, the other two were sitting together in the library, solving math problems provided by Xu Mang.

And the collaboration of these two people has attracted the attention of many students. Although the so-called four great talents are a kind of joking name of everyone, they don't have the corresponding strength, and even the joking names are mixed up. These four people almost represent Beijing. The highest level of knowledge in the Department of Mathematics.

but...

The two were already in despair at the training base, and the other two were not much better. They couldn't find a solution even after hard thinking and meditation. Although they understood the physical phenomenon, they...couldn't describe it.

this day,

The Department of Mathematics of Peking University experienced the darkest four hours, and no one knew what to do next.

And in Fuda,

Xu Mang's alma mater,

Fuda Mathematics Department was the second largest in the country, but their performance was mediocre. After knowing that Xu Mang had provided such a problem, almost no one could not think hard enough to solve him. The legend of Xu Mang was still circulating in the school.

Director Ouyang Fei looked at a question on his computer screen with a helpless smile on his face. Xu Mang... was so messed up, what was he thinking?

this day,

these four hours,

Everyone is thinking about a question.

How to solve it?

 …