Chapter 58

The 58th International Olympiad will be held on March 6 in Yingguo.

A total of 102 countries and regions from all over the world participated in this year's IMO.

Huaguo has always been a strong country in the IMO arena.

Although the performance in recent years has not been satisfactory, it has never fallen out of the top three.

And this time, the Huaguo team has only one goal, and that is to win the championship!

No matter from any point of view, this championship, the Huaguo team must win!

In addition to Gu Lu and the seven members of the national team, the Chinese Mathematical Society also equipped the national team with a team doctor and nutritionist.

In order to avoid other external factors, the performance of the players on the field is affected.

As for the translation, with Gu Lu here, there is no need to add one more person.

On March 2, everyone in the Huaguo team boarded a plane from the magic capital to London.

In the evening, a group of ten people arrived in London.

The IMO competition takes place on the campus of Imperial College London in London.

As the host, Yingguo has already prepared hotels for the participating countries, and at the same time comes with a pick-up service.

Therefore, as soon as everyone got off the plane, a tall white man dressed as a gentleman walked straight to Gu Lu.

"Is it Mr. Gu Lu from Huaguo?"

"Well, we are. Gu Lu nodded, pointed to the people behind him, and spoke fluent English, "We are the Chinese team that came to participate in the IMO competition." ”

"Please, we'll take you to the hotel first. The man led the crowd and said, "The hotel is near Imperial College London, and the neighborhood is bustling. If you are interested, I can be a guide and show you around. ”

Gu Lu waved his hand, "No need." ”

With four days to go, the race is running out of the game.

Moreover, it is necessary to let the players of the Huaguo team hurry up and reverse the time difference, and there is no extra time at all.

Go shopping, or wait until the competition is over!

All the way to the hotel, seeing that everyone's faces were full of sleepiness, Gu Lu didn't say anything more, and directly asked everyone to rest quickly.

Gu Lu, on the other hand, took advantage of the night to sneak into Imperial College London and go straight to the library.

"Classmate, can I borrow your library card?" Gu Lu stopped a blonde female classmate who had just come out of the library.

"Are you ......" The female classmate raised her head, just about to say something to refuse, but when she caught a glimpse of Gu Lu's face, she swallowed the words that were about to be spoken.

Instead, he smiled softly, "Okay!"

Gu Lu's handsomeness has crossed races.

From the perspective of Western people's aesthetic concepts, Gu Lu, a typical Oriental face, can still capture a large number of rich girls.

With his library card in hand, Gu Lu walked smoothly into the library of Imperial College London.

Coming to the math section, Gu Lu searched for a while on the bookshelf before finding the book he wanted.

"An Introduction to the Theory of Numbers", a report on the theory of numbers in Chinese.

Gu Lu read this book during his time at Princeton, and many of the contents in it are of great help to Gu Lu's current work on the proof of the Cohen-Lenstra conjecture.

But there are some contents that Gu Lu can't remember clearly, and the publishing house that originally published the book has gone out of business, which means that it can't be bought in the outside world.

Only in the libraries of some foreign universities does the book survive.

Originally, Gu Lu was just going to try his luck, but he didn't expect to really find it.

Gu Lu blew the dust on the cover, opened the somewhat yellowed pages, and searched for the content he needed in the book.

"Gu Lu?!"

But at this moment, there was a sound of surprise behind Gu Lu.

Gu Lu turned his head to look, and the person who called him his name was a Chinese man in an ordinary plaid shirt, frowning and thinking for a while, Gu Lu remembered who this was, "Are you...... Zhao Yi!"

Zhao Yi is barely Gu Lu's college classmate.

When he and Gu Lu entered the school in the same year, they both belonged to the 2013 class of students in the Department of Mathematics of Peking University.

However, because Gu Lu completed the four-year college course in two years, Gu Lu directly applied for those basic courses in the freshman year, and only had to take the final exam.

Therefore, there is very little intersection with Zhao Yi.

"Yes, yes, Gu Shen, it's me. Seeing that Gu Lu recognized himself, Zhao Yi nodded excitedly.

After all, this is a legendary figure on campus!

"Gu Shen, you ...... Why is it here?"

Gu Shen is the nickname given to Gu Lu by his classmates in the school.

Gu Lu shook the book in his hand, "Come and borrow a book, you can't buy it outside." ”

Zhao Yi looked at Gu Lu, thought about his current difficult situation again, gritted his teeth, and spoke, "Gu ...... Gu Shen, can I ask you a favor?"

"Help?" Gu Lu raised his eyebrows, "Tell me about it." ”

"I was working on my master's thesis recently, but ...... Ran into some trouble. Zhao Yi hesitated.

"What about your mentor?"

"It's a business trip,......," Zhao Yi replied weakly.

"Well, find a quiet place and talk about the problem in detail. Gu Lu closed the book.

Zhao Yi took Gu Lu to a certain window position in the library.

Zhao Yi opened his backpack, took out the office version of his laptop from it, operated it, opened a document, and turned the screen to Gu Lu.

Gu Lu looked at the screen, "The suitability of the second-order finite delay degeneration differential equation in Triebel-Lizorkin space?"

Zhao Yi nodded, "Well, that's it, my master's thesis." Differential direction, big guy, is that okay?"

"I'll see. Gu Lu spoke, touching his chin and sweeping the theories described in Zhao Yi's paper.

The so-called degenerate time-delay differential equation is just a variant of the ordinary differential equation.

Although Gu Lu mainly focuses on geometry and number theory, it is only a master's thesis, and Gu Lu seems to be quite relaxed.

Even so, differential equations are not an area that Gu Lu is very good at.

Half an hour later, Zhao Yi's paper Gu Lu had finished reading.

In terms of completion, his paper seems to be less than half complete.

But the graduation defense will be held in June.

No wonder Zhao Yi was so sick and rushed to the doctor.

Gu Lu thought for a few seconds and said, "The trouble you encountered, don't you know how to calculate the suitability conditions of the second-order time-delay degenerative differential equation next?"

"Yes, yes, that's it. Zhao Yi nodded like a chicken, "For this, I'm about to pull all my hair off, but I still don't have any ideas." So I want you to point me through the maze. ”

Then, Zhao Yi looked at Gu Lu expectantly, "Gu Shen, is it difficult?"

Gu Lu shrugged, "It's very simple. ”

Very simple?

Zhao Yi was stunned.

Gu Lu's tone was light, "With the introduction of the Fourier multiplier, all the problems will be solved." ”

"Fourier multiplier, Fourier multiplier......" Zhao Yinan muttered a few words, and then his face suddenly realized and patted his thigh, "The Fourier multiplier theorem of Triebel-Lizorkin space!"

Zhao Yi's level of mathematics is not bad, otherwise he would not have entered the Department of Mathematics of Peking University, and was reminded by Gu Lu that he instantly found the key.

Gu Lu snapped his fingers and said with a smile, "This is it." ”

"Thank you, big guy!" Zhao Yi really threw himself into Gu Lu's admiration, and he pondered the problem of not thinking for more than a week, and when he came to Gu Lu, he did it directly in half an hour.

He directly pulled Gu Lu to the outside of the library, "Come, big guy, I invited you to dinner today, what to eat, whatever you want, I promise to be satisfied." ”

"For no other reason, buddy is just happy today!"

…………

PS: Ask for wave recommendation! There are still 40 people left in the top 300!