Chapter 71 I can't believe it
"He is from the School of Mathematics of Qinghua University and participated in the last International Mathematical Olympiad?" Feng Zuming repeated the information given by Richter and felt a sense of familiarity: "Could it be Xu Yuan who won the gold medal for absolute winner with full marks?"

"It seems to be this name. Professor Feng, do you know him?" Richter stood up quickly with a look of surprise.

When Feng Zuming received this answer, he was completely stunned and could not believe it.

Although the Carmichael number problem has been solved long ago, all that remains is the associated interval proof.

It is not particularly important among the many conjectures and difficult problems in the mathematics world, but it should not have been solved by a college student.

The key person is Xu Yuan.

The one who had previously declined his invitation to the D'Orsay dinner.

With this thought in mind, he subconsciously blurted out the question without any hesitation.

"This Xu Yuan is just a freshman in college. How could he possibly prove the interval problem in Carmichael numbers?"

"Is it a mistake?"

But as soon as he finished speaking, he felt a little regretful and quickly realized that he had said the wrong thing.

really.

Richter, who was originally smiling, immediately frowned upon hearing this and expressed his dissatisfaction to Feng Zuming.

"Professor Feng."

“Are you questioning the Institute for Advanced Study editorial board?”

"This paper was reviewed by Mr. Holt, the editor-in-chief of the editorial board, Professor Deligne of the Institute for Advanced Study at Princeton, and Professor Pomerance of Dartmouth College."

"Professor Pomerance gave a very high evaluation of the proof method."

"I think no one would question Professor Pomerance's authority in the field of Carmichael numbers."

"I'm sorry Mr. Richter."

Feng Zuming quickly explained: "I was just quite surprised."

At this point, even though it was hard for him to believe, he had to admit that his previous judgment was wrong.

Even if he stayed at Qinghua University, he could still make academic achievements in the field of mathematics.

He was able to prove the interval problem in Carmichael numbers just after entering college. He is indeed quite talented!
No wonder he was so confident at the time and believed that he would definitely achieve academic success.

and many more.

Could it be that during the International Mathematical Olympiad, he had already...

Feng Zuming recalled what happened at the dinner that day, and suddenly thought of the other party's confidence at that time. He had not taken it seriously at first, but now combined with this paper, he was afraid that the other party would complete the proof process before the end of the Olympiad.

If this is the case, it would be even more shocking.

In the International Mathematical Olympiad, contestants are basically under pressure, and all they think about is the exam.

Just to win the gold medal and bring glory to the country.

It is incredible that Xu Yuan still has the energy to solve difficult mathematical problems under such circumstances.

Richter would not really fall out with Feng Zuming over this, mainly because the Institute for Advanced Study represents absolute authority, and the journals it publishes are definitely not allowed to be questioned by anyone, even if the other party is a professor in the Department of Mathematics at Princeton University.

But this little episode reminded him of something, and then his expression relaxed and he continued.

"Since you know this Xu Yuan, can you convince him to come to our Princeton University for further studies? Such an excellent talent should not be buried."

As the director of the Department of Mathematics, he always had the confidence that Princeton University was a paradise for mathematics.

When Feng Zuming heard this, he didn't know what to say, but he was sure that he would not invite Xu Yuan again.

If he was rejected twice, it would be too embarrassing for him, and he might not be able to continue in the mathematics field in the future.

Even now, he didn't want to meet Xu Yuan from the bottom of his heart, otherwise he could imagine the embarrassing scene.

His thoughts stopped here and he had to explain: "In fact, I had already extended an invitation on behalf of Princeton University at the Olympiad dinner, but the other party chose to enter Qinghua University." He did not hide the fact that he was rejected by a high school student at that time.

"This is really a regrettable thing." Richter finally said with regret and gave up the idea.

……

Although it takes some time for the latest issue of Annals of Mathematics to arrive in China, it is already available on the official website.

In addition, Qinghua University officially announced the good news on the campus network, and many students noticed this.

Shuimu Qinghua is the most lively forum in Qinghua University. No matter what happens on or off campus, everyone will communicate and discuss with each other on it.

Some users even overlap with Tianya Community and often switch pages back and forth.

After being stimulated that day, Zhang Jundong made up his mind and worked hard for a month.

It was not until this month after the National Day that I had time to go to the Internet cafe. I didn't have two classes in the afternoon, so I planned to play some games. As a result, as soon as I sat down, I heard several classmates next to me shouting excitedly.

"Look at the school forum, there's a talented person among the freshmen this year."

“It seems like everyone is discussing it.”

“How awesome is it?”

"I heard that he is from the School of Mathematical Sciences and published a paper in the Annals of Mathematics during his freshman year."

Zhang Jundong immediately became interested after hearing this, and after turning on his computer, he skillfully opened the Shuimu Qinghua Forum.

As the page content appeared, a new post with high popularity suddenly appeared in sight.

"This year's strongest freshman, Xu Yuan from the third-class class of Qinghua Mathematics Department, successfully published a paper in the Annals of Mathematics. Qinghua's strength has surpassed that of Yenching University!"

While the title directly hits the important information, it also does not forget to criticize Yenching University.

It can only be said that this is what Qinghua students like to do. However, this made him a little uneasy, after all, the name Xu Yuan was almost engraved in his mind.

Thinking of this, he immediately clicked on the post to check the content, and his mood instantly became complicated.

Zhang Jundong quickly browsed through the posts by sliding his mouse, and he didn’t know whether to call him junior or senior next time they meet.

Although he is a student in the second-class class, after seeing the results achieved by Xu Yuan, he still has the nerve to call him his junior.

"It turns out that he was writing this paper in the computer room that day..."

Thinking back to what happened last time in the school computer room, a hint of bitterness appeared on his face.

His understanding was still stuck at the time when Xu Yuan won the gold medal in the International Mathematical Olympiad and became the top scorer, with the notification letter personally sent to him by the principal. However, it turned out that he had already entered a new track and published a paper in the Annals of Mathematics.

You know, he doesn't even know how to write a paper now.

He also recalled that when he first met Xu Yuan in Professor Tang's open class in March, the other party had mentioned the Carmichael number problem, but the final proof had not been completed at that time.

I didn’t expect that the paper would be published just after the National Day.

If you continue to move your eyes down, you can see that there are many replies to the post, even including many accounts with graduate students in their names.

“As much as I hate to admit it, I, a PhD student, cannot write this paper.”

"It really makes our freshman class proud."

"I remember that the opponent seemed to be the freshman representative this year. It turns out that he is so strong."

"He was the one who personally delivered the admission letter to the principal, right? I thought it was a bit exaggerated before, but now it seems that he really has the ability and qualifications."

"I feel like my graduate studies have been a waste of time."

"There isn't such a brilliant freshman in Yenching University. This kind of math genius belongs to our Qinghua."

"Who has the contact information of this junior? I want to do an on-campus interview with him to complete my major course homework."

……

After reading only one page of replies, Zhang Jundong felt a little overwhelmed and even felt guilty for staying in the Internet cafe.

After a period of inner struggle, he stood up and shouted in the direction of the network administrator.

"network management."

"Can I get a refund now that I'm off the plane?"

The front desk network administrator stood up, stretched his neck to take a look, and uttered two words in a cold tone.

"No retreat."

Hearing this, Zhang Jundong had no choice but to sit down again.

I did not forget to comfort myself: "The machine has been turned on and it cannot be wasted. I should wait until tomorrow to start working hard."

-

Previously, Xu Yuan was very well-known among the freshmen in the three-character class, but now, because of his thesis, his name may be remembered by the whole school.

In addition, many people have forwarded the relevant news to Tianya Community, and I think the popularity will further expand.

As for Xu Yuan, the protagonist of the incident, he was sitting quietly in his dormitory, holding a book on statistical computing and software, reading and studying it carefully.

Since you will be taking exams at the end of the semester and will be taking exams in your sophomore year, you cannot just pass and get credits, so you must hurry up and review the relevant courses. After all, the math courses in your junior and senior years will be more difficult.

Although he has made certain achievements in the field of number theory, he still has a lot to learn.

For example, differential geometry, complex functions, ordinary differential equations, etc.

After all, the threshold for number theory is relatively low, and it has long been loved by amateur scientists.

Although the midterm exam for the Department of Engineering Mechanics was in the middle of the month, he heard that Professor Xu Chongxing was working overtime to prepare the test papers for him, but he still had no intention of reviewing the relevant professional courses.

The main focus is on confidence in mechanics.

Liu Yang, who was sitting opposite, was also sitting at the table, leaning over as if he was writing something mysterious.

Li Zhenya and Wang Haitao were not in the dormitory. They said they were going to the playground in the evening to meet their senior schoolmate, but they have not returned yet.

Just when the dormitory was quiet, the door was suddenly pushed open from the outside with great force.

Before anyone was seen, the voice had already entered the dormitory.

"Brother Yuan."

"Has your previous paper been published in the Annals of Mathematics?"

"We heard some seniors chatting in the playground."

Wang Haitao rushed to Xu Yuan's chair first, asking with great excitement on his face.

Li Zhenya was not to be outdone and also took over the conversation and asked: "Is this true or false?"

Everyone in the dormitory had known for a long time that Xu Yuan had written a paper, but in their opinion it was just for practice.

After becoming familiar with it, you can prepare for your graduation thesis.

But no one expected that Xu Yuan would submit his paper to the Annals of Mathematics, and most importantly, it was included.

As a mathematics major, even if I have never written a paper, I know the value of the Mathematical Annals, which are basically journals that mathematics professors submit their papers to. Therefore, after hearing this on the playground, the senior sister became a cloud on the spot.

The two rushed to the dormitory without saying a word, wanting to ask Xu Yuan about the situation in person.

(End of this chapter)