Chapter 117: The whole Qinghua is unmatched [ more subscriptions required]

"It seems that cramming is useful. This time, we achieved a record of no failed subjects in the final exam. As the dormitory head, I didn't bring shame to everyone."

Friday, February 2005, 2, Bauhinia Apartment, Qinghua University.

Inside the boys' dormitory, Li Zhenya pointed to the grades on the computer and said to several of his roommates who looked refreshed. Judging from the confident smiles on their faces, they must be in a very good mood.

Wang Haitao, who was standing next to him, also said, "It's great that we don't have to take a make-up exam."

"The final exam questions this time are not difficult." Liu Yang said casually while squatting on the bed and adjusting the quilt.

We all agreed to go back to school together today. While they were tidying up the bedding and cleaning the dormitory, their mouths were busy. Even the voices from the neighbors could be heard.

Li Zhenya and Wang Haitao didn't care about what Liu Yang said. As long as they didn't fail the exam, it was fine.

It has no impact on whether the exam questions are difficult or not.

Having said this, Li Zhenya suddenly turned his gaze to Xu Yuan.

Looking at Xu Yuan who was wiping the table with a rag, he walked over, patted his shoulder and asked, "Xu Yuan, is there any news about your graduation defense? When will it start so that we can support you?" It can be seen that he is indeed concerned and curious about this matter.

Through Xu Yuan, they can get familiar with the graduation defense process in advance, which will make it much easier when they are in their senior year.

However, before Xu Yuan could answer, he suddenly heard Wang Haitao's voice.

"Brother Yuan's paper was submitted to the Annals of Mathematics. It's not a big deal for him to handle a graduation defense. There's definitely no need for us to cheer him on."

"That's true." Li Zhenya thought about it and nodded in agreement.

As long as it is related to Xu Yuan, Liu Yang will definitely not let his words fall on the ground.

The next second he added: "At this time, the graduation defense should be held by Brother Yuan only, and he won't allow outsiders to attend."

"During the holiday, Professor Tang said that the department has arranged it for next month." Xu Yuan did not keep the secret and answered truthfully: "I just don't know what the defense format will be."

Regarding his undergraduate thesis defense, Tang Shihong seemed mysterious over the phone.

Only an approximate time is revealed.

Things like the format of the defense and who would be attending were not mentioned.

It made him look forward to it.

But despite his anticipation, he didn't feel nervous at all.

Anyway, no matter what the defense lineup is, he has the problem of the overall smoothness of the solution to the Monge-Ampere equation to prove his thesis, and he believes that no matter how high the standard is, he can give the participating professors a big surprise.

"To be honest, I envy Xu Yuan more and more. Being able to study for a doctorate is completely different from being an undergraduate like us."

Li Zhenya didn't know what he was thinking about, and suddenly he blurted out these words.

And it also got the recognition of Liu Yang.

"You think the intellectuals are talking about us undergraduates? Now I also feel that I still need to study for a master's degree and get a doctorate."

The so-called intellectuals do not refer to the increasing number of undergraduates every year.

At least a PhD is required.

Xu Yuan was naturally aware of this. After all, the starting point for intellectuals in China is a doctorate.

It is also the starting point of academic and scientific research level.

Academicians are at the top of the academic and scientific research ladder and are no longer simple intellectuals.

Just when he was about to speak, he was suddenly interrupted by Wang Haitao's question.

"Brother Yuan."

"Are you really still living in our dormitory while you're doing your postdoctoral studies?"

"I heard that the newly built Zijin Apartment has a doctoral dormitory, and it's a single room. Why don't you live there, Xu Yuan?" Li Zhenya thought for a moment and gave Xu Yuan a suggestion from the bottom of his heart: "Come over often when you have time in the future."

The voice just fell.

He was immediately recognized by Wang Haitao and Liu Yang.

"Yes, Brother Yuan."

"There's no need to put yourself in a difficult position for us."

In their opinion, in terms of accommodation conditions alone, the single room dormitory for doctoral students is definitely better.

If Xu Yuan continued to live with them, he would feel somewhat guilty.

After listening to everything they said, Xu Yuan naturally understood that everyone was considering him.

However, he did not have high requirements for where to sleep. After all, he usually spent most of his time in the library and discussion room, so he did not have to worry about being disturbed by other people in the dormitory.

Just to clear everyone's grudges, he organized his words a little and explained the matter in detail.

"Don't worry."

"The department will also allocate doctoral dormitories by then, and I can live between the two places."

When Li Zhenya and the others heard what Xu Yuan said, they immediately felt relieved and no longer worried.

Since we have just returned to school and tomorrow and the day after tomorrow are weekends, there is no need to attend roll calls for the time being.

After dinner, Li Zhenya and Wang Haitao suggested taking a walk, hoping they could meet junior or senior students and ask for their contact information, which was a weekly routine for the two of them.

Although it has been such a long time, they have not yet encountered any girl who actively asked for their contact information.

But the main point is persistence.

Unfortunately, both Xu Yuan and Liu Yang decisively chose to refuse.

"I want to go to the library and return the books I borrowed before." Liu Yang was the first to speak and find a reason to refuse.

After saying that, he did not forget to ask Xu Yuan: "Brother Yuan, are you going to the library?"

"I'm going to the discussion room later." Xu Yuan shook his head.

Then they separated, and Li Zhenya and Wang Haitao took the lead and headed for the playground with great interest.

Xu Yuan walked alone on the campus road, and soon arrived at the door of the discussion room assigned to him by the department.

He took out a mask from his pocket, opened the door and went in. He simply wiped the dust off the table and chairs, then walked straight to the computer, sat down and turned it on skillfully.

"Let's see if there's any news from the Mathematical Yearbook first..."

While I was thinking about these things, the computer was successfully turned on and the familiar desktop background appeared.

He did not pay attention to this matter during the holiday, thinking that the review process of the Mathematical Yearbook would not produce results so quickly, so he did not think of checking his email until he returned to school.

The main thing is that he submitted the article himself this time, and he also has to keep an eye on the response from the editorial board.

Although it is normal for his paper to be accepted given its quality, the timing of the reply is related to when it will be officially published in the journal.

After quickly logging into his mailbox, Xu Yuan immediately saw a notification that there were two new emails.

I moved the mouse and clicked on it, and I was surprised to find that the email was from Princeton.

“Is there any news about the paper?”

Perhaps he did not expect the review process of the Annals of Mathematics to be so fast, so he was a little surprised.

The thought stayed here, and he subconsciously leaned forward and began to read carefully.

Not long after, Xu Yuan read both emails and found that the content was exactly what he thought. His paper was officially accepted by the Annals of Mathematics.

One of the emails came from the editorial board of the Annals of Mathematics, in which the editor-in-chief Holt gave a high evaluation of his paper, saying that the overall smoothness of the solution of the Monge-Ampere equation had been thoroughly proved, breaking the existing understanding of partial differential equations by mathematicians for many years.

There have been new advances in the study of optimal transmission theory, expanding the scope of this theorem to a wider range of fields.

As for the last part, he was thanked for choosing the Annals of Mathematics and was informed that the paper would be published in the latest issue of the journal.

The other email came from Professor Deligne of the Institute for Advanced Study at Princeton University.

In the email, the other party not only praised him highly, but also described him as the Prince of Mathematics and even invited him to study for a doctorate at Princeton University.

To be honest, Xu Yuan was surprised after reading the content of the email. He did not expect that Professor Deligne would write to him personally.

After all, the other party has a very high status and authority in the mathematics community, and many people know him even in China.

Now, I am writing a letter personally for him, an undergraduate student. It does feel unexpected.

Unfortunately, he was not very interested in going to Princeton, so he could only say sorry to the other party. Faced with this situation, he wrote an email to Deligne on the spot.

Although he politely declined the invitation in the email, he still expressed that he would definitely go to Princeton University for exchange and study if he had the chance.

Soon Xu Yuan looked at the status of the successfully sent email and wondered whether he should use the remaining time to study differential geometry or tell Tang Shihong the news first.

"never mind."

"Let's tell Professor Tang the news first."

After thinking for a while and making up his mind, he immediately took out his cell phone and called Tang Shihong.

It turned out that Tang Shihong was in the office at the moment, and he asked him to go over to discuss the matter while he had time.

Faced with this situation, Xu Yuan naturally would not refuse, so he had to quickly turn off the computer and go to Tang Shihong's office.

……

"Your paper has been accepted by the Annals of Mathematics, and Professor Deligne has personally written to invite you to Princeton?"

After Xu Yuan told Tang Shihong the situation in the office, he immediately nodded to confirm again when asked.

“I just saw the email.”

"The fact that Professor Deligne wrote to you personally shows that your talent in mathematics has been recognized by the mathematical community. Prince of Mathematics is a very valuable title." Tang Shihong said excitedly at this time. He never expected that Xu Yuan would give him such a big surprise right after the school started.

Especially when he learned that even Deligne valued Xu Yuan so much, he was filled with pride.

Who made such an excellent mathematical genius his student?

Then he calmed down temporarily, put on a smile and continued talking to Xu Yuan.

"He has completed his undergraduate courses in such a short time and has published two papers in the Annals of Mathematics. This achievement is unmatched even in the entire Qinghua University."

"Fortunately, I have specially prepared for your graduation defense. I hope I can leave a deep impression on you."

When it comes to graduation defense, Tang Shihong suddenly becomes mysterious again and chooses to keep it a secret for the time being.

Xu Yuan had no reaction when he heard this, and did not ask in detail about the specific arrangements for the graduation defense.

He was so confident that he didn't need to worry at all.

Since Tang Shihong had to go home, Xu Yuan did not stay in the office for too long. After coming out of the building, he was too lazy to go back to the discussion room and simply went straight to the dormitory.

Xu Yuan was not idle during the weekend, and continued to study the relevant content and data of differential geometry.

In the blink of an eye, it is March.

While other students successfully emerged from their holiday state and gradually got back on track to attend classes and study every day, there were only a few days left before Xu Yuan's graduation defense.

-

"Old Tang, tell me the truth. Can Xu Yuan's graduation thesis hold its own?"

Beside a driveway on the campus of Qinghua University, Liao Fangyi, the director of the School of Mathematics, had a worried look on his face. His eyes were always fixed on Tang Shihong beside him, asking him questions repeatedly.

Tang Shihong was obviously keeping the director in suspense, and he gave a resounding answer to the director's question.

"Don't worry, Director."

"Xu Yuan's graduation defense this time will not disappoint you. I promise you this."

Although Liao Fangyi really believed in Tang Shihong, he had never seen Xu Yuan's graduation thesis after all, so he couldn't help but still feel a little worried.

"I followed your advice and invited Academician Ma and many other academic leaders in the field of mathematics from various universities, just to attend Xu Yuan's undergraduate thesis defense."

"If we can't produce a good graduation thesis, it will be a disgrace to our Qinghua Mathematics Department."

After Xu Yuan successfully proved the global smoothness of the solution to the Monge-Ampere equation, Tang Shihong specially found Liao Fangyi and invited mathematical academic leaders from major universities to come and participate in Xu Yuan's undergraduate thesis defense on behalf of the department.

Such a large lineup is unparalleled in the entire country.

In fact, rather than participating in a graduation thesis defense, in a sense it is no different from an academic conference.

But this time the scope is smaller.

Even at Qinghua, the most famous institution of higher learning in the country, undergraduate graduation defenses are attended by professors and lecturers from the department, and sometimes it is just a formality.

It is rare that a defense fails.

A defense like Xu Yuan's directly brought together nationally renowned mathematics professors.

It's completely an isolated case.

That is, Xu Yuan proved the Carmichael number spacing problem and gave a wonderful report at the number theory academic conference held by Qinghua University, Yenching University and the Mathematical Council. Otherwise, he would not have come even if the director of the Qinghua Mathematics Department personally invited him.

But this is precisely why Liao Fangyi is worried.

With so many leaders in the field of mathematics from key domestic universities, the content of Xu Yuan’s defense represents the reputation of Qinghua.

If mistakes were made during the defense, the quality of the paper might not be up to par, which would be very embarrassing.

After all, it was they who took the initiative to invite us.

Tang Shihong was full of confidence. In his opinion, it would be a shame if only a few people from his department were present to defend a paper accepted by the Annals of Mathematics.

I even feel that this lineup is not worthy of this paper.

That's why he found Liao Fangyi and tried his best to persuade him, and finally made this special and unique defense scene happen.

Just as the two were talking about this matter, a school shuttle bus suddenly drove over.

After the vehicle stopped and the door opened, more than a dozen middle-aged men with different amounts of hair walked out.

Liao Fangyi and Tang Shihong hurried forward to greet them.

"Academician Ma."

"Old Hu."

……

No matter which university everyone works for, they are all members or directors of the Mathematics Council, so there is no unfamiliarity between them, especially since most of them have participated in number theory academic conferences before.

After a few pleasantries to liven up the atmosphere, everyone's topic shifted to business.

"This time, your Qinghua Mathematics Department has made such a big fuss. I guess the content of the thesis defense is not simple, right?"

Ma Zhiming, chairman of the Mathematical Council of the Huazhong University of Science and Technology, was the first to ask Liao Fangyi about the situation.

His words were full of anticipation for the content of this defense.

He was quite familiar with Xu Yuan, from awarding him the national gold medal at the mathematics winter camp to attending his academic lectures later.

I am glad that there is such a mathematical genius among the new blood in the country.

Therefore, when he received the invitation from Qinghua Mathematics Department and learned that Xu Yuan was going to defend his graduation thesis, he agreed without hesitation.

As Ma Zhiming was the first to raise the question, everyone soon started talking.

"He completed all the undergraduate course credits and even completed his graduation thesis in such a short time. This speed is enviable even now."

"How can you be called a genius if you don't do this?"

"I studied for four years as an undergraduate, so I feel a little embarrassed when I compare myself to others."

"When Xu Yuan participated in the International Mathematical Olympiad, I saw that he was incredibly talented."

"Qinghua takes the ordinary undergraduate defense so seriously. I'm suddenly looking forward to tomorrow's defense."

……

If Xu Yuan was here at this time, he would definitely be able to find several familiar people at the scene.

In addition to Academician Ma Zhiming, President of the Mathematical Society, there were also Professor Hu Zhiwei of Jinling University, who previously served as the leader of the Olympiad team, and Professor Qi Tongxiang of the University of Science and Technology of China, who he had just met not long ago.

The others were all mathematics professors from key universities and had previously attended academic conferences on number theory.

Compared with others, Qi Tongxiang undoubtedly knows more information.

When the Higher Education Press Cup held its regional defense, he invited Xu Yuan to come to USTC to serve as a judge and give a public lecture.

The Monge-Ampere equation he talked about in his open class was later confirmed to be Xu Yuan's graduation thesis.

However, although he knew Xu Yuan's talent, his own knowledge of mathematics told him that Xu Yuan would not be able to prove the overall smoothness of the solution to the Monge-Ampere equation in such a short time.

After all, there have been no new research advances in the field of partial differential equations for many years.

In addition, Xu Yuan has not contacted him during this period, and it is estimated that he finally chose to give up the Monge-Ampere equation.

The graduation defense to be held tomorrow should be the research results completed after changing the new topic.

His thoughts quickly ran to this point, and he did not take the initiative to mention the problem of Monge-Ampere equation. Anyway, he would know the specific content tomorrow.

While Qi Tongxiang was thinking about these things, Liao Fangyi, as the department head, was under tremendous pressure.

He had exactly the same information as everyone else and had not read Xu Yuan's graduation thesis. How could he answer everyone's questions?

Fortunately, Tang Shihong, who was standing next to him, spoke up in time to resolve the situation, and the topic was temporarily removed.

"You may wish to keep your expectations for now. You will naturally know the content of the thesis when the defense officially begins tomorrow. In short, I promise you here that I will never let you down."

After hearing this, everyone naturally stopped asking questions. After all, the quality of the paper had no impact on them. If it was not presentable, it would only bring shame to Qinghua.

But when I saw the undisguised pride and pride on Tang Shihong's face when he said this, I couldn't help but feel a little jealous. It would be a lie to say I wasn't envious.

As university professors, doctoral supervisors and academic leaders, they naturally have many students.

But when I went through all the names carefully in my mind, I couldn't find anyone who could compare to Xu Yuan.

You should know that in addition to proving the interval problem between infinite Carmichael numbers right after entering school, Xu Yuan also helped Wang Xiaoyun's team crack the MD5 cryptographic algorithm, and reported the research results at the International Cryptography Conference to verify the cracking of the MD5 cryptographic algorithm on site.

This kind of highlight moment in life is something that their students, let alone themselves, have rarely experienced.

Tang Shihong could naturally feel everyone's eyes on him, but he just enjoyed it silently without saying anything.

All he could say was that recruiting Xu Yuan into Qinghua's Department of Mathematics was the best thing he had ever done in his life.

Maybe in the future I will have the opportunity to become an academician and try to reach the ceiling of academic research.

It is worth mentioning that all the people who came this time have already checked into the hotel, and today’s event is considered a small exchange activity held by the department.

Only then did they send a special car to pick the person up.

After all, I was invited here with great difficulty, and it would be a waste of resources to just attend a defense.

-

Suddenly, a group of academicians and professors from other schools appeared in the Department of Mathematics, accompanied by the department head and professors of the department. Naturally, this attracted the attention of other students and they expressed curiosity.

If you want to know something in a short time at school, the best way is undoubtedly to go to the school forum.

And the actual situation was indeed so. By that evening, several inquiry posts had appeared in the Shuimu Qinghua Forum.

"Does anyone know why so many academicians and professors from other schools came to the Academy of Mathematical Sciences this morning?"

"Is there any exchange meeting in our mathematics department? Even the president of the mathematics council is here. Why can't I find any relevant notice from the department?"

There are also many replies under each post, especially from students of the Department of Mathematics.

“I haven’t heard of any exchange activities.”

“It seems that they are all academic leaders in the field of mathematics from other universities. I didn’t expect that they all came to us.”

"The last time I saw such a grand scene was when we jointly held a number theory academic conference."

"I passed by this morning and seemed to hear that he was attending a graduation defense."

"That's impossible. Which doctoral dissertation defense would have so many professors?"

"If this really is a graduation defense, just thinking about it makes me feel very stressed."

……

Zhang Jundong will officially enter his senior year in the second half of the year. Since he has decided to continue studying for a master's degree, he does not have to worry about work. However, his graduation thesis has become his most urgent issue.

The key point is that he has no idea at all, and he can't even decide which content is suitable as his topic.

After the Chinese New Year and the start of school, the closer I got to my senior year, the more anxious I became, and I desperately wanted to decide on a topic.

This way, once you have a goal, you can focus on filling it with content.

"Graduation thesis is really hard to write. No wonder even God Xu spent so much time thinking about it in the library."

At night, he sat at the computer in the dormitory and couldn't help sighing when he thought about his current situation, which was in stark contrast to his roommates who were playing games around him.

His roommate had a different mindset, thinking that graduation thesis was something that should be done in the senior year so he could deal with it later.

We can’t let this make our junior year unhappy.

However, due to Zhang Jundong's personality, it is impossible for him to relax without solving his inner problems.

"never mind."

"Let's go to the forum and look for some tips."

At this time, he thought of the fact that many seniors had posted their thesis experiences on the forum, so he muttered that learning from their experiences might help him determine the topic of his thesis as soon as possible.

After quickly logging into the forum with his hands on the keyboard, his attention was suddenly attracted by several hot posts.

He stopped and looked at the content above, a strange look appeared on his face.

"President of the Mathematics Council..."

“Academic leader in the field of mathematics at a key university…”

"Come to attend the graduation defense?"

As far as he knew, he had never heard of anyone's graduation defense having such a stressful lineup.

But just as he was murmured, a name suddenly emerged in his mind.

"Could it be God Xu?"

When he met Xu Yuan in the library last year, he knew that the other party was writing his graduation thesis, which was indeed consistent with the time span.

Moreover, when Xu Yuan reported on his proof of the infinite number of Carmichael numbers at a number theory academic conference, there were many more mathematics professors attending than there are now, and even many mathematics scholars from famous overseas universities came from far away.

Especially when he thought of the scene when Xu Yuan was explaining the questions to him, he became more convinced that only Xu Yuan had the ability to face so many professors.

Although many people speculated that it was a doctoral dissertation defense, he always felt that it was related to Xu Yuan.

The thought stayed here, and after a slight hesitation, he tapped the keyboard to reply with his guess.

"Xu Yuan was writing his graduation thesis last semester. Maybe these professors came to attend Xu Yuan's graduation defense."

At Qinghua University, especially in the Department of Mathematics, most students may not know a certain professor, but Xu Yuan's name is very familiar to them.

Suddenly I saw someone mention Xu Yuan, and the speed of replying to the post suddenly became much faster.

People from other departments had just expressed their doubts, thinking that Xu Yuan, who was only a sophomore, could not possibly defend his graduation thesis so soon, but the students with the note of "Department of Mathematics" verified it.

"Xu Yuan is still a sophomore, how could he possibly be defending his graduation thesis at this time?"

"There are so many academic leaders in the field of mathematics. This must be a doctoral thesis defense. It is probably an activity carried out by many doctoral students together."

"It seems that many people still don't know that Xu Shen has already completed his undergraduate credits and graduated early. He will directly study for a doctorate in the new semester this year, and he will indeed have to defend his graduation thesis soon."

"I actually got a Ph.D. directly. I'm so envious."

"This is fast, right? I will graduate with a PhD in just two years."

“I want to know what level of graduation thesis can attract so many academic leaders to participate?”

……

Xu Yuan did not hear about the discussion on the school forum until he was about to go to the lecture hall for his graduation thesis defense the next morning, when he heard Li Zhenya, Wang Haitao and others discussing it in the dormitory.

"There are so many professors and academicians here. If everyone asks a question, I'm afraid we won't be able to handle it."

"If it were me, I wouldn't expect to pass the defense."

"Only Brother Yuan's thesis can hold up. Even if a PhD were to replace him with this kind of lineup, it wouldn't work." In the dormitory, Wang Haitao took over Li Zhenya's words and expressed his feelings.

At this time, Xu Yuan was standing in front of the mirror in the dormitory, tidying up his clothes and hair.

After all, for every graduate, conducting a graduation defense is a rather special experience, so of course he has to attend it in the best possible manner.

Tang Shihong actually invited so many professors and academicians from outside to serve as judges for his graduation thesis defense, which really surprised him. No wonder Tang Shihong was so mysterious when this matter was mentioned.

However, he was not nervous at all. On the contrary, he was not afraid of the judges asking questions related to the paper, but he was afraid of not asking questions.

"Brothers, I'll go over first. Wait for me to return triumphantly."

At this time, Xu Yuan tidied his hair, turned around and shouted this to several people in the dormitory with a smile, then he made a gesture to push the door and leave.

Upon hearing this, Li Zhenya, Wang Haitao, Liu Yang and others expressed encouragement and support.

"Come on, Brother Yuan."

"Give those professors from other schools a little Qinghua shock."

"Finish early and wait for you to eat at noon."

Xu Yuan nodded upon hearing this, then left the dormitory and went to the place where he would hold his graduation defense.

Because this time, including the professors in the school, the number of judges serving as judges for the graduation defense has reached an astonishing twenty or so, and it would definitely not be appropriate to use an ordinary discussion room or classroom.

So the hospital specially arranged a small lecture hall.

nine in the morning.

Xu Yuan arrived at the lecture hall on time, and he finally saw the judges of the defense.

Among the more than twenty judges, several are familiar faces.

It was not surprising that Qi Tongxiang and Hu Zhiwei were invited to attend, but he also saw Professor Wang Xiaoyun, which was something he really did not expect.

But soon I thought that Wang Xiaoyun originally switched to cryptography from mathematics and I no longer had any doubts.

"Although this graduation defense is quite special, there is no need to be nervous. Just treat it as a presentation at a number theory conference."

Liao Fangyi still couldn't be completely relieved at this moment, and he did not forget to remind Xu Yuan before the defense officially began.

"Okay, Director." Xu Yuan nodded in response.

At this time, everyone was impatient. Among them, Ma Zhiming, an academician of the Huazhong University of Science and Technology, took the initiative to say to Xu Yuan: "If you are ready, then let's start. We all want to know what the content of the graduation thesis is that Qinghua has held with such a grand ceremony." It can be seen that he is indeed looking forward to it.

What Xu Yuan talked about today was his proof of the overall smoothness of the solution to the Monge-Ampere equation. All the process formulas were in his mind and he didn't need to prepare anything in advance.

In this situation, he naturally would not waste time and immediately turned around and wrote the title on the blackboard.

at the same time.

The expressions of the many professors in the audience were also different.

The most confident and happy person was none other than Tang Shihong. Qi Tongxiang was hopeful but did not quite believe in his own thoughts, so he just stared at Xu Yuan.

The expressions of the others began to become serious, and there was no contempt in their eyes.

The main reason was that Xu Yuan had already proven his talent in mathematics, and the fact that Qinghua took his undergraduate thesis defense so seriously showed that the quality of his thesis was at least guaranteed.

This alone is enough to make them serious and enrich themselves by adopting other people's ideas and methods.

Xu Yuan quickly wrote the title of the paper.

"Proof of global smoothness of Monge-Ampere equation under natural boundary conditions"

When everyone saw this title, they couldn't help but feel a little surprised and astonished.

I didn’t expect Xu Yuan would choose to study partial differential equations.

Only Qi Tongxiang's eyes suddenly widened, and an almost certain idea suddenly popped up in his mind.

"What!?"

"Did Xu Yuan really prove this problem?"

Previously, he thought Xu Yuan had given up on this issue long ago and was choosing a new topic for his graduation defense, but he actually found such a surprise.

Since the topic of Xu Yuan's graduation thesis has not changed, he still uses it for the graduation defense at this time.

That only illustrates one problem.

Xu Yuan successfully completed a thorough proof of this problem.

Qi Tongxiang thought the matter through and temporarily suppressed his excitement without disturbing Xu Yuan's rhythm.

But he couldn't help but laugh and curse inwardly: "This kid didn't even bother to tell me when he proved it."

Xu Yuan did not pay attention to what the professors in the audience were thinking. After the lecture officially began, he started speaking at his own pace.

From the initial selection of the topic to the intermediate proofs, especially the clever use of physical methods to prove mathematical problems, the professors in the audience couldn't wait to applaud every time there was a wonderful moment.

But because he was worried that it would affect Xu Yuan's train of thought, he had to suppress it.

If everyone was just listening carefully at the beginning, after seeing Xu Yuan list the proof process, they all picked up the draft paper and verified it in the audience.

His face was filled with surprise and excitement, and he made no attempt to conceal it.

At this point they finally understood why the Qinghua School of Mathematical Sciences was willing to make such a big fuss for an undergraduate student. After all, this paper broke the academic community's understanding of partial differential equations for many years and was definitely a paper that could be published in a top journal.

Using it as a graduation thesis is like using an anti-aircraft cannon to kill a mosquito, which is really a waste of talent.

If a student from their school wrote a paper of this level, I'm afraid the scene would be even bigger than that of Qinghua.

At least we should call in journalists to publicize it.

As for the department head Liao Fangyi, there was no trace of sadness on his face at this time. The joy he showed was completely different from before.

At the same time, I felt a little bit resentful towards Tang Shihong. He should have told him about such a good thing in advance.

It also saves you from worrying for a long time.

Soon more than two hours passed, and Xu Yuan finally completed the entire report content of the thesis. Because he was too focused and there was heating in the room, there were beads of sweat on his forehead.

"The lemma shows that the theory of Monge-Ampere equation is globally smooth under natural boundary conditions."

After writing the last symbol and facing the crowd again, he gave his conclusion and fell silent, waiting for the judges to ask questions about the content of the paper.

The professors in the audience had already been attracted by Xu Yuan's proof process, and at this time, how could they control their emotions?

The next second, they all stood up and applauded and cheered enthusiastically, not sparing their praise at all.

"so amazing."

“Using physics to prove mathematics is a really ingenious method.”

"This paper completely removes the two necessary conditions for the smoothness of the solution to the Monge-Ampere equation, opening up new research opportunities for optimal transport theory."

“What a wonderful report.”

……

But after a few minutes, when the lecture hall returned to silence, no one asked any questions.

Ma Zhiming and others were also a little embarrassed about this.

The main reason is that Xu Yuan’s proof method and process are so ingenious that there is nothing wrong with them.

It is no exaggeration to say that Xu Yuan's understanding of the Monge-Ampere equation is probably deeper than anyone else present. In this case, who would dare to ask questions?

Maybe if this problem is brought up, Xu Yuan will even give them a lesson.

Thinking of this, they couldn't help but complain about Qinghua's move, thinking that for a thesis of this level, there was still a need for a graduation defense, wouldn't it be better to just hold a formal academic conference?

It's obvious that he wanted to show off on purpose.

The key is that there is such a math genius in the school, and they can't help but envy him.

After about half a minute's pause, Ma Zhiming coughed twice and spoke to Xu Yuan in a tactful way.

"Your paper has reached the level of a top journal, so there is no need for a question-and-answer session."

As soon as he finished speaking, he turned his gaze to Liao Fangyi: "Director Liao, what do you think?"

"Academician Ma, what you said makes sense. Then I will declare that Xu Yuan has passed the graduation thesis defense."

Liao Fangyi did not hide the smile on his face at all and immediately announced the news in front of all the judges.

Xu Yuan was standing on the stage and was a little slow to react when he heard these words. He thought that he had passed his graduation defense.

Just as he was thinking about it, Ma Zhiming's voice suddenly came from the audience: "Your paper plays an important role in the study of partial differential equations. You can submit it to a top journal in the field of mathematics for publication." He made this suggestion to Xu Yuan sincerely.

Upon hearing this, Xu Yuan naturally did not hide anything and immediately told the other party that his paper had been accepted by the Annals of Mathematics.

"Thank you Academician Ma for the reminder."

"This paper has been submitted to the Annals of Mathematics and should be published in the latest issue."

"Okay."

When Ma Zhiming heard the answer, he was stunned at first, then his face was filled with joy and he was very excited.

"It is a blessing for the Chinese mathematics community to see that we still have such an outstanding mathematical genius."

Then other people started praising him, and the looks they gave Xu Yuan were as if they had discovered some rare treasure.

Qi Tongxiang, who was also smiling, walked directly to Xu Yuan and said in a complaining tone, "I didn't expect you to have solved this problem, but you didn't even bother to call me."

Xu Yuan listened to Qi Tongxiang's words and felt a little embarrassed.

After returning to school from HKUST, he was so absorbed in thinking of ways to remove the two necessary conditions that he forgot to tell Qi Tongxiang after completing the proof.

Later I remembered it and decided to wait until the paper was published before telling him about it, so that I could give the other party a surprise.

Thinking of this, he quickly explained: "Professor Qi, I want to tell you after the paper is published."

"okay."

"I won't be angry with you for such a small matter." Qi Tongxiang immediately raised his hand to interrupt, "I am so happy to see you stick to your goal and successfully complete it."

In the following time, everyone exchanged and discussed the proof methods of the paper.

During this period, Xu Yuan became a hot commodity. Everyone wanted to talk to him and even invited him to give lectures at universities.

On the day when the graduation defense ended, Qinghua Academy of Mathematical Sciences officially issued an announcement to announce the results of this special defense to everyone.

(End of this chapter)