"Professor, there is Tong Yang's defense this morning, which will be held in Room A2 of the Mathematics Building."

In the office, assistant Tang Ran knocked on the door and quickly reported.

At the desk, Xu Chuan put down the signature pen in his hand, nodded and said: "Yes, I understand."

He agreed to Tong Yang's graduation defense, or in other words, he would usually appear for every accepted student's graduation defense unless there were special circumstances.

In fact, according to general regulations, students' graduation defense generally has a system for avoiding instructors, but the implementation methods of each school are also different.

In some schools, the tutor may not be present throughout the entire process, in some schools, the tutor may be present but silent, and in other schools, the tutor may help students supplement knowledge points or experimental data.

This varies in different schools and different majors.

As for his side, the situation is rather special.

For the three students who have already graduated, the defense process is different from that of ordinary graduates.

Whether it is Amelia, Gu Bing, or even Cai Peng, strictly speaking, the first three did not follow the formal defense process.

After all, these three people all gave one-hour and forty-five-minute reports at the International Congress of Mathematicians.

And in the entire Nanjing University, those with this qualification can count on one hand even if it is a forty-five-minute report.

In this case, rather than reviewing their defense, it is better to ask questions at the defense site.

So strictly speaking, Tong Yang's graduation defense was the first formal defense.

As a mentor, he should stand up for his students.

...

Along the tree-lined path of the campus, Xu Chuan came to the downstairs of the Mathematics Teaching Building.

Before he could enter, a cheerful voice came from the side, with some teasing and laughter.

"Hey~, isn't this Academician Xu a very busy man? Why are you free today?"

Following the sound, two middle-aged and elderly men came over from the other side. Seeing the people coming, Xu Chuan smiled and said hello.

"Academician Zhang, Director Zhou."

The visitors were all acquaintances. The former was Academician Zhang Weiping from Fudan University. It was he who had just spoken out. He had known Xu Chuan for a long time and had known each other since they worked in information security in high school.

The latter is Professor Zhou Hai, formerly a professor in the Department of Mathematics at NTU and now the director of the School of Mathematics.

"I thought you wouldn't come today, but I didn't expect you to be a primary school student." Zhang Weiping walked over with a smile and said with a smile.

Xu Chuan suddenly reacted, looked at Academician Zhang, and asked: "Could you be..."

Zhang Weiping smiled and said: "Why, can't you?"

Xu Chuan smiled and shook his head, saying: "I didn't expect Tong Yang to be so honored to have an academician as the defense judge."

He really didn't expect that Zhang Weiping, Academician of Fudan University, would come over specifically to attend Tong Yang's graduation defense.

After all, people at the level of academicians each have their own research or projects, and there are really not many who can run around.

Hearing this, Zhang Weiping smiled and said: "Let's go up first. I think the others should have arrived early."

"Others?" Xu Chuan's eyebrows skipped a beat. He looked over and felt something was wrong.

Zhang Weiping smiled mysteriously and said: "Of course they are the other defense judges. You have to know that I managed to get this spot."

"Rob?"

Xu Chuan was stunned for a moment, looked at Professor Zhou Hai and asked, "Director Zhou, who are the judges for today's defense?"

Although he agreed that Tong Yang would participate in his doctoral defense, he didn't really ask who would be on the defense committee. He thought it would just be a few professors from the mathematics department, so he didn't pay much attention to it.

Looking at it now, the situation seems a little wrong?

Zhou Hai coughed slightly and said with a smile: "We are all acquaintances, don't worry."

Seeing the two people acting mysteriously, Xu Chuan felt a little curious, but he didn't pay much attention.

It's just a doctoral defense. He has read the thesis and there are no problems. The defense process is almost complete.

It wasn't until he entered the defense classroom that Xu Chuan realized what Professor Zhou Hai meant when he said they were acquaintances.

Good guys, we are all acquaintances.

Academician Zhang Weiping from Fudan University, Academician Qiu Chengtong from Shuimu University, Academician Zhang Gongqing from Peking University, Academician Chen Zhiming from the Academy of Sciences, Academician Li Jun from the Shanghai Institute of Mathematics and Interdisciplinary Studies, plus Rong Zhizhuan, dean of the School of Mathematics at NTU.

Indeed, they are all acquaintances, and have interacted with each other before, and have communicated with each other through letters and phone calls.

But Xu Chuan really didn't expect that these people would come together.

When he graduated, he didn't have such a big fight.

There were six defense judges, five academicians, and one dean of the Digital Academy. If he, the mentor, had not come, Tong Yang would probably have cried on the spot.

"haven't seen you for a long time."

Seeing Xu Chuan, Academician Zhang Gongqing from Peking University walked up to him with a smile, stretched out his hand to shake it, and said with a smile: "The last time we met was at Princeton. We haven't seen each other for many years."

"Academician Zhang, long time no see. I didn't expect you to come here too."

Xu Chuan smiled and stretched out his hand to shake the old man in front of him, who had a somewhat thin figure and face.

Although the other party is from Peking University, it can only be regarded as a temporary position. Strictly speaking, he is from the Chinese Academy of Sciences, and his relationship with him is not shallow.

When he first entered NTU and solved the problem of weak Weyl-Berry conjecture, Academician Zhang had been to NTU.

Later, when he proved the Hodge conjecture at Princeton, Zhang Weiping gave him a gift, which included a large part of the questions for proving the Hodge conjecture. It was Academician Zhang Gongqing who proposed it, which was a big favor.

Zhang Gongqing smiled and said: "It just so happens that there is something going on in the Magic City during this period. I heard from Qiu Chengtong that one of your students has graduated, so we came over to have a look."

Opposite him, Qiu Chengtong smiled in this direction, with a very unsatisfied expression on his face.

The corners of Xu Chuan's mouth twitched and he said, "This is really Tong Yang's honor."

This chapter is not over yet, please click on the next page to continue reading! Zhang Gongqing laughed and said: "His paper was published in "New Advances in Mathematics". It is very good. I really envy you. The students you brought out won the Lianfei Award."

All."

Xu Chuan: "I hope Mr. Zhang will show mercy."

Zhang Gongqing said with a smile: "Show mercy? Why? When he can't beat him later, you go up and kill him randomly?"

"Ahem~" Xu Chuan coughed lightly and said with a smile: "Mr. Zhang really follows the trend."

Zhang Gongqing shook his head and said with a smile: "The world belongs to young people."

...

The graduation defense began quickly with a few people chatting.

Tong Yang, dressed in a very formal suit and leather shoes, walked up to the podium with a nervous expression on his face.

Although his mentor is Xu Chuan, the caliber of the defense judges is probably unprecedented in the country. He is definitely nervous. No one knows what kind of questions these big guys will ask.

The only thing that made him feel slightly reassured was that his mentor was sitting below.

I hope I can 'catch' him at the critical moment.

With an uneasy mood, Tong Yang began to formally defend.

PPT starts showing.

After following the self-introduction process, he began to describe his paper and briefly reported the main points and conclusions of the paper.

This process is very short, only taking five or six minutes.

The next question-and-answer session is the focus of the defense.

Looking at the big guys sitting under the stage, Tong Yang's heart was beating with anxiety.

In the classroom, the first person to raise his hand to ask a question was Qiu Chengtong. He asked straight to the point:

"In the ninth line of page seven of the paper, when you define the mapping process of the natural frame in the Euclidean space R3, you use extreme hypersurfaces and minimal surfaces to connect. Can you explain this in detail?

"

"Page seven, line nine?"

Taking a deep breath, Tong Yang quickly turned the paper to the place pointed by Academician Qiu Chengtong, and his brows immediately furrowed.

Without him, this position was exactly where Xu Chuan put forward his optimization suggestions when he first showed his graduation thesis to his tutor.

Pursing his lips, Tong Yang raised his head and said, "Can I use the blackboard?"

"Of course." Qiu Chengtong nodded.

“Suppose x:M→R^n 1 is a locally strictly convex hypersurface, given by a strictly convex function xn 1=f(x1,x2,…,xn) defined on a convex domain Ω R^n,

Suppose Y=(0,0,…,0,1) is the classical relative method of hypersurface, then the corresponding co-method field...."

Looking at Tong Yang writing on the blackboard, Qiu Chengtong narrowed his eyes, nodded approvingly, and said: "Very good."

Not to mention that it is required for the graduation defense of a doctoral student. This kind of exquisite simplified idea is very outstanding even if it is applied to a full professor.

Not to mention the entire paper, at least this section can be said to be very excellent.

After briefly explaining what Qiu Chengtong asked, Tong Yang stood on the podium and hesitated before speaking:
To be continued...