Tech Hammer

Lu Dongyi finally got to see how much his beloved junior brother could do.

Before Ning Wei came, he always wanted him to come; but after he came, he found that this guy was not like the little junior brother who always shrank in front of him. How can you be so tough in front of your instructor!

But from Ning Wei's perspective, he must stick to his own ideas. Any theoretical breakthrough can bring unexpected improvements to his capabilities in March. This is his most important task at the moment.

The awesomeness that he boasted in front of Yu Xingwei had to come true.

Not to mention that when he first became interested in artificial intelligence technology a year ago, the list of knowledge that instantly burst out of his brain had already become an obsession in his mind. If you have the opportunity to solve these problems, you must fight for them.

So what if I don’t win the Fields Medal in four years? Anyway, he is still young, far from forty years old, so there is no point in competing for the youngest one.

When Lu Dongyi saw these things, he could only sigh in his heart: Are all young people today so precocious?

No matter what, now that people are here, it is definitely impossible to drive them out. Of course, the main thing is reluctant to give up.

So he walked out of Tian Yanzhen's office and went downstairs. Lu Dongyi dutifully began to introduce Ning Wei to the people who were still busy in the research center.

…

The International Mathematics Research Center of Yanbei University sounds very modern, but it is actually a complex of seven antique courtyards. The ground part has only two floors, but it bears the functions of integrating teaching, learning, and research, and also integrates the functions of academic conferences and administrative offices.

As soon as Lu Dongyi took him out of Director Tian, ​​the first person he met made Ning Wei feel the low-key and luxury inside this simple building.

"Professor Xu, let me introduce to you, this is Ning Wei. Ning Wei, this is Professor Xu Changjie."

"Hello, Professor Xu!"

"Ning Wei, hello, hello, we have been friends for a long time. Director Tian has been waiting for you, a direct PhD student, for a long time."

"That's why I'm here." Ning Wei responded with a smile.

After a few words of greeting, Lu Dongyi began to introduce Professor Xu Changjie to Ningwei for his honor: "Junior brother, Professor Xu has a PhD in mathematics from Princeton, and his main research direction is algebraic geometry. He is also the Qiushi Foundation's Outstanding Young Scientist in 2013 Award and the winner of the 13th China Youth Science and Technology Award; in 2017, he received a US$1 million bonus from the Future Science Award-Mathematics and Computer Science Award."

"Professor Xu won the Cole Algebra Prize last year. He was once the Yangtze River Distinguished Professor of our school and is currently the Poincaré Chair Professor. Professor Xu's main achievements include the development of the boundedness theory of log canonical pairs of log general type. It proves Shokurov’s ACC conjecture about log canonical thresholds.”

"Professor Xu also cooperated with Professor Heiken to develop the program of three-dimensional minimal models with positive characteristics, and made a world-wide breakthrough in the program of minimal models of logarithmic canonical singularities; and cooperated with Professor Li Chi to prove that our director Tian Co-proposed with Professor Donaldson on the equivalence of K-stability definition; worked with Professor Wang Xiaowei to solve the problem in the preface of "The Theory of Geometric Invariants" about the non-existence of asymptotically stable compactification of canonical polarization varieties. Currently researching is the dual complex theory."

Ning Wei felt a little dizzy.

Senior Brother Lu spent more than two minutes just introducing the professor's achievements.

This is the first man who looks ordinary and is probably in his thirties that I meet casually in the yard...

"Haha, Xiao Lu, don't praise me so highly. When Ning Wei and I were this old, we didn't dare to compare our achievements with him. You first get him familiar with the environment, and I'll go find Director Tian to discuss something."

"Okay, Professor Xu, go and do your work."

…

"Let me go, any professor here is so powerful?" Ning Wei couldn't help but ask as he watched Professor Xu walk into Director Tian's office.

"Although Professor Xu did work here before, strictly speaking, Professor Xu is no longer a professor here. He first went to work at MIT and now works as a teaching professor at Princeton. This time he came back to attend a conference. Let me discuss some issues with Director Tian by the way." Lu Dongyi explained.

"Oh! It turns out he's a professor from Princeton, so he must know Lucason Friend, right?"

Lu Dongyi: "...let's go."

"Ning Wei, this is Professor Liu Changming, who is also my former mathematics teacher. He is one of the best world-class experts in the field of p-ary Hodge theory research."

"Hello, Professor Liu."

"Ning Wei, welcome, welcome. I heard you came here once before, but unfortunately I went out for a meeting and didn't meet you. I want to stay in the courtyard for a longer time this time. We can discuss more if we have the opportunity."

"Okay, Professor Liu."

…

"Ning Wei, this is Professor Xiao Liang. He is currently the strongest professor in number theory and arithmetic geometry in Huaxia, and the organizer of the Emerton-Gee stack seminar. I have often attended Professor Xiao's classes before."

"Ning Wei is really here? I thought you would choose Princeton or MIT before. In fact, our place is also good. As you can see, the environment is very good, warm in winter and cool in summer. There are opportunities for more exchanges. ah!"

"Hello Professor Xiao, I will never ask you questions in the future."

…

"Ning Wei, this is your current senior brother Zhou Pingyan, who is also Director Tian's PhD. His current research topic is to calculate the Grnbner basis of Einstein's equations on flag manifolds."

"Hello, Senior Brother Zhou, please take care of me."

"Hello, Junior Brother Ning, to be honest, forget about others, why don't you just take more care of me?"

"Although you, Senior Brother Zhou, are quite humble now, he was very high-spirited when he first entered the courtyard. In the Qiu Shing-Tong Competition of the same year, he was just two points short of a Grand Slam."

"Okay, Professor Lu, don't be embarrassed in front of my junior brother. Now I just want to graduate with a doctorate smoothly! I'm so miserable right now. It's really worse than eating coptis!" Zhou Pingyan said with a sad face. .

Ning Wei was shocked!

There are many gold medal winners in the Qiu Chengtong competition, and they are dignified doctors from Peking University, but they are so embarrassed by a doctoral thesis?

How social is this courtyard?

However, Lu Dongyi seemed not to be surprised and asked casually: "Oh? What difficulties have you encountered recently?"

Something happened that stunned Ning Wei. Lu Dongyi's words were like a signal, and Zhou Pingyan immediately started the mathematical communication mode: "Yes, yes, Professor Lu, look, we have to define the flag manifold." There is a one-to-one correspondence between the T-roots of M^c and the complex irreducible ad(...) of the M^c square and the submodule mg, but now the complex conjugate mapping commutative subspace on the c square of the Lie algebra G cannot be proven to be unique . Do you think this is difficult? My argument is stuck here again. No matter how hard I think, I cannot define that any sub-algebra that satisfies the above requirements can be determined by the only invariant substructure on M."

Lu Dongyi thought for a while and said: "What if the invariant Riemannian metric g of a G on M is defined to be equivalent to Ad and AD(K) on m?"

Zhou Pingyan replied: "I have considered this, but we have to consider the invariant symmetry covariance on G/K, which will form an invariant symmetric bilinear type, which still cannot meet the above requirements, so the introduction The truth still cannot be proven.”

"Oh!" Lu Dongyi and Zhou Pingyan began to glare at each other, seeming to have entered a state of enlightenment at the same time.

Ning Wei is very annoyed.

What is this for?

You agreed to take him around the yard and then go arrange a place for yourself to work?

What's going on with the two of you looking at each other affectionately here?

Fortunately, he could understand a little bit of what the two people were talking about just now...

The main reason is that after learning that Director Tian was his future mentor, he studied Director Tian's thesis for a period of time, so he was not unfamiliar with the field of their communication.

"Senior Brother Zhou, why don't you consider assuming that the Lie algebra g and the Lie group G are directly equivalent to the tangent space at the unit origin, and then use the projection mapping G on M to directly point to G/K, so that Ad and AD ( on g and m K) are necessarily equivalent, thus inducing a unique linear mapping? Well, that, I don’t know if it’s right or not, I just suddenly came up with some ideas and discussed them with the two senior brothers.”

The two people looked at Ning Wei at the same time.

Especially Zhou Pingyan, who was in a trance at first. After that, his eyes opened wider and wider, and then suddenly burst out with a hot light. The radiating light made Ning Wei feel a little scared. However, before he could react, such a big man unexpectedly He opened his arms grandly and hugged Ning Wei directly with lightning speed, and then slapped his back hard with both hands.

"Junior brother, you are awesome, you are so awesome. I have been stuck on this problem for almost a week. I thought that if I couldn't figure it out, I would ask Director Tian to change the subject for me. I didn't expect it. I will definitely ask him next time. When you eat, eat the best food! When the time comes, it’s up to you to choose the Manchu-Han banquet! Your senior brother promises not to frown at all!"

After saying these words with great courage, Senior Brother Zhou finally let go of Ning Wei, then turned around and trotted away. Yes, he ran away without a trace, leaving a shocked Ning Wei and Lu Dongyi looking at each other.

Ning Wei felt that he had been hurt ten thousand and one points.

Although they are all majoring in mathematics, why is my senior brother so strong?

When he was hugged tightly by Senior Brother Zhou, he actually felt as if he was being tightly imprisoned by a strong man, with no way to break free! Really, what the hell! No wonder outsiders say that the School of Mathematics at Yanbei University is the first of the four major lunatic asylums in the school. On the first day, Senior Brother Zhou vividly proved to him that the rumors were true.

What’s even more disgusting is, what’s the point of inviting me to dinner next time? A full banquet between Manchu and Han Dynasties? If you are really sincere, can’t you do it today?

"Senior Brother Zhou, this is..."

"Ignore him, he often does this. The feeling of being stuck in writing a paper can indeed drive people crazy. You should have experienced it. As for you, have you ever done research on Kahler geometry?" Lu Dongyi asked speechlessly. road.

"I only understand a little bit about this, well, I understand a little about this, but I really understand a little about that." Ning Wei said with some guilt.

After hearing Ning Wei's words, Lu Dongyi was silent at first, and then said with a serious face: "Junior brother, can you sincerely promise me something?"

"What's the matter? Senior brother, just say it." Senior brother suddenly became so serious, which made Ning Wei a little uncomfortable.

"Please don't insult the word "slightly understand" in front of me in the future, okay?" Lu Dongyi said very formally.

This request...

"No problem, Senior Brother Lu, I only know a little bit about Kahler geometry, really, just a little bit."

Lu Dongyi: "..."

Feeling a little embarrassed, Ning Wei quickly changed the topic: "By the way, Senior Brother Lu, Senior Brother Zhou is stuck when he encounters a problem, why don't you just ask Director Tian?"

Lu Dongyi replied: "There is an unwritten rule in our mathematics community. Generally speaking, the thesis supervisors of doctoral students do not sign. Only in this topic, the doctoral student and the supervisor collaborate and the supervisor is the main contribution. The instructor will only sign the name when the author is writing. Do you know why this is the case?"

Ning Wei shook his head sincerely. Strictly speaking, he felt that he had not really entered the legendary mathematical circle. At best, he could only be regarded as playing in the mud outside the circle.

"I didn't quite understand it at first, but then I understood it. In our field, tutors generally help students choose topics and then don't care much about it. Think about it, if this topic encounters an extremely difficult problem, walk into it. What should I do if I have reached a dead end and even my supervisor can’t solve it? So generally speaking, after our doctoral students in the School of Mathematics have chosen a topic, they will only knock on the supervisor’s door after the thesis is completed. Unless those who chose this topic at that time At that time, I studied with my tutor.”

"Of course, that doesn't mean that the supervisor is completely indifferent to the doctoral students. During the doctoral stage, the supervisor mainly transmits his mathematical ideas to the doctoral students, but rarely explains the specific problem solutions to the doctoral students. Do you understand?"

Ning Wei nodded suddenly, I have to say, this is very mathematical!

…

After walking around the yard, Lu Dongyi finally took Ning Wei to his place in the yard.

I was in the same room as Lu Dongyi, in the southeast corner of the courtyard. Next to it was a small classroom that could accommodate about 20 people. It was not far from Director Tian's building.

"You stay here, stay with me during this period, and we can discuss any issues with each other." Lu Dongyi pointed to an empty desk and said.

In fact, the room is quite simple. There is an air conditioner, but it is not turned on. There was already a computer on Lu Dongyi's desk, and the bookcase behind him was filled to the brim with documents and books.

Ning Wei's desk was combined with Lu Dongyi's desk. Because the door was on the left behind the stool, the file cabinet left for him was placed on the other side. This makes the room, which is not big enough, look a little crowded.

If guests came in, all that would be left was the two wooden chairs next to his filing cabinet.

How can I put it, I am used to the modern laboratory building of Jiangnan University, but I am still a little uncomfortable in this quaint environment.

But when it comes to studying mathematics, if you don’t need a lot of calculation work, a notebook and a pen are enough, not to mention computer aids.

The best thing about this room is that you can see the Boya Tower in the distance through the window, and it's very close to you if you want to take a walk by Weiming Lake.

"Where is the place to live? You won't let me live in the guest house forever, right?" Ning Wei asked.

In fact, there is no problem in living in a guest house, and there are people helping to clean the house every day. The only problem is that it is not easy to settle in March. It would be hard for him to get a workstation and leave it in the guest house.

"This is not the summer vacation. The teachers in the logistics department are not here every day. But don't worry, I have made an appointment with the teacher and will arrange a doctoral student dormitory for you the day after tomorrow. However, the school's doctoral student dormitory has always been very tight, so the current implementation It’s an application system, you can just submit a supplementary application later,” Lu Dongyi replied.

"Senior Brother Nalu, does our doctoral student dormitory at Yanbei University have one room per person?" Ning Wei asked the question that concerned him most at this time.

Speaking of which, one person has one room, but it is just for the current needs!