Xueba: I study hard in the wasteland world

Chapter 199 197, Professor Diongo Eaton who will stay at NPU

Su Yu can be excited to play games for several days in a row, and of course she can also be excited to write papers for several days in a row.

When inspiration strikes, the sense of achievement and fulfillment of serious study is even more addictive than playing games. From the moment Su Yu started sitting at his desk writing a paper, he couldn't stop.

Even eating, drinking, and going to the toilet are completely subconscious actions. If Su Yu were asked to think about whether he had eaten or not, Su Yu would not be able to remember at all, because his brain, which was completely occupied by papers, would not have time to do it. Record whether you have eaten or not.

At first, Su Yu was stumped by this "group theory", but now that she thinks about it, it's not that difficult!

What is a "group"?

A group is a set G, together with an operation ".", which combines any two elements a and b to form another element, denoted a. b. The symbol "." is a general placeholder for a given operation, such as integer addition. To qualify as a group, this set and operation (G,.) must satisfy four requirements called group axioms:

Closure: For all a and b in G, the result of operation a.b is also in G.

Associativity: For all a, b and c in G, the equation (a. b). c = a. (b. c) holds.

Identity element: There is an element e in G such that for all elements a in G, the equation e. a=a. e=a holds.

Inverse element: For each a in G, there is an element b in G such that a. b=b. a=e, where e is the identity element.

There is not a single symbol, not a single Chinese character, not a single letter on the black paper that I don’t recognize.

What’s the problem?

A set and a binary operation satisfy the four axioms of group theory. Isn’t this group theory? How simple!

Therefore, the "group theory" that originally troubled Su Yu was now as simple as a high school student doing elementary school math problems for him!

In the study, the excited Su Yu calculated eloquently:

".

The rational algebras of the two are isomorphic, or we can simply say SU(2)=SO(3):

Considering [2Ti, 2Tj]=2ieijk2Tk, compare [σi, σj]=2ieijk.σk

It is not difficult to find that the two are three-dimensional real linear spaces with the same structural constants, so they are basically the same Lie algebra.

We can build an abstract algebra g:

Assume that the three elements J1, J2, and J3 satisfy the commutation relationship [Ji, Jj]=2i2ieijk.Jk

"

This kind of extremely smooth eloquence made Su Yu feel very enjoyable, just like filling in the blanks of the postgraduate entrance examination English one and completely understanding it very smoothly.

For the entire month of July, Su Yu did not leave home.

Of course, his game room has been empty for a whole month, and he hasn't finished the newly purchased game yet, so he doesn't care at all, let alone wants to play it.

"Finally done!"

On the last day of July, Su Yu, who was sitting in her study, browsed through dozens of pages of papers and PPTs in a Word document and stretched out as if burdened with a heavy burden.

Originally, Su Yu thought that she would be able to complete this report article in one month at home, but Su Yu still underestimated it, and one month was simply not enough time.

Su Yu not only spent a whole July in the real world, but also spent two months in the wasteland world to write these dozens of pages of papers and PPT reports.

Su Yu felt that her "golden finger" came too late!

If I had this "golden finger" in middle school, why would I still be afraid of not being able to complete my homework?

You can go home from school and play crazy, and travel to the wasteland world to make up for your homework a second before going to school!

Xijing, Xijing Jiaotong University, two old white men were wandering on the campus of Xijing Jiaotong University with their hands behind their backs.

Teachers and students majoring in mathematics at Xijing Jiaotong University were very excited when they saw these two old men. These two seemingly inconspicuous old white men were world-class leaders in their fields!

These two old men are not professors at Xijing Jiaotong University. One of them, Professor Diongo Eaton, is the chairman of the last World Congress of Mathematicians, a professor of mathematics at Princeton University, winner of the Fields Medal in Mathematics, and an internationally renowned mathematician;

One is Professor Bob Magath, a professor of mathematics at New York University and the director of CIMS, the top-ranked applied mathematics institute in the United States.

The two of them came to participate in the World Congress of Mathematicians held in Xijing City. Compared with other participants who like to visit busy tourist attractions, Professor Diongo Eaton and Professor Bob Magath are more interested in the local culture. Interested in the campus atmosphere of colleges and universities.

So the two met and walked on the campus of Xijing Jiaotong University, slowly experiencing the academic atmosphere and atmosphere of this university.

It was late July or early August, and it was very hot in Xijing City at this time. The two old professors who were tired from shopping bought a cold drink, found a shady step to sit down and rest, and started a simple conversation.

The two first sincerely praised the campus atmosphere of Xijing Jiaotong University. The high spirits and positive efforts of every student here were really touching.

Then, they brought the topic to this year’s World Congress of Mathematicians:

Professor Bob Magath said: "I'm still looking forward to Professor Su Yu's report at this conference!"

Professor Diongo Eaton took a sip of the cold drink, nodded in agreement, and said:

"I heard that his report was about group theory. His work at CERN impressed me. If anyone can make a breakthrough in the field of group theory this century, I believe it must be him!"

Professor Bob Magath nodded and said: "Since his work at CERN, humankind's high-energy physics, quantum mechanics, quantum chemistry and other related fields have made full progress!"

Professor Bob Magath continued to express his views: "I have always firmly believed that mathematics is the foundation of all sciences. The key to Professor Su Yu's ability to achieve such high results and bring development to all disciplines is Because he brings a new kind of mathematical logic!"

"Hey!" Professor Diongo Eaton sighed and said, "It's a pity that mathematics is a subject that only favors geniuses, and it only favors young geniuses. To use a popular Chinese saying, they only like young talents. !I’m getting old! I can’t keep up anymore!”

"Hahaha!" Upon hearing Professor Diongo Eaton's fluent Chinese, Professor Bob Magath smiled and praised: "Your Chinese level is great!"

Professor Diongo Eaton nodded proudly. As an old man, he had to put in a lot of effort to learn a language again. He said, "I'm going to be in China, so of course I have to learn Chinese!"

"Ah? Did I hear you right? Diongo, do you want to stay in China?" Professor Bob Magath was shocked after hearing what Professor Diongo Eaton said.

Professor Diongo Eaton nodded and said, "Yes, I have accepted the letter of appointment from NPU. I will stay in China, just in this city!"

Professor Bob Magath felt a little shocked, but he thought it seemed reasonable!

Professor Diongo Eaton continued: "I am already old. I don't want or desire to have any new achievements."

"Now I just want to teach quietly and spread my knowledge of mathematics, thereby improving the overall mathematics level of mankind."

Professor Diongo Eaton's eyes were filled with excitement as he continued: "In the past few years, I have been to many universities one after another, but I chose to leave Princeton and stay in China and NPU."

"Bob, you know, I really like the seriousness and hard work of the students here. There is a desire for knowledge in their eyes!"

“As for Princeton, it’s not the same Princeton it was before!”

"I want to stay here, concentrate on teaching, and improve the understanding of advanced mathematics for this group of children."

"I believe that in the future, they will definitely create new miracles for human civilization!"

After listening to Professor Diongo Eaton's excited explanation, Professor Bob Magath didn't say anything and sat quietly under the tree and took a sip of cold drink.

Behind the steps where Professor Bob Magath and Professor Diongo Eaton were sitting, several students majoring in mathematics at Xi'an Jiaotong University were arguing fiercely in the teaching building classroom:

"This is wrong!"

"The so-called C1-dimensional linear representation is to map the elements in the target set to a linear transformation on the C2-dimensional space.

This mapping should preserve the operations (i.e. homomorphism) in the original set. The real space is the real representation, and the complex space is the complex representation."

"No, no, no, we can re-adjust it based on the SYI model used by Professor Su Yu for black hole analysis at CERN."

Today is the weekend, and these students did not make an appointment to go out to play, but made an appointment to come to the empty classroom to "debate".