Rule department scholar

"..."

Fan Lei found that he couldn't find a reason to refuse.

Li Renzhe couldn't help but said, "Zhao Yi, you see that Fan Lei doesn't want to go, otherwise I'll go, my elective course is German, I can speak a few words, and I only need 2 yuan, how about it?"

Zhao Yi glanced at Li Renzhe, imagined the embarrassing scene where he was standing on the podium, so nervous that he didn't know where to put his hands, and quickly shook his head and looked at Fan Lei again, "Six thousand dollars, no more!"

"OK!"

Fan Lei found out that there was a competitor, so he quickly nodded and agreed. The whole trip to country D will be reimbursed for a few days, and he can also show his face on the stage of the international awards, and he can also make a lot of money by the way.

This is definitely going to go!

"By the way, Zhao Yi, I heard that Hamburg in Germany is pretty good, and there's St. Pauli...hehe..."

"Ahem, you can go and have a look, but be careful."

"Am I that kind of person?"

"Is this not reimbursed?"

"I'm just saying, how can I have time!" Fan Lei said nonchalantly, "And I'm not interested in foreign countries."

Li Renzhe stood by and listened, and immediately said with great interest, "Old Fan, are you really going? St. Pauli, I've heard of it too. I heard that there are many beauties there, and they are still regular. Don't-off- Law."

"What doesn't-break-law?" Fan Lei asked suspiciously.

"It's... that, that, that you said?" Li Renzhe tried to explain in normal language.

Fan Lei said strangely, "We are talking about football. Next week and next week there will be a match between Hamburg and St. Pauli. The Hamburg Derby is very exciting. I want to watch the match. What are you talking about?"

Zhao Yi nodded in agreement.

"...I was also talking about a football match, the Hamburg Derby." Li Renzhe said weakly.

"I thought……"

Fan Lei suddenly realized, "Ren Zhe! When will your mind be healthier, and you are thinking about these things? You have Wen Qian, so what are you going to do? Tell me about you..."

"#@￥%..."

After being reprimanded for covering his face, Li Renzhe responded angrily, "Get out!"

Chapter 398 Einstein's Gravity Field Equation

New semester, new atmosphere.

Yanhua University has two major development-related events, one is the establishment of the Medical Science Center by the School of Life Sciences, and the other is the establishment of the Particle Mathematics Research Center by the School of Science.

The entire university is discussing the construction of the two scientific research institutions, and discussing the impact on the future.

This is relevant to each student.

The scientific research institutions in the university will be inclined to the direction of education, and students will have more choices after graduation. For example, seeking to work with a supervisor who works in the scientific research center is equivalent to studying for a master's degree in the scientific research center, and then studying for a doctorate after graduation, or Just stay and work in the scientific research center.

and many more.

The medical science center is preparing to be built, and the blueprints of the building have been designed. The only thing left is to wait for the official start of construction in the spring. The equipment for the large laboratory is being ordered, and some other internal work.

For example, talent introduction is already in progress.

The Particle Mathematics Research Center is still under planning, mainly because the school has no autonomy, and everything depends on the support of the Science and Technology Department.

Many people hope that Zhao Yi will pay attention to this matter. The Science and Technology Department allocates funds for Zhao Yi, but Zhao Yi does not want to interfere in this aspect. He only made a promise that when the Particle Mathematics Center is established, his office will be Move over directly.

He reluctantly agreed to this matter, mainly having an office, which did not conflict with the office of the Faculty of Science.

Zhao Yi didn't want to get involved in the Particle Mathematics Research Center. One reason was that he didn't want to increase his workload. The problem of the office also involved 'location'. The Particle Mathematics Center can only be built on the west side of the university, and only there is vacant space. It is closer to the business school, but far from the staff dormitories, general teaching buildings, and biomedical research institutes.

Although the distance is only a few hundred meters, it always feels a little depressing to run two extra steps.

First week of school.

Zhao Yi's life is relatively busy. He went to participate in the National Science and Technology Awards Conference and received a 'Natural Science First Prize'. Zhang Wei from the laboratory received the 'Science and Technology Progress Second Prize' as a representative, which was the same as last year. Compared with the award received by the laboratory, it is not a grade, but it can be regarded as an achievement to win the award for two consecutive years.

Zhao Yi's feeling was a little calmer. The people in the laboratory were very excited, but the rest of the research institute could only envy Zhao Yi's laboratory. They couldn't get a prize even if they wanted to.

Reports in the media were muted.

Most of the media just talked about, "Zhao Yi won the Natural Science Award for his proof of Goldbach's conjecture."

Then, no more.

Probably because everyone is used to it, it is no surprise that Zhao Yi has won awards for several years in a row.

This is also good news.

When there are not too many media reporters to disturb, Zhao Yi's life becomes a lot easier, and he can enjoy a few days of normal university time.

weekend.

Zhao Yi is still busy. His plan is to go to the Mathematical Science Center of Shuimu University and discuss with Qiu Chengwen about "cosmology" and "positive energy of solutions of Einstein's equations".

Qiu Chengwen is a very good mathematician with high achievements in theoretical physics research. He proved that any solution of Einstein's equation must have positive energy.

Qiu Chengwen must have a deep understanding of this aspect.

Zhao Yi felt that discussing with Qiu Chengwen might be helpful to his particle mathematics research.

When the call came, the trouble came again, Qiu Chengwen invited him to give a lecture at Shuimu University, "Chen Jingrun's series of lectures will be held on the weekend, the main core is the problem of complex sieves, no one is more suitable than you, a master of number theory. "

He added in a distressed tone, "If you don't come, I will."

Zhao Yi knew that Qiu Chengwen was "selling bitterness", but thinking that the other party would be a thesis reviewer for him, he would help when there was something he could help, and his personal relationship was also very good. , "Okay. After the lecture is over, let's discuss particle mathematics together. I am very interested in cosmology and Einstein's equations."

"It's great that you can come, no problem, academics just need to communicate more." Qiu Chengwen readily agreed.

The basis of Qiu Chengwen’s final statement, “academics are about communication”, made Zhao Yi deeply touched. His academic achievements are indeed remarkable, and can be said to have reached the world’s top level, but the more he does research, the more he discovers. , My own knowledge is still a bit poor.

When academic research reaches an extremely advanced level, any small branch will use a huge amount of knowledge, and ordinary people may not be able to learn a small branch if they devote their entire lives to study.

Zhao Yi found that his research on particle mathematics was limited by the "amount of knowledge", and all his thinking was based on the knowledge he had in his mind.

That's the limit.

In fact, it is the same as understanding multi-dimensional space.

Even the top mathematicians use mathematical techniques to understand spaces above four dimensions, rather than building real effects in their minds like three dimensions.

This is the limit of the amount of human knowledge available.

Human beings are limited in the three-dimensional universe, and all the knowledge they acquire is within the framework of the three-dimensional universe. Without the knowledge and insight beyond the three-dimensional universe, how can they know what multidimensional space looks like?

That's why some people say, "Human beings will never be able to imagine what a space above four dimensions looks like."

Zhao Yi found that what he needed to do was to acquire more knowledge, and he continued to study particle mathematics. The knowledge he needed was not only found in books, but he had to do more academic exchanges and get to know other top mathematicians, physicists Scientists, cognition and research in related fields may have an enlightening effect on his thinking.

……

weekend.

Shuimu University held the "Chen Jingrun Lecture Series", and Zhao Yi came to the Department of Mathematics of Shuimu University as scheduled.

The Mathematics Department of Shuimu University is really sincere towards Zhao Yi. He not only gave lectures, but also received an 'Honorary Doctorate' and the title of 'Honorary Professor' by the way.

Zhao Yi doesn't care about doctorate, professor and so on, but it's pretty good to give him a title.

It was only a dream to be admitted to Shuimu University in his previous life, but now he has become a Ph.D. or a professor just by coming here, and he feels very good in his heart, so he also made preparations for the lecture.

Qiu Chengwen said that the content was "complex screening method issues", and Zhao Yi also prepared for the screening method.

He is very good at this.

Chen Jingrun proved Goldbach's conjecture '1+1=2' by using the most basic sieve method. He applied the sieve method to the extreme, and proved Goldbach's conjecture to the extreme.

The sieving method is very simple at first, it is to list the numbers one by one, and 'screen out' the multiples of the previous numbers.

The main core of what Zhao Yi said was the expression of the sieve method.

In the conference hall with more than 400 people, he patiently spoke step by step, "We can see that the initial expression is very simple, but later we must use some means."

"The first is to add limits..."

Zhao Yi did not need to think about the process of speaking, it was a step-by-step detailed demonstration. Many steps did not need to be calculated, and the results could be obtained directly. The demonstration on the whiteboard was very clear, which made people feel refreshed.

It really wasn't difficult for him.

What Zhao Yi is best at is the "cumulative" mathematical method. The method is very simple, and it becomes difficult after superposition, but because the basic method is very simple, "The Law of Cause and Effect" and "Contact Rate" do not need to consume energy. Once the brain is almost out, and then the process is clearly listed, it will naturally feel very clear.

offstage.

Sitting in the first two rows were big bosses from Shuimu University, Qiu Chengwen was sitting in the middle, and taking advantage of his spare time, he turned his head and said with emotion, "If it were me, I couldn't speak better, as expected of Zhao Yi !"

"Yeah, that's great!"

"It's hard to imagine. He's only in his early twenties. He's probably the youngest here, younger than the students."

second row.

The only Chinese winner of the Turing Award, Yan Zhixing, who founded the "Shuimu Yan Class", looked at Zhao Yi on the stage, and felt a little emotional in his heart. He remembered that three years ago, the admissions office of Shuimu University asked him if he Wanting Zhao Yi to enter his 'strict class', he considered that Zhao Yi was 'too talented' and felt a little unsure, so he didn't express his opinion.

Later, knowing that Zhao Yi proved Kakutani's conjecture, he thought with some fear, "Fortunately, he didn't come to my class!"

At that time, he still had some regrets.

As long as he is engaged in education, everyone hopes that his students will have a very outstanding student. It is indeed difficult to grasp a genius, but it is a pity to miss a genius.

Now Yan Zhixing doesn't feel regretful at all, he just feels very lucky, otherwise what should he do in the current situation?

The students are on stage and the teacher is off stage?

"I don't know Yanhua University, what kind of mood are those who give lectures to Zhao Yi..." Yan Zhixing suddenly admired the teachers of Yanhua University so much that he dared to give lectures to Zhao Yi.

How do you say this?

Now that Zhao Yi is standing on the stage, he can speak better than him. If it is rumored that he is Zhao Yi's teacher, people will probably look at him with strange eyes, and then ask suspiciously, "What did you teach Zhao Yi?"

"I really can't figure it out!"

Amid the emotions of many people, Zhao Yi easily completed the lecture and received enthusiastic applause at the end.

Everyone thought that Zhao Yi's speech was very good.

Some students who couldn't keep up with their train of thought felt that they had learned a lot, and couldn't help giving Zhao Yi applause.

Seen off by applause, Zhao Yi stepped off the stage and was arranged to rest at the back. Afterwards, everyone from Shuimu University arrived and exchanged pleasantries. He followed Qiu Chengwen to the Mathematical Science Center.

The Mathematical Science Center of Shuimu University has been established, and scientific research and teaching have been developed. Qiu Chengwen has a large office, and several mathematics professors came together.

Zhao Yi began to ask questions on the way, he hoped to understand some cosmology, and the content of Einstein's equations.

Einstein's gravitational field equation is used to describe that 'gravity is caused by the curvature of space-time produced by matter and energy', which is directly related to Zhao Yi's addition of gravitational elements to the particle boundary theory.

Zhao Yi hopes to find some inspiration.

Chapter 399 There is nothing perfect in the world

Einstein's gravitational field equation is the description of gravity and gravitational field.

In Newton's theory of universal gravitation, mass is the source of gravity, that is, neutrality can be produced with mass, while Einstein's theory of relativity further points out that both momentum and energy can be used as the source of gravity, and interprets the "gravity field" as 'Time Warp'.

Using Einstein's gravitational field equation, knowing the distribution of matter and energy in space-time, the curvature of space-time can be calculated theoretically, and the result of space-time curvature is gravity.

Einstein's gravitational field equation is not complicated to explain, but in fact, its description content is very complicated, and a simple decomposition can be divided into a system of ten equations.

Such complex equations are enough for later mathematicians and physicists to conduct decades or hundreds of years of research.

Qiu Chengwen has done research on Einstein's equations, he mainly analyzed them with mathematical methods, and finally proved an important result of Einstein's general relativity——

Any solution to Einstein's equations must have positive energy.

What does that mean?

Positive energy means that there is energy, not anti-energy, just like there are apples on the table, its number is always positive, and there cannot be '-1' apples.

These may sound like nonsense, but they are very valuable in terms of mathematical thinking, and in terms of understanding the laws of the universe, there is only positive energy, no negative energy, and there will never be an ideal zero state, that is, a steady state. This means that space-time is always unstable.

Therefore, the eternity that people see is moving.

Qiu Chengwen's proof of Einstein's gravitational field equation is very valuable in the field of theoretical physics research. The famous "black hole physicist" Steven Hawking has talked face-to-face with Qiu Chengwen about Einstein's equation Problem, because the proof of 'equation positive energy' is directly related to the proof of black hole.

Now Zhao Yi also needs similar theoretical content. He came to Qiu Chengwen mainly to exchange his understanding of Einstein's equations, and to expand his understanding of Einstein's equations to talk about cosmology.

While walking on the road, the two had already started a discussion.

This is mutual communication.

Qiu Chengwen's research on Einstein's equations has achieved results, but Einstein's equations are very complicated, and there are not only "characteristics of analytical solutions" but also many other problems.