The unparalleled talent of the country started from Harbin Institute of Technology

Chapter 182, You have to be on guard against me too?

On June 29, 1981, in the ice city of northern China, on the campus of Harbin Institute of Technology, in a conference room in the simulation software project office area, a crucial meeting that would determine the direction of the project was underway.

Wang Duoyu, sitting in the main seat in the center, was talking.

Wang Duoyu has been waiting for the simulation software project, and even now, the time is not ripe.

But if Wang Duoyu didn't want to cut off the fate of the Fluent software, he wouldn't even have released the simulation software so early.

From the very beginning, simulation software was designed to be helpful in designing aircraft, so everything else was temporarily ignored.

You should know that CFD in later generations involves aerospace, chemical industry, automobile and shipbuilding, HVAC engineering, petrochemical industry, etc.

In chemical engineering, computational fluid dynamics simulation software technology can accurately describe the fluid flow, mixing and heat transfer laws in chemical processes, and gradually couple them to chemical reactions.

The combination of computational fluid dynamics and chemical reaction kinetics makes numerical simulation of non-ideal reactors possible and has enormous application potential.

"We all know that all aircraft require extensive wind tunnel testing during their design process. If we can help these research institutes or companies reduce wind tunnel testing, wouldn't that save a lot of money?"

"What we need to do now is to explore the two major areas of aerodynamic design and control law verification in the aviation field. I believe that aircraft companies around the world will be very interested in these two technologies."

After listening to Wang Duoyu's words, Jiang Boju, Swithenbank, Fan Honggeng and others nodded silently.

This computational fluid dynamics simulation software has many core technologies, such as the geometry engine, mesher, post-processor, tetrahedral mesh generator, climbing solver, etc., which have been started before, and most of them have been completed.

At present, Wang Duoyu has made it clear that he will first explore the two major projects of aerodynamic design and control law verification. Once successful, they can be commercialized immediately.

On the contrary, other fields such as chemical industry, automobile and shipbuilding, HVAC engineering, etc. have temporarily suspended project research and development.

In fact, the research and development of aerospace fields, such as aeroelasticity, plasma active control, multi-physics field coupling, and digital flight, have also been suspended.

Wang Duoyu wanted to start all the small projects in the aerospace field at the same time, but it was unrealistic because there were not enough talents.

Timing is very important!

Although Lin Dehong strongly supports the computational fluid dynamics simulation software project, it is extremely difficult to get real money and support that will be met whenever requested!

Especially when it comes to foreign exchange support in US dollars, it is not that simple.

Now, this project has recruited 18 foreign technical experts, which has made the leaders above anxious.

If this project fails to meet expectations, it will definitely fail in the womb.

"For example, we all know that the angle of attack and deflection of the wings during flight play an important role in improving the flight performance of the aircraft."

"The nested grid technology I designed earlier can be fully applied to this type of aerodynamic model, such as vibration and noise control analysis of rotorcraft and airfoil oscillation."

"Team Leader Fan, do you remember what I told you about analyzing oscillating airfoil motion? If we successfully develop these two projects, we can use this software to design geometric models based on the aircraft company's requirements and simulate the airfoil's deflection during motion."

"We also use nested grid technology to generate separate airfoil-fitting grids to perform fluid dynamics simulations on large-scale moving grids."

Fan Honggeng, who was called, nodded inexplicably nervously.

Of course, he still remembered the so-called analysis of oscillation wing motion technology, which was simply the devil.

Because it’s too difficult!
Designing an airfoil geometry model on computer software is not difficult, and it is even a bit simple, because Fan Honggeng has not been doing nothing in the past few months.

After the model is designed, the geometric model must first be meshed using an unstructured mesh generation tool. This mesh is a nested mesh that is divided into a background mesh and an airfoil body-fitted mesh.

Among these grids, there are indicators such as maximum aspect ratio, minimum volume, and maximum skewness to measure the aircraft model.

The second step is the analysis and simulation of physical parameters and boundary conditions, followed by the solver settings, and finally the final analysis of the post-processor.

A large amount of data analysis and model analysis will be applied in the entire process. These technologies are very advanced for many people, so we want to design such an application software.

Not only do we need high-performance computers, but we also need a large number of R&D talents. Only in this way can we complete the corresponding project engineering.

After a simple technical analysis, Wang Duoyu said:
"From now on, all our funds and personnel for the entire project will be concentrated on these two small projects. It would be best if they can be completed before August. Then we can seek cooperation with those aircraft research institutes."

This is all Wang Duoyu has to say about commercialization. We can only wait until August to discuss further details.

The meeting did not last long, just less than an hour, and then it ended.

Wang Duoyu walked out of the meeting room and suddenly thought of something, but at this time everyone stood up and prepared to leave, so he did not go back.

Instead, he called Fan Honggeng and the others aside and told them:
"After August this year, we will begin commercial operations, which means that after August, simulation software will usher in a different development."

“I plan to set up a company in August. By then, the entire project will be run as a business, and the profit model will be a very important node.”

"If any of you want to switch from a purely technical position to an administrative position, I fully support you, but you also need to make relevant preparations in advance and pay more attention to the entire project."

“In the future, we will launch an operating model with multiple field teams, each focusing on sales in a specific industry sector.”

Fan Honggeng and the others looked at each other, their spirits suddenly tensed up.

Wang Duoyu was not acting on impulse, but the cost of the computational fluid dynamics simulation software project was indeed too high, and talent was also a huge limitation.

Therefore, if we conduct commercial operations in a corporate manner, we will only talk about money and nothing else.

"Professor Wang, what is the operating model of the field team?"

Liu Qigang asked, and Fan Honggeng and the others were also very curious. Wang Duoyu smiled and replied:

"It's simple. We developed a simulation software specifically for the aerospace field, so we definitely need a dedicated sales, marketing, customer support, and consulting staff."

This operating model is more conducive to management. After all, simulation software dedicated to the aircraft field must have different requirements for other aspects of the software.

For example, in the field of aviation aircraft, taking an ordinary aircraft as an example, the wing-body combination calculation uses nested grids to improve the grid quality of areas such as the wing-body junction. The number of grid cells may need to be around 5 million.
At the same time, a specific turbulence model needs to be adopted, and this turbulence model not only needs to be calculated, but also needs to be designed and programmed.

The convection term adopts a specific format, and the numerical iteration uses the implicit Wang Duoyu algorithm and the multigrid method to accelerate convergence.

Two working conditions, Mach numbers M=0.75 and 0.95, were tested respectively. The airflow angle of attack was 1.23° and Re=3.0e6. The simulation results, such as the standard model aerodynamic drag and lift coefficient and the standard model pressure coefficient distribution curve of the wing when M=0.75, can be compared and analyzed with the relevant experimental results.

Referring to the above example, a company needs a lot of simulation technology support when designing an aircraft, and at this time those companies will definitely need a lot of consultation.

Therefore, it is necessary to send a technical team to provide on-site guidance, and this is technical support.

On this day in 1981, there was a simulation software company in the UK called CHAM, whose full name was Concentration Heat And Momentum Limited. It was a consulting and software company established in 1974.

CHAM currently specializes in computer simulation of fluid flow and heat transfer processes, mainly providing services such as software development, model building and application consulting.

CHAM is the commercial competitor of Future Simulation Software.

Fluent in the original time and space was afraid of competing head-on with CHAM, so in the early stages of market promotion, they directly focused on the combustion field, especially gas turbines.

At that time, Fluent added physical models for handling entrained droplets and particle motion, and integrated these models into an interactive user interface, making their software stand out.

In addition to CHAM, companies that provide commercial fluid analysis software packages are also a major competitor.

But it’s too early to talk about these competitors now, there’s no rush.

After hearing what Wang Duoyu said, Fan Honggeng, Liu Qigang and others nodded in sudden realization.

Indeed, such a management model would be very good indeed.

But what about sales?

"No rush. We can discuss this after you've developed all the technologies needed to launch the design and control law verification projects."

Wang Duoyu said with a smile, and after that, they chatted for a while and then left.

Wang Duoyu obviously has a lot of ideas about sales, but there is no rush now.

Back at the Mathematics Department teaching building, Wang Duoyu took a look at the completed warm corridor and nodded repeatedly.

When winter comes, these warm corridors connecting the major teaching buildings, dormitories, canteens and other places will be of great help.

The ice city in winter is extremely cold. The temperature is dozens of degrees below zero, and even a breath can freeze into ice chips. Add to that the biting north wind blowing from Siberia, and when it blows, it can really make people shiver with cold.

In the summer, the temperature in the ice city is generally around 14 to 25 degrees, which is not very hot.

There may be a few days in a year during the dog days of summer when the temperature can reach over 30 degrees Celsius, but this is only during the day. At night, it will still drop to around 10 degrees Celsius.

After stepping into the office and sitting down, Wang Duoyu began to think about one thing: What should I do next?
It’s not that he is very idle recently, but the final exams will soon be over, and he will soon go to Mohe to hunt. What should he do next after he returns from Mohe?

In other words, in addition to working on those projects, he must have his own things to do.

As a mathematics professor, Wang Duoyu would definitely not be content with being ordinary, only leading six students including Bochers and Yang Nianzhen, and having nothing of his own to do.

If it were someone else, they could just lie down and give up.

But Wang Duoyu is unwilling and will not give up just like that. Mainly because a life that can be seen at a glance would be too boring.

Moreover, the trouble he encountered with the top-level problem of Yang-Mills existence and quality gap was really too frustrating.

As a mathematics enthusiast, he encountered quite a few mathematical problems, both in his previous life and in this life, and he had let go of many of them, but the only problem he could not let go of was the Yang-Mills existence and quality gap.

The formal statement of this problem should be: prove that for any compact, simple gauge group, the Yang-Mills equations in four-dimensional Euclidean space have a solution that predicts the existence of a mass gap.

This difficult problem lies the secret of the world of microscopic particles and the key to the grand unification of the universe.

As we all know, there are many difficulties in unifying gravity with the other three forces. Even Einstein, who spent more than 30 years on this task, still failed to complete the unification of gravity and electromagnetic force.

However, the solution to the Yang-Mills existence and mass gap problems will make it possible to unravel the mysteries that physicists have not yet understood in the world of microscopic particles and incorporate gravity into the basic model.

Therefore, it is extremely difficult for Wang Duoyu to derive and prove this nonlinear partial differential equation.

"Forget it, let's talk about it later. Right now, I'd better go and solve other problems."

Wang Duoyu looked at the unresolved mathematical problem on the manuscript that he wanted to complete. His eyes moved away from the problem of Yang-Mills existence and mass gap. After thinking around, he finally locked on the problem of the existence of Navier-Stokes equations and the smooth line problem.

Why tackle this issue?
First of all, you need to know that the Navier-Stokes equation is the most complicated formula in the history of mathematics, and underneath it is Newton's second law of motion.

In rectangular coordinates, the vector form of the Navier-Stokes equations can be expressed as: =-p+ρF+μΔv, where ρ is the fluid density, p is the pressure, u, v, and w are the velocity components of the fluid at point (x, y, z) at time t, and μ is the dynamic viscosity coefficient. This equation describes the motion of a fluid element under the action of an external force.

As we all know, the Navier-Stokes equations provide a very accurate method to calculate the motion of fluids. Its solution is the velocity field, which is a vector field.

For every point in the fluid, at any instant, it gives a vector representing the velocity of the fluid at that point at that instant.

Unlike classical mechanics, studying velocity may not be very meaningful, but the streamlines of the velocity field are the paths that fluid particles travel. Through the streamlines, we can intuitively see the behavior of the vector field at a certain point in time.

After calculating the velocity field, other fields such as pressure, temperature, and density can be calculated using the relationship between dynamic equations and physical quantities.

Since the Reynolds experiment in 1883, the Navier-Stokes equations have been hailed as an unsolved mystery in classical physics. Heisenberg even listed it alongside the theory of relativity as one of the two unsolved mysteries in his mind.

Although it is widely used to describe turbulence and performs well in engineering applications, the existence and smoothness of its strong solutions have not yet been mathematically confirmed.

So it is difficult, but Wang Duoyu still wants to solve it.

The reason is very simple. The current simulation software project is in progress. At present, he has a deeper and more intuitive understanding of this equation, so he wants to derive a solution to this problem first.

After determining the next problem that needed to be deduced, Wang Duoyu began to make arrangements.

First, find information!
However, this time he couldn't just look for information casually on his own, because he didn't want others to know that he was deducing a solution to this problem.

why?

Because Leray had proved the existence of weak solutions to the Navier-Stokes equations in 1934, strong solutions, that is, solutions that can satisfy the equations at any point in the flow field, are still the goals pursued by mathematicians.

A strong solution means that the flow state at any point in time can be accurately predicted from the initial state.

If this thing has really been proven, then for foreign countries, especially the United States, it would be like having wings and flying completely.

You should know that with the development of computer technology, numerical methods have become an important tool for solving the Navier-Stokes equations. Various numerical methods have been widely used, which has improved the efficiency and accuracy of solving complex flow problems.

Even though the strong solution has not yet been proven, the Navier-Stokes equations have such wide applications that they have promoted the development of science and technology in the Western world.

If Wang Duoyu is lucky enough to prove the strong solution of the Navier-Stokes equations, and it is known to countries such as Europe, the United States, and the Polar Bear Empire, then he will definitely not be able to live in peace, and the engineering-related scientific research projects in these countries will make a qualitative leap.

Perhaps Wang Duoyu became famous in Europe and the United States because of this, but this is not what he wanted to see.

Of course, the premise of all this is that he can really prove the strong solution of the Navi-Stokes equation.

The second is to apply for an independent office.

The math problems this time are not that simple, so he needs to devote his full attention to them, and in some cases, he may even need to use a computer.

Take computational fluid dynamics simulation software for example. This thing needs to be continuously updated because fluid mechanics is too complicated.

Wang Duoyu knows many numerical methods used in scientific research to solve the Navier-Stokes equations, such as the pseudo-spectral method, finite element method, spectral method, discrete method, recursive method, construction method, approximate substitution method, etc.

The so-called numerical analysis method is actually to divide the space into discrete grids, discretize time, and then adopt appropriate numerical methods. The solution of the Navier-Stokes equations can be simulated by computer, which helps to understand the turbulence, boundary layer and other behaviors of fluid motion.

However, in order to verify these methods, models are needed for verification. Of course, Wang Duoyu can also perform these calculations through his own powerful brain, but he is a human, not a machine.

Therefore, the best way is to use computers to complete some complex calculations, or to have an additional path to ensure that your calculations are correct.

This kind of calculation naturally requires a large amount of computing resources, so not only do you need to apply for an independent office, you also need to have high-performance computing resources.

In short, one word: money!

After clarifying the target, Wang Duoyu found Lin Dehong with just one phone call.

When the latter learned that Wang Duoyu had a project to discuss with him, his pupils suddenly dilated and he was extremely happy.

Half a day later, Wang Duoyu came to an office building several kilometers away from Harbin Institute of Technology and met Lin Dehong.

"Boss, long time no see, I'm here to ask you for help."

After the meeting, Wang Duoyu went straight to the point and directly asked the other party to help find information.

Most of the books, papers, and works related to the Navier-Stokes equations are published in foreign countries, and there are indeed very few in China.

Who has caused the current situation in our country to be like this? Being backward is the most frustrating thing.

"Duoyu, is this equation you're talking about very useful? Is it very troublesome to collect this information?"

Lin Dehong asked curiously. "It shouldn't be hard to find, but the problem is I don't want to look for it myself, and I don't want anyone else to know I'm looking for this information. I don't even want anyone to know I'm researching this problem."

"why?"

Hearing this, Lin Dehong suddenly became even more curious.

It seems like there is some secret!

Wang Duoyu briefly explained, and Lin Dehong suddenly became serious:

"Is this equation really that powerful?"

"Of course, Boss, you're aware that I previously established a computational fluid dynamics simulation software project. I should have told you that if this software project is successful, it will undoubtedly have a significant impact on the existing engineering system."

After a pause, Wang Duoyu continued:

"There are two fluid dynamics consulting companies in the UK. One is called CHAM, and the other is a fluid analysis commercial software package company. Both companies were established in the last seven or eight years."

"This is part of the application of the Navier-Stokes equations. However, computer technology wasn't developed yet, so there weren't many competitors. Furthermore, the profit margins weren't very high, but it was still a very cutting-edge technological application."

"The most important thing is that once the strong solution to the Navier-Stokes equations is proven, it will overturn the existing landscape of computational fluid dynamics and promote the development of multiple fields."

"Our country's cutting-edge technology and industrial base are already very backward, so the mathematical theoretical equations with powerful applications in this area should not be known to other countries. It is best to keep them hidden."

"I trust you, Boss, and I need your help collecting information. I also need you to help me purchase computers and other related materials. As for funding, you can go through our Harbin Institute of Technology channels."

Now that I have said this, if Lin Dehong still doesn't understand, then he has really wasted his time.

Since the Navier-Stokes equation problem is so important, it naturally needs to be kept strictly confidential.

"Don't worry, Duoyu, I will definitely help you collect this information and keep it confidential."

"However, you don't have to worry about the funding. Our company will definitely be able to help you solve it."

Upon hearing this, Wang Duoyu smiled and asked, "Leader, are you sure?"

Lin Dehong felt uneasy for a moment when asked this question, but after thinking about it carefully, it seemed that there was not much money to be made in this pure theoretical research of mathematics, so he nodded immediately to show that he was very sure.

"Boss, let me calculate for you what materials I need for this project."

Immediately, Wang Duoyu started counting on his fingers, and Lin Dehong's expression became stiff at a speed visible to the naked eye.

According to the computer accessories such as processors and display screens that Wang Duoyu purchased, they could not be purchased without several million US dollars.

This only counts the spare parts imported from abroad, not including those purchased domestically.

In this era, there is no computer component that is not expensive.

Take the previous IBM3380 as an example. It only has 1GB of hard disk storage. If it were sold thirty years later, it would only cost a few hundred dollars at most.

As a result, in this day and age, the basic model of IBM 3380 costs as much as $, and that's not counting other models.

If you want to change this situation, you must wait for the Harbin Institute of Technology's memory project to improve hard disk technology and reduce production costs. Only then will Wang Duoyu be able to get high-quality and low-cost hard disk storage.

"Based on the above data, it might cost around 3 million RMB and 5 million USD. Boss, are you sure you want to invest?"

Lin Dehong was dumbfounded and didn't come back to his senses for a long time.

After a while, he said:

"Are you itching for trouble? You dare to laugh at my joke? Humph, why do you need such a huge amount of funds? Can't you wait a little longer? Didn't you say that your memory project department is already developing related products? Why are you in such a hurry?"

"Besides, aren't you in computer R&D? Can't you develop these expensive processors yourself?"

Upon hearing this, Wang Duoyu immediately retorted:

"Boss, you've been urging me to help you design and develop fighter jets since 1979. Haha, please stop pushing me. Otherwise, I can take my time."

The two have a very close relationship and they often bicker with each other. The leader doesn't act like a leader and the subordinates don't act like subordinates, so the current situation is very normal.

Lin Dehong became the supervisor in July 1979, and since then he has been urging Wang Duoyu to help him.

As a result, two years have passed now, and Wang Duoyu still hasn't helped him.

The establishment of the so-called computational fluid dynamics simulation software project has had no effect so far because the project has not yet been successful.

So, even though Lin Dehong was very angry, he had no choice but to wait patiently.

Lin Dehong: “.”

I am completely speechless!

"Okay, let's not talk about this topic anymore, let's talk about something else."

Lin Dehong changed the subject very stiffly, but he felt very powerless in his heart.

Wang Duoyu's request is too high, and he cannot do it within his authority unless his position can be promoted.

However, he was just promoted two years ago, and he hasn't made many contributions in the past two years, so wanting a promotion is wishful thinking.

After having a meal with Lin Dehong, Wang Duoyu returned to Harbin Institute of Technology. However, after the former changed the subject, he never mentioned the project funding again.

In the next few days, in addition to handling projects and other work, Wang Duoyu stayed in the office writing and drawing.

A large number of mathematical symbols are like Taoist ghost paintings, which are difficult to understand.

Some people often say that the end of science is metaphysics, which is actually not without reason.

In the office of the Department of Mathematics at Princeton University in the United States, John Conway got the latest issue of the "Harbin Institute of Technology Mathematical Journal" and saw the paper published by Wang Duoyu on Mathieu's moonshine conjecture.

A new moonlight conjecture has been proposed again. It seems that the Demon Group Moonlight Conjecture is really attracting much attention.

As one of the world's top mathematicians, Wang Duoyu's latest research direction is the Moonlight Conjecture, which surprised many people. At the same time, the Moonlight Conjecture, a problem in the field of number theory, has suddenly become a hot topic in the global mathematics community.

Who made Wang Duoyu so popular now?
Although many people believe that Wang Duoyu's IQ and mathematical talent are currently ranked very high in the world.

However, many extremely talented mathematical geniuses are unwilling to admit defeat. If they can deduce and prove this problem before Wang Duoyu verifies the Moonlight Conjecture, doesn’t that mean they are even more awesome than Wang Duoyu?
So many people flock to it!

Not everyone has the courage to tackle mathematical problems of hellish difficulty, such as the Riemann hypothesis, Yang-Mills existence and mass gap, Navier-Stokes equations existence and smooth lines.

Many people have wasted their youth after working hard for several years and finally have to give up.

Just like the Poincare conjecture, haven’t many people been working on it for ten or twenty years, or even their entire lives?
If Wang Duoyu had not turned this conjecture into a theorem, there would still be many people who would continue to work hard on it, and their lives would really be wasted.

Therefore, life must have both give and take.

As a British, John Conway considered himself a mathematical genius, but since he came to Princeton University, he no longer dared to think so.

This time, after reading Wang Duoyu's paper, he decisively gave up the moonlight conjecture.

John Conway not only has many scientific research results in number theory, but also has made considerable achievements in many fields such as combinatorial game theory and group theory, so it is not shameful to choose to give up the Moonshine Conjecture.

What's more, he was born in 1937. He is already 44 years old this year and has already lived more than half of his life. There is nothing to be pessimistic about.

Within two days, Conway received a letter from Worcester College, Oxford University.

This was a letter from his good friend Simon Norton, asking him about Mathieu's moonlight conjecture.

"After careful consideration, I have temporarily given up studying the Moonlight Conjecture. This problem is too difficult. My friend, I am sorry, I have to give up."

John Conway wrote this in his reply letter to the other party.

He explained the situation very sincerely, saying that the Moonlight Conjecture was indeed too complicated.

There must be a connection between the monster group and the J function, but what exactly this connection is, and what kind of mysterious correspondence exists between the order of the symmetry group and the coefficients of some special functions, all of which are unknown.

Perhaps there is not just one Moonlight Conjecture, but many different Moonlight Conjectures.

John Conway is already very old. He may have only competed with other mathematicians in the past, but now with Wang Duoyu added to the mix, he certainly wouldn't dare to take any more risks.

Because Wang Duoyu is too young, extremely talented, and has unparalleled mathematical ability.

If this kind of person comes to verify and deduce the Demon Group Moonlight Conjecture, perhaps just like the ABC Conjecture, it won't take long for him to deduce it.

For a 44-year-old mathematics professor at Princeton University, this was absolutely unacceptable.

Perhaps others could accept such an outcome, but John Conway definitely could not.

A week later, Simon Norton of Oxford University received John Conway’s letter, and for a moment everyone was silent.

The latter is already 44 years old, but Simon Norton is only 24 years old. He is one year younger than Wang Duoyu and is about to graduate with a master's degree.

“Maybe I should go to Harbin Institute of Technology for a PhD?”

Thinking of this, Simon Norton couldn't help but start preparing.

He knew that Wang Duoyu had just accepted six students in May, and this was reported in the news.

Thanks to the Australian John Stilwell, Wang Duoyu has become quite famous all over the world.

Although many newspapers did not report Wang Duoyu's photos, some newspapers still reprinted the photos of him giving a report at Princeton University in July last year in detail and introduced his identity.

So many people know Wang Duoyu’s personal information, and many people are gossiping about his stories with other university professors.

While other people in the entertainment industry were focused on news about cheating, the journalists were actually paying attention to Wang Duoyu's new theories and research results, as well as the "love-hate relationship" between him and other professors.

Really served!

Time flies, June has passed, and only a few days into July, the final exams have officially ended.

As soon as he walked out of the examination room, Yuan Jigang went straight to the office and found Wang Duoyu.

But what he never expected was that there were two guards with guns guarding the door of Wang Duoyu's office. No matter what he said, they would not let him in.

There’s nothing I can do, so I won’t go in.

A few days ago, Wang Duoyu discussed this matter with Liu Deben, so he applied for a separate office and asked the security department to help arrange someone to guard the door.

At the same time, there was someone guarding the door of the house where he lived.

All in all, starting from June, everything seemed to be different.

Obviously nothing happened, but Wang Duoyu was so cautious.

Hearing Yuan Jigang's voice, Wang Duoyu asked the former to come in, and the security staff let him in.

After walking in, Yuan Jigang immediately complained:

"Duoyu, what's going on with you? You even have to be on guard against me?"

"Old Yuan, you've been in the army before, so you should know more about the army's confidentiality regulations than I do, right?"

Wang Duoyu asked with a smile, and without waiting for the other party to answer, he immediately said:
"Look here, isn't it different from before?"

After being reminded by Wang Duoyu, Yuan Jigang immediately nodded.

The office in front of me is indeed different from the previous one. There is a reception room, a desk, and a completely impenetrable wall on the other side.

Yuan Jigang didn't know and had no way of knowing what was behind this wall.

Moreover, after hearing Wang Duoyu mention the military confidentiality regulations, Yuan Jigang would not ask so many questions.

"Duoyu, the final exams are over. Should we leave tomorrow?"

"No problem, as long as you have rested well, I can leave at any time."

Wang Duoyu has been looking forward to the upcoming hunting activity for a long time.

Participating in hunting activities is not just about harvesting prey, but for Wang Duoyu, it is also a journey of spiritual relaxation.

As a mathematics professor, he stays on campus all year round. He occasionally goes for a run when he has time, but he actually stays in the office most of the time and does not exercise much.

In other words, in the past six months or so, because of the seminars, he has often stood on the podium to share, which can be considered as a certain amount of exercise.

Therefore, Wang Duoyu was looking forward to going hunting, walking in the forest, seeing the animals, flowers, plants and trees, and getting in touch with nature.

"Okay, then we'll meet in the cafeteria tonight and talk about this while we eat."

Yuan Jigang left in a hurry again. Wang Duoyu shook his head and laughed, then buried his head in his work.

Lin Dehong collected several books from abroad, but after reading them, Wang Duoyu found that these were popular science articles and were useless.

Therefore, Wang Duoyu and Lin Dehong advised them to collect professional works published by professional magazines or university presses, rather than popular science articles or books.

The existence and smoothness problems of the Navier-Stokes equations are as difficult to solve as the Yang-Mills problem.

Wang Duoyu was mentally prepared for a long march, but the start was so frustrating that he couldn't help but feel tired.

Half an hour later, someone came to his office again. This time it was Yorkz and the other six people.

The six students came together, they must have made an appointment.

Although the six of them have different academic qualifications, such as master's degree, joint master's and doctoral degree, or doctorate, they are actually all slaves.

Of course, Wang Duoyu didn't really treat them like slaves, but the difficult problems they were studying were more difficult than the last.

Li Jun, who has the worst foundation, is still studying the four papers on the Poincaré conjecture. Yang Nianzhen, who has the best foundation, has already understood forty-four pages of the paper proving the ABC conjecture under the guidance of Wang Duoyu. To be honest, this progress is already very impressive.

The paper proving the ABC conjecture is very difficult, much more difficult than the paper proving the Poincare-Wang Duoyu theorem.

No matter what, Yang Nianzhen should be able to help guide Li Jun, but they came here together at this time, perhaps there are really difficult problems.

So what is the problem?

(End of this chapter)