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

Chapter 67: Hua Luogeng personally set the questions, and Lin Dehong: He only spent five hours to solve them
In Zhongguancun, Beijing, at the gate of the Institute of Mathematics of the Chinese Academy of Sciences, Wang Duoyu followed Lin Dehong and walked in. As soon as he got off the car, he saw Professor Tao Fangqi who was about to go out.

"Wang Duoyu? Why are you here? You've figured it out, right? I was just about to take your manuscript to Science China for review. You're here just in time. My teacher is still in the office. Come on, I'll take you to the onboarding process."

Tao Fangqi was very excited and thought that Wang Duoyu had figured it out. After all, he had returned to Beijing on the 15th and immediately went to talk to his teacher about the "part-time intern researcher" thing. However, his teacher did not agree and asked him to write a letter to Wang Duoyu to inform the latter of the requirements of the Institute of Mathematics.

If Wang Duoyu wants to become a 'part-time intern researcher', it is very simple. He just needs to complete a math problem within a month.

Hua Luogeng personally set the questions, how could it be easy?

You should know that he mainly engaged in research in the fields of analytic number theory, matrix geometry, classical groups, automorphic function theory, multi-complex function theory, partial differential equations, high-dimensional numerical integration, etc. The mathematical research results named after Hua alone include: Hua's theorem, Hua's inequality, Hua-Wang method, etc.

Wang Duoyu wants to become the first and currently the only "part-time" researcher in the Institute of Mathematics. Whether it is an intern, assistant, or deputy position, it is all "part-time" rather than full-time.

Therefore, it is definitely not enough to rely solely on the several papers Wang Duoyu has published in "Science China·Mathematics", as well as Tao Fangqi's previous three math problems and two papers related to topological spaces.

Tao Fangqi knew his teacher's assignment was difficult, so he subconsciously assumed Wang Duoyu wouldn't be able to complete it. After all, today was only the 19th. How many days had passed? Perhaps the letter had just arrived in Wang Duoyu's hands.

"Professor Tao, I'm sorry. I came here today to tell you that I've solved Director Hua's problem. Here, this is the manuscript I wrote. Please give it to Director Hua. I'll be in Beijing for the next few days. When I'm done with my work in a couple of days, I'll come visit you again and ask for your advice."

Wang Duoyu smiled, took out the manuscript he had written on the train and handed it to the other party.

To be honest, the question posed by Hua Luogeng was indeed difficult because it involved the heat equation in three-dimensional space, which is actually a type of partial differential equation, and was also mentioned by the French mathematician Fourier when he was conducting research on heat flow.

As we all know, the 19th century was a period of rapid development of partial differential equations. At that time, research on mathematical physics problems was also particularly prosperous, and many mathematicians made great contributions to problems at the mathematical physics level.

Hua Luogeng directly raised the problems he had encountered recently. If it were an ordinary genius, he might really fall into the trap, but Wang Duoyu was different. He was a mathematics professor in his previous life and had read many works on mathematics and physics during his doctoral studies.

The problem of partial differential equations in three-dimensional space was originally one of Wang Duoyu's favorite mathematical topics, because he liked to conduct research in this area in his previous life. It can also be said to be one of the hot topics at that time.

So while on the train, Wang Duoyu solved the problem. The proof process was not very detailed, but he believed that Hua Luogeng would definitely be able to understand it.

"You've figured it out?" Tao Fangqi asked in disbelief, his face filled with shock. At this moment, Lin Dehong added with a smile:
"Yes, I watched him write. Although I couldn't understand it, he finished writing shortly after he got on the train. It took him about five hours, and he kept chatting with us after that."

hiss!
"You mean he only spent five hours?" Tao Fangqi's face was filled with surprise. He blurted out the question, then immediately came to his senses and asked:

"Staff Officer Lin, are you saying that he's been with you all these days? Are you sure he only spent five hours solving this problem? Sorry, Staff Officer Lin, I'm not doubting you. What I'm saying is that if this is true, I'll need to redefine his mathematical talent. He can't design those guns with you anymore. He should come to our mathematics institute."

Taking a deep breath, Tao Fangqi continued to speak to Lin Dehong and Wang Duoyu in a serious tone:
"Staff Officer Lin, Mr. Wang, you really should come to our Institute of Mathematics. The National Science Conference was held in March of this year. Now is a new era of comprehensive respect for knowledge and talent. Whether in pure mathematical theory or applied mathematics, our Institute of Mathematics has embarked on a path of healthy development."

"Your talent shouldn't be wasted on other things. Mathematics is the foundation of all subjects. Mr. Wang, you should be very clear about this, so you should..."

Seeing that the other party was talking endlessly, Wang Duoyu couldn't help but interrupt and said, "Professor Tao, I agree with your point of view very much, but I am only here to deliver the manuscript today. How about we sit down and talk in detail another day?"

Today is the 19th, and Wang Duoyu just got off the train less than four hours ago. He changed his clothes in the guesthouse and then came to deliver the manuscript. He still has to go to Qianmen West Street later.

Besides, the weather is very hot now. To be honest, it’s a bit inappropriate to stand at the door and chat in the hottest days of summer. Although we are under the shade of the trees, it is still very hot.

Before Tao Fangqi could say anything, Feng Kang and Lu Qikeng came out from the door of the Institute of Mathematics. They saw the former standing and chatting with someone, and couldn't help but smile and asked Tao Fangqi to invite the person to go to the office to sit down and talk.

A bit embarrassing!

Tao Fangqi smiled helplessly at Feng Kang and Lu Qikeng, then nodded at Wang Duoyu, "Okay, I'll wait for you here. I'll also tell the security guards at the door that you can go directly to the reception room when you arrive."

After watching Wang Duoyu and Lin Dehong get into the car and leave, Tao Fangqi turned around and walked into the Institute of Mathematics. He ran into Zhang Guanghou and Yang Le again, and they asked him if he wanted to have lunch together.

How could Tao Fangqi eat at this time?

In the office, Hua Luogeng was still calculating, but when Tao Fangqi came in, he couldn't help but be dazed for a moment. After all, he was already 68 years old. Even if he didn't admit his age, his body was really old.

Seeing the manuscript in front of him, Hua Luogeng was surprised for a moment, and then he looked down to check it. The whole proof process was not detailed, but there was no doubt that Wang Duoyu had solved it.

The math wasn't that complicated, but Hua Luogeng still looked up in surprise and asked, "You just said he only spent five hours to solve it?"

PS: Do you have a monthly ticket?
(End of this chapter)