Chapter 206 Legend in an ordinary afternoon!
The family building of the Chinese Academy of Sciences is not very beautiful. It is a small gray cement building, just hidden in the busy city.
Xu Qingshan followed Wang Shicheng and Chen Dayue.
He and Chen Dayue carried the whiteboard and climbed the stairs.
Xu Qingshan was fine, but Chen Dayue was having a hard time.
"Teacher, if you can't do it, why don't you give it to me? I'll just hold it."
Xu Qingshan spoke out.
"Need not!"
Chen Dayue gasped, put the whiteboard on the ground, held his waist, and said huffing and puffing.
"It's just that I can't use my strength in this position! What's wrong with me? Who said I can't do it?"
"Okay, Xiao Chen, you are very good. Just calm down for a while and don't carry it on your back."
Wang Shichen looked helplessly at the stubborn Chen Dayue, took a whiteboard from his hand and continued walking up.
"Knock knock knock."
The three of them stood at the door of Mr. Wang's house, behaving strangely, and knocked on the door to greet him.
"Coming."
The door opens.
She is a middle-aged woman who looks very simple.
"Are you from Beijing University?"
"Hey, yes, hello."
"Dad, people from Beijing University are here!"
The middle-aged woman shouted into the house.
Wang Shichen tilted his head.
Even though he is an academician, he does not deserve to have a name.
But it doesn't matter, after all, this is Mr. Wang.
"Come in."
A very energetic voice came from the house. Xu Qingshan and the three of them followed the middle-aged woman into the house, put on slippers, and went to a balcony where they saw an energetic woman lying down. An old man sunbathing on a rocking chair on the balcony.
When the old man saw the three people coming, he slowly stood up from his chair.
"Young man, do you want to see me?"
Wang Yuan looked at Xu Qingshan with a smile on his face.
"I seem to have seen you on TV. Your name is Xu Qingshan, right?"
Before Xu Qingshan could introduce himself, Wang Yuan said with great interest.
"It's me, hello, Academician Wang."
Xu Qingshan was very respectful.
Xu Qingshan respects this kind of national scholar who has made great contributions from the bottom of his heart.
"Don't call me academician. If you come to ask me questions, just call me Teacher Wang."
Wang Yuan was full of energy and did not look like an old man who was nearly 80 years old at all. Although he was lying on the balcony basking in the sun, there was a stack of books on the small tea table beside him.
Xu Qingshan took a few glances and saw that they were all books related to number theory.
Some of the books are obviously wrinkled from being read too many times.
Even though this old man has left the front line of scientific research, he still maintains his focus on academics, life, and society.
"Mr. Wang, it's like this."
Wang Shicheng respectfully told Wang Yuan about Xu Qingshan's live demonstration of the weak twin prime conjecture at the Talent Exchange Center.
Wang Yuan originally looked at Xu Qingshan as he looked at a younger generation.
But after he listened to Wang Shichen's words, he was stunned for a moment.
He looked at Xu Qingshan carefully again.
"Go to the study and set up the whiteboard for me to see."
After Wang Yuan finished speaking, he took the lead and left the balcony and walked towards the study.
Chen Dayue had been completely absent from the back. At this time, he ran to the door, carried the whiteboard and carried it to the study.
All four of them arrived in the study.
"Put up the whiteboards."
Wang Shicheng and Chen Dayue came to help, and Xu Qingshan said the order.
At this time, Xu Qingshan saw another certificate in the study room. It was placed directly on the bookshelf. There was no packaging or glass cover. It looked ordinary. The paper on the certificate was also a little yellowed, but the top The words are very conspicuous, and they are still handwritten.
[First Prize of the First National Natural Science Award]
[Study on Goldbach’s conjecture]
[1982 Chen Jingrun, Wang Yuan, Pan Chengdong]
This chronological certificate is the greatest honor in the lives of these three people.
There were also some calligraphy works in the study room, one of which was hung in the most conspicuous position. Xu Qingshan saw the signature of the calligraphy work.
[Efforts do not count years, self-improvement never stops]
【Hua Luogeng】
Wang Yuan didn't pay attention to that. He had begun to look at Xu Qingshan's proof process on the whiteboard seriously.
Mr. Wang was seen crossing his chest with his hands, staring at the whiteboard with burning eyes, moving his fingers from time to time, his eyes focused, and he quickly entered the state.
Wang Shicheng and Chen Dayue stood aside and did not dare to disturb the old man.
Xu Qingshan was observing the study.
He felt that he seemed to feel some different energies from this study, and he was transforming and absorbing these energies into something of his own.
It was very quiet in the study.
After a long time, Wang Yuan suddenly frowned and asked.
"Why did it end here?" "There were so many people just now, so I'm sorry to continue testifying."
Xu Qingshan immediately answered the call.
These words made Chen Dayue and Wang Shichen on the side twitch their mouths.
I never expected that Xu Qingshan would say this reason.
"Can you prove it now?"
Wang Yuan found a pair of reading glasses from the side and took out a pile of draft paper.
"Come on, you can prove it now."
Xu Qingshan did not refuse, but took the draft paper and pen and continued writing along the contents on the whiteboard.
Wang Yuan just stood next to Xu Qingshan, hands behind his back, watching Xu Qingshan sitting at the desk to prove.
Wang Shichen and Chen Dayue were like two door gods. They didn't even get close.
Mainly.
First of all, the two of them do not have a deep understanding of this aspect, and they may not have been able to understand it very well in the past. It is enough to have Mr. Wang around.
On the other hand, I am worried that this summer, the old man did not turn on the air conditioner, which made the old man's house very hot.
How presumptuous.
"You want to use algebraic geometry to complete the argument, do you want to avoid the problem of sieve parity?"
"Well, yes."
"Then why don't you try to take yourself a step further and simply improve the screening method?"
"Maybe this will be faster? Just take the first step from 0 to 1."
Xu Qingshan was stunned for a moment.
He realized the meaning of Wang Yuan's words.
Wang Yuan didn't mean any ridicule, he spoke to Xu Qingshan very seriously.
"I have actually never thought of this route, but when I was watching your argument just now, I kept thinking about a question."
"Teacher, please tell me."
Xu Qingshan felt that a very important point was right in front of him, and he was about to seize it.
"The sieve method is a powerful tool in number theory research to convert the information you have understood into the information you are trying to know. For example, if you know some specific technical methods about arithmetic series, then you can completely convert it into some information about prime numbers. Recent interval information.”
In recent years, Wang Yuan has focused more of his experience on popular science mathematics research.
He is very concerned about the mathematics education of the younger generation. For this reason, he often goes out to give lectures to people. He hopes that young people should not be too ambitious and look at Goldbach's conjecture, but should lay a good foundation in mathematics.
So when Wang Yuan expressed it, he was very clear.
Xu Qingshan seemed to see a clear sky with a white cloud in the sky.
As Wang Yuan thought and discussed, the shape of the cloud became clearer and clearer in his eyes.
"Although the sieve method seems very simple when used, many times you need to use a strong conclusion to make the sieve method work. If you want to use the sieve method to prove the weak twin prime conjecture, then you must control the input Way to get the information you want through screening, isn’t it?”
Wang Yuan continued.
"But whether it is the weak twin prime conjecture or the one-step twin prime conjecture, it is not very suitable for the traditional screening method we used to demonstrate Goldbach's conjecture."
Wang Yuan stood in front of the whiteboard and tapped and clicked on Xu Qingshan's calculations.
"Here, here, and here."
"These are the parts I did with my teacher back then. Jingrun also struggled with this problem, but now you are trying to prove the infinite. I am not very good at using computers nowadays, but it is very difficult to control the input. I wonder if you can directly make more specific improvements to the screening method itself."
"Making this method more efficient for certain types of information transformation means that you only need to use weak inputs to get prime-spaced results."
When Wang Yuan said this, he was picked up by Xu Qingshan.
"Finite field!"
"If I combine algebraic geometry and finite fields, and the two methods are synchronized and integrated into the sieve method input system, then I am..."
Xu Qingshan felt that his hand had grasped the white cloud.
White, soft, and very elastic.
It was like a marshmallow, he sucked it gently, and it was as delicious as milk.
"I see!"
The pen in Xu Qingshan's hand moved at an extremely fast speed again.
It’s true that mathematicians need computers.
But it may not be necessary.
After all, for some top mathematicians, their brains can process information faster, more jumpy, and more uniformly than computers.
Wang Shicheng and Chen Dayue looked at each other.
This.
Could it be that
I am about to witness a great moment?
"Teacher, look."
Xu Qingshan pointed to the staged results on a piece of draft paper.
"I give any positive decimal integer, there are infinitely many prime numbers, and the decimal representation of the last one that comes out does not contain the given positive integer."
"I seem to have passed the hurdle of the weak twin prime conjecture."
Xu Qingshan murmured.
He knows that in mathematical research, sometimes inspiration and state of mind come in a moment.
It's not as exciting as in the legend, and it's not as turbulent as in the movie.
It might just be on a hot summer afternoon.
In an old man's study.
The not too harsh sunlight fell through the window on the young man's face, shining brightly.
It seems to be at such a dull time.
The mountain of weak twin prime conjecture.
Officially passed by Xu Qingshan with his own hands and pen.
(End of chapter)